Safety valves, directly operated

Transcription

1 /6 Safety valves, directly operated RE 2500-XC-B2/06.09 Replaces: ype DBDH...X/...XC...E Nominal size (NG) Unit series X H7397 Safety valves for potentially explosive atmospheres art II echnical Data Sheet Information on safety: Range of application as type-tested valve in accordance with the ressure Equipment Directive 97/23/EG Information on explosion protection: Range of application in accordance with the Explosion rotection Directive and type of protection Ranges of application as per Directive 94/9/EG: IM2, II2G, II2D ype of protection of valve: c (EN : ) What you need to know about these Operating Instructions hese Operating Instructions apply to the explosion-proof version of Rexroth valves, and consist of the following three parts: art I General Information RE 0700-X-B art II echnical Data Sheet RE 2500-XC-B2 RE 2500-XC-B0 art III roduct-specific Instructions RE 2500-XC-B3 You can find further information on the correct handling of Rexroth hydraulic products in our publication General roduct Information on Hydraulic roducts, RE

2 2/6 Bosch Rexroth G Hydraulics DBDH...X/...XC...E RE 2500-XC-B2 Overview of Contents Contents age Features 2 Ordering data and scope of delivery 3 Component identification mark 3 Function, sectional diagram, symbol 4 echnical data 5 Information on explosion protection 5 Characteristic curves for maximum permitted flow rate 6 Important information for operation in accordance with the ressure Equipment Directive 97/23/EG 7 Characteristic curves with back pressure in the flow line 8... Unit dimensions Features s EX units in accordance with Directive 94/9/EG for ranges of application: IM2, II2G, II2D s type-tested safety valves in accordance with ressure Equipment Directive 97/23/EG s screw-in valve (cartridge) For threaded connection For sub plate mounting djustment with hand wheel

3 RE 2500-XC-B2 DBDH...X/...XC...E Hydraulics Bosch Rexroth G 3/6 Ordering data and scope of delivery DBD H X XC E ressure relief valve, directly operated Setting element for pressure adjustment Hand wheel = H Nominal size (NG) = 4, = 6, = 0, = 20, = 30 Version Screw-in valve (cartridge) = K hreaded connection ) = G Sub plate mounting ) = Unit series 0 to 9 = X (0 to 9: installation and connection dimensions unchanged) Set response pressure (bar) 2) = 30 bis 630 XC = E = ype-tested safety valve as per ressure Equipment Directive 97/23/EG Seal material V = FKM-seals 3) No code = NBR-seals 4) Note: ake compatibility of seals and pressure fluid into account! Explosion protection Constructional Safety, see information on explosion protection, page 5, for details ) Not possible with size NG4 2) Operating limits, page 5 3) ll pressure stages possible 4) ressure stages < 35 bar possible Included in scope of delivery: Valve operating instructions with Declaration of Conformity in art III Note: Not all combinations of the above type codes are available. Component identification mark ype-tested safety valves have a component code, which is composed of elements that are always the same, the meaning of which is described to example below: ÜV. SV ,5. F Set response pressure in bar Maximum permitted flow rate in l/min without back pressure in the flow line Valve for pressure fluid Narrowest flow diameter before the valve seat in mm Number of component code assigned by the testing authority Last two digits indicating the year in which the validity of the component code was last extended Safety valve Designation of the named authority that conducted type testing

4 4/6 Bosch Rexroth G Hydraulics DBDH...X/...XC...E RE 2500-XC-B2 Function, sectional diagram, symbol Valves of the type DBDH X/ XC E are type-tested, directly operated pressure relief valves which conform to the ressure Equipment Directive 97/23/EG. hey are employed for reducing system pressure and are intended for use as safety valves. When the preset response pressure is exceeded in the duct, the valves react and connect the and ducts internally. he valves are available in different versions: as screw-in valve K for screwing into blocks, as a valve with threaded connection G, or as a valve for subplate mounting ( G and are not possible with size NG4). he screw-in valve itself, which is used in all versions, basically consists of the sleeve (7), spring (6), cone (5., response pressure up to 400 bar) or ball (5.2, response pressure 405 bar and over), valve seat (4) and setting element (8). he spring presses the cone (5.) or the ball (5.2) against the valve seat (4). he response pressure is factory-set to a fixed value using the setting element, then the valve is sealed. he duct is connected to the system. he pressure predominating in the system acts on the cone or the ball. If the pressure in the duct rises above the value set by the pretension of the spring, the cone or the ball lifts up from the valve seat against the spring force, and connects the and ducts. he pressure fluid flows out of the duct into the duct. Design measures limit the maximum possible lift of the cone. he valves are available with graduated response pressures (in 5 bar increments). he valve spring can be relieved of tension using the hand wheel, and the response pressure can be reduced from the factory setting without having to remove the seal. o do this, please refer to art III of the Operating Instructions, RE 2500-XC-B3, section 5.3. Example illustration with symbol: Screw-in valve DBDH 0 KX/...XC...E Response pressure bar Response pressure bar (ball poppet valve NG0) Screw-in valve type yp DBDH 4 KX/...XC...E Response pressure bar duct duct, 2 O-rings on valve body 3 xial or radial sealing of single seal 3., 3.2 Sealing elements of axial or radial seal of multiple seal 4 Valve seat 5. Valve cone 5.2 Valve ball 6 Spring 7 Sleeve 8 Hand wheel setting element

5 RE 2500-XC-B2 DBDH...X/...XC...E Hydraulics Bosch Rexroth G 5/6 echnical data General Installation position Optional mbient temperature range C (FKM-seals) (NBR-seals) Storage temperature range C (FKM-seals) (NBR-seals) Dimensions, weight See Unit dimensions from page 2 Surface protection for versions G and aint, layer thickness max. 00 μm Degree of protection to EN 60529:99+:2000 I 65 Hydraulic (measured at a viscosity of ν = 32 mm 2 /s and a pressure fluid temperature of 40 C) Set response pressure bar See last number of component identification mark Maximum back pressure in flow line bar See page 8... Characteristic curves with back pressure in the flow line Maximum flow rate l/min See penultimate number of component identification mark and page 6 onwards, Characteristic curves for maximum permitted flow rate ressure fluid Mineral oil (HL, HL) to DIN 5524, other pressure fluids available on request Ignition temperature > 80 C ressure fluid temperature range When used as a safety valve C ) Viscosity range When used as a safety valve mm 2 /s ) Maximum permitted degree of contamination of pressure fluid purity class to ISO 4406 (c) Class 20/8/5 Operating limits NG Response pressure p in bar Max. flow rate q Vmax in l/min 4 6, 0, 20, 30 See characteristic curves and last number of component identification mark See characteristic curves and last number of component identification mark Information on explosion protection Range of application as per Directive 94/9/EG IM2, II2G IM2, II2D ype of protection of valve c (EN : ) c (EN : ) Maximum surface temperature emperature class C 25 4 Degree of protection I 65 Special conditions for safe use he screw-in valve (cartridge) must not be painted! 4 ) If the valve is not employed as a safety valve in accordance with ressure Equipment Directive 97/23/EG, the temperature of the pressure fluid must not exceed +80 C, the viscosity must not exceed 800 mm 2 /s.

6 6/6 Bosch Rexroth G Hydraulics DBDH...X/...XC...E RE 2500-XC-B2 Characteristic curves for maximum permitted flow rate Response pressure p in bar Response pressure p in bar NG4 Flow rate q Vmax in l/min NG0 Response pressure p in bar Response pressure p in bar NG20 NG6 Flow rate q Vmax in l/min Flow rate q Vmax in l/min Flow rate q Vmax in l/min Response pressure p in bar NG30 Note: Value pairs that are located in the gray areas of the characteristic curves cannot be achieved with the valve! he characteristic curves presented here apply solely to a back pressure of 0 bar in the flow line Flow rate q Vmax in l/min

7 RE 2500-XC-B2 DBDH...X/...XC...E Hydraulics Bosch Rexroth G 7/6 Important information for operation in accordance with the ressure Equipment Directive 97/23/EG Before you order a type-tested safety valve, please note that at the desired response pressure p, the maximum permitted flow rate q Vmax of the safety valve is greater than the maximum possible flow rate of the system/accumulator which the valve is intended to protect. With this in mind, please note the appropriate regulations. In accordance with ressure Equipment Directive 97/23/EG, the system pressure may not increase due to the flow rate by more than 0 % of the set response pressure (see component code). he maximum permitted flow rate q Vmax specified in the component code must not be exceeded. Flow lines from safety valves must exit safely. It must not be possible for fluid to collect in the flow system (see D2000, code of practice 2). Essential notes for use! he response pressure specified in the component code is factory-set at a flow rate of 2 l/min. he maximum permitted flow rate specified in the component code applies to applications without back pressure in the flow line (port ). If the seal on the safety valve is removed, the valve no longer conforms to the ressure Equipment Directive! he requirements of the ressure Equipment Directive and the D2000 code of practice 2 must be observed! We strongly recommend that type-tested safety valves are secured by means of wiring and sealing to the housing/block (bore hole available in setting element), to prevent their unauthorized removal from the screw-in housing/block. Note he rising flow rate causes the system pressure to increase by the amount of the back pressure in the flow line (port ). Note D2000 code of practice 2, item 6.3. In order to ensure that this rise in system pressure due to the flow rate does not exceed 0 % of the set response pressure, the permitted flow rate must be reduced as a function of the back pressure in the flow line (port ) (see pages 8 to ).

8 8/6 Bosch Rexroth G Hydraulics DBDH...X/...XC...E RE 2500-XC-B2 Characteristic curves NG4 with back pressure in the flow line s far as possible, the valve should basically be operated with no back pressure in the flow line. If there is back pressure in the flow line, the maximum possible flow rate is reduced. here is a relationship between the maximum permitted back pressure p in the flow line and the flow rate q V, which can be seen in the characteristic curves below. p [bar] p [bar] he curves for intermediate response pressure values that are not shown below must be calculated by means of interpolation. When the flow rate is around zero, the maximum permitted back pressure p is 0 % of the respective response pressure. s the flow rate increases, the maximum permitted back pressure p decreases , DBDH 4 KX/...XC...E 7 II - p = 60 bar 2 - p = 00 bar 3 - p = 200 bar 4 - p = 35 bar 5 - p = 320 bar 6 - p = 350 bar 7 - p = 500 bar I 5 7 q Vmax [l/min] Diagram for determining the maximum permitted back pressure p in the flow line at port of the valve as a function of the flow rate q Vmax for DBDH 4KX/...XC...E valves with different response pressures p. p Response pressure in bar p Maximum permitted back pressure in the flow line (port ) in bar q Vmax Max. maximum flow rate in l/min I II Interpolation area I, for DBDH 4KX/...XC...E valves with response pressure p = bar and maximum flow rate q Vmax = 0 l/min Interpolation area II, for DBDH 4KX/...XC...E E valves with response pressure p = bar and maximum flow rate q Vmax =7 l/min Interpolation of intermediate values from the diagram. Enter the /0 value of the response pressure p on the p axis. 2. From the above point, draw a straight line to where the q Vmax axis crosses zero, keeping inside the interpolation area (here, 0 l/min for interpolation area I or 7 l/min for interpolation area II). 3. On the q Vmax axis, enter the system flow rate that is not to be exceeded. 4. For this value, ascertain the maximum permitted back pressure on the basis of the line on the p axis that you have just drawn. Example with available curve System/accumulator flow rate that is not to be exceeded: q Vmax = 5 l/min Safety valve set to: p = 500 bar. From the diagram (see arrows, curve 7), read the maximum permitted back pressure p of approx. 36 bar. Example 2 with interpolated curve System/accumulator flow rate that is not to be exceeded: q Vmax = 5 l/min Safety valve set to: p = 50 bar. Value to be entered on the p axis: /0 x 50 bar = 5 bar. From the diagram (see arrows, dotted curve), read the maximum permitted back pressure p of approx. 8 bar.

9 RE 2500-XC-B2 DBDH...X/...XC...E Hydraulics Bosch Rexroth G 9/6 Characteristic curves NG6 with back pressure in the flow line p [bar] ,5 22,5 2 7 p [bar] ,5 0 00% x% DBDH 6...X/...XC...E I 8 x% % II - p = 30 bar 2 - p = 60 bar 3 - p = 0 bar 4 - p = 5 bar 5 - p = 70 bar 6 - p = 20 bar 7 - p = 35 bar 8 - p = 400 bar q Vmax [l/min] 52 Diagram for determining the maximum permitted back pressure p in the flow line at port of the valve as a function of the flow rate q Vmax for DBDH 6 X/ XC E valves with different response pressures p. p Response pressure in bar p Maximum permitted back pressure in the flow line (port ) in bar q Vmax Max. maximum flow rate in l/min I II Interpolation area I, for DBDH 6 X/ XC E valves with response pressure p = bar and maximum flow rate q Vmax = 4 27 l/min Interpolation area II, for DBDH 6 X/ XC E valves with response pressure p = bar and maximum flow rate q Vmax = 52 l/min Interpolation of intermediate values in the diagram. Enter the /0 value of the response pressure p on the p axis. 2. Determine the neighboring, lower and higher curve from this point. he point entered on p divides the section between the lower and higher curve on the p axis with a certain percentage 3. On the q Vmax axis, divide the section between neighboring, lower and higher curves, using the same percentage as the section on the p axis. Draw a straight line from the point where the q Vmax axis crosses zero, which you have just determined, and the previously entered value on the p axis. 4. On the q Vmax axis, enter the system flow rate that is not to be exceeded. 5. For this value, ascertain the maximum permitted back pressure on the basis of the line on the p axis that you have just drawn. Determining the permitted back pressure Example with available curve System/accumulator flow rate that is not to be exceeded: q Vmax = 5 l/min Safety valve set to: p = 35 bar. From the diagram (see arrows, curve 7), read the maximum permitted back pressure p of approx bar. Example 2 with interpolated curve System/accumulator flow rate that is not to be exceeded: q Vmax = 5 l/min Safety valve set to: p = 80 bar. Value to be entered on the axis designated as p : /0 x 80 bar = 8 bar. From the diagram (see arrows, dotted curve), read the maximum permitted back pressure p of approx. 3 bar.

10 0/6 Bosch Rexroth G Hydraulics DBDH...X/...XC...E RE 2500-XC-B2 Characteristic curves NG0 with back pressure in the flow line p [bar] p [bar] , DBDH 0...X/...XC...E - p = 30 bar 2 - p = 60 bar 3 - p = 0 bar 4 - p = 70 bar 5 - p = 75 bar 6 - p = 20 bar 7 - p = 35 bar 8 - p = 400 bar 9 - p = 405 bar 0 - p = 630 bar 300 3, , q Vmax [l/min] Diagram for determining the maximum permitted back pressure p in the flow line at port of the valve as a function of the flow rate q Vmax for DBDH 0 X/ XC E valves with different response pressures p. ntermediate values can be ascertained with the aid of interpolation. lease refer to the explanations on the previous pages for the interpolation process. p p q Vmax Response pressure in bar Maximum permitted back pressure in the flow line (port ) in bar Max. maximum flow rate in l/min Interpolation areas

11 RE 2500-XC-B2 DBDH...X/...XC...E Hydraulics Bosch Rexroth G /6 Characteristic curves NG20 and NG30 with back pressure in the flow line p [bar] p [bar] , DBDH 20...X/...XC...E - p = 30 bar 2 - p = 60 bar 3 - p = 0 bar 4 - p = 70 bar 5 - p = 20 bar 6 - p = 35 bar 7 - p = 320 bar 8 - p = 400 bar q Vmax [l/min] Diagram for determining the maximum permitted back pressure p in the flow line at port of the valve as a function of the flow rate q Vmax for DBDH 20 X/ XC E valves (diagram above) and DBDH 30 X/ XC E valves (diagram below) with different response pressures p. Intermediate values can be ascertained with the aid of interpolation. lease refer to the explanations on the previous pages for the interpolation process. p [bar] p [bar] , DBDH 30...X/...XC...E 6 - p = 30 bar 2 - p = 60 bar 3 - p = 0 bar 4 - p = 70 bar 5 - p = 20 bar 6 - p = 35 bar q Vmax [l/min]

12 2/6 Bosch Rexroth G Hydraulics DBDH...X/...XC...E RE 2500-XC-B2 Unit dimensions: Screw-in valve NG4 (in mm) Visual Sichtkontrolle inspection 4 3 R0, +0, 5 2 max. 94 t 6 3,0±0,5 t min. 40 R0,2 +0,2 2 Hand wheel setting element 2 Stamped type designation 3 Hexagon, width across flats 7 mm 4 Lock nut, width across flats 7 mm 5 ort, anywhere on the perimeter t...6 M4x min 0,8 olerancing: DIN 767 General tolerances: ISO 2768-mk 0,05 ) Minimum diameter in recess 2) ll edges of sealing ring insertion taper rounded and free from burrs 3) Fitting depth 4) Maximum dimension with response pressure at lowest setting

13 RE 2500-XC-B2 DBDH...X/...XC...E Hydraulics Bosch Rexroth G 3/6 Unit dimensions: Screw-in valves NG6 to NG30 (in mm) R0,2±0, 3) 6 S t 6 45 α L28 ØD9-0,2 ) ØD6 7 ØD3 D4 ØD5 x ØD7 ØD8 L23 2) Hand wheel setting element L24 Ø 0,05 L25 L26 L27 0,02 L29 L30 L3 x 0,5 x 45 Ø 0, 2 Lock nut, width across flats 9 mm 3 Stamped component code 4 Stamped type designation and response pressure 5 Fitting depth x = Rz... 6 olerancing: DIN 767 General tolerances: ISO 2768-mk 6 ort, anywhere on perimeter 7 ort, anywhere on perimeter or on end face ) Maximum dimension 2) Maximum dimension with response pressure at lowest setting 3) Edge of sealing ring insertion taper rounded and free from burrs Screw-in valve NG ØD3 L23 L24 S Weight ,5 32 ca. 0.4 kg ca. 0.5 kg ca. kg ca. 2.2 kg Screw-in bore hole NG D4 ØD5 ØD6 ØD7 ØD8 ØD9 L25 L26 L27 L28 L29 L30 L3 α 6 M28 x.5 25 H ± M35 x.5 32 H ± M45 x.5 40 H ± M60 x 2 55 H ±

14 4/6 Bosch Rexroth G Hydraulics DBDH...X/...XC...E RE 2500-XC-B2 Unit dimensions: Sub plate mounting, NG6 to NG30 (in mm) 0,0 00mm 5 4 L3 Ø6 L L4 () L2 ØD H3 H2 L7±0, ØD3 L5±0, L6±0, ØD4; 2 - Rt 4 Required surface quality of valve bearing surface olerancing: DIN 767 General tolerances: ISO 2768-mk () B B2 B±0, 5 L7 L6 L5 Screw-in valve, example illustration ) 2 Connecting bore (), e.g. for pressure measurement, sealed when supplied with screw plug (see dimension table for ()) Not available for NG0 with pressure stages > 400 bar 3 Nameplate 4 Locating pin 5 Valve bearing surface 6 Four valve fastening bores ) See page 3 for dimensions L4±0, D2; In order to ensure a secure connection, use only the following valve fastening bolts (order separately): 4 hexagon socket head cap screws ISO flzn-240h-l (coefficient of friction μ total = 0.09 to 0.4) Valve fastening bolts to ISO ) NG Dimensions roperty class Material number 6 M6 x R M8 x R M8 x R M0 x R ) ppropriate specified bolts to DIN 92 may also be used as an alternative. ressure relief valve NG B B2 ØD H2 H3 L L2 L3 L4 L5 L6 L7 () Weight G/4 ca..5 kg G/2 ca. 3.7 kg G3/4 ca. 6.4 kg G /4 ca. 3.9 kg NG Maximum overall length with response pressure at lowest setting Detail dimensions of mounting hole configurations NG B D2 ØD3 ØD4 L4 L5 L6 L M M M M

15 RE 2500-XC-B2 DBDH...X/...XC...E Hydraulics Bosch Rexroth G 5/6 Unit dimensions: hreaded connection, NG6 to NG30 (in mm) ØD D2 B () H2 H H3 L L2 D4; 4 L3 L5 L4 ØD3 3 2 olerancing: DIN 767 General tolerances: ISO 2768-mk L6 () B B2 Connecting bore (), (e.g. for pressure measurement), with screw plug, for dimensions see D2 Not available for NG0 with pressure stages > 400 bar 2 Screw-in valve, example illustration ) 3 Four valve fastening bores 4 Nameplate ) See page 3 for dimensions ressure relief valve NG B B2 ØD D2 ØD3 D4 H H2 H3 L L2 L3 L4 L5 L6 () Weight G/4 6.6 M G/4 ca..5 kg G/2 9 M G/2 ca. 3.7 kg G 9 M G ca. 6.4 kg G /2 M G /2 ca. 3.9 kg NG Maximum overall length with response pressure at lowest setting

16 6/6 Bosch Rexroth G Hydraulics DBDH...X/...XC...E RE 2500-XC-B2 Unit dimensions: Cut-out in sheet metal for valve mounting in version for subplate mounting (in mm) NG B B2 H H2 ØD H3 ØD2 H3 R Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany elefon +49 (0) / 8-0 elefax +49 (0) / documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

17 RE M/08.00 RE M/08.00 ressure relief valve, direct operated, sea water resistant ype DBD J Series X Features of the sea water resistant version When compared to the standard version the following modifications have been carried out: he external components have been zinc galvanised (main housing, cartridge housing, adjustment) Sea water resistance is identified by the code J in the ordering code Note: Valve fixing screws must be ordered separately: Nominal size 6: 4 off M6 x 50 DIN C NEL ), M = 5,5 Nm, Material number: Nominal size 0: 4 off M8 x 70 DIN C, NEL ), M = 37 Nm, Material number: Nominal size 20: 4 off M8 x 90 DIN C, NEL ), M = 37 Nm, Material number: Nominal size 30: 4 off M0 x 0 DIN C, M = 75 Nm, order in clear text. ) he code NEL stands for non-electrolytically applied zinc coatings which contain a lubrication additive for the reduction of friction in accordance with ISO/WD Colour: silver. Further information can be obtained from the standard documentation RE Ordering details, preferred types DBD S G X / J * djustment element Grub screw with hexagon = S and protective cap Nom. size = 6 = 8 = 0 = 5 = 20 = 25 = 30 Connection G/4 G3/8 G/2 G3/4 G G /4 G /2 For threaded connections = G No code = NBR seals V = FKM seals J = Sea water resistant ressure stage 25 = Settable pressure up to 35 bar 50 = Settable pressure up to 35 bar 00 = Settable pressure up to 00 bar 200 = Settable pressure up to 200 bar 35 = Settable pressure up to 35 bar 400 = Settable pressure up to 35 bar 630 = Settable pressure up to 35 bar X = Series 0 to 9 DBD...J /2

18 RE M/08.00 referred types referred types ype Material number DBDS 6 GX/35J DBDS 8 GX/00J DBDS 0 GS/00J DBDS 5 GX/35J DBDS 20 GX/00J DBDS 25 GX/200J DBDS 30 GX/35J Mannesmann Rexroth G Rexroth Hydraulics D-9783 Lohr am Main Jahnstraße 3-5 D-9786 Lohr am Main elefon / 8-0 elefax / elex product.support@rexroth.de Internet Mannesmann Rexroth Limited Cromwell Road, St Neots, Cambs, E9 2ES el: / Fax: / info@rexroth.co.uk he specified data is for product description purposes only and may not be deemed to be guaranteed unless expressly confirmed in the contract. ll rights reserved Subject to revision 2/2 DBD...J

19 ressure relief valve, directly operated RE 25408/0.05 /6 Ersetzt: ype DB6D Nominal size 6 Unit series X Maximum working pressure 35 bar Maximum flow rate 60 l/min Overview of contents Contents age Features Ordering data and scope of delivery 2 referred types 2 Function, sectional diagram 3 echnical data 3 Characteristic curves 4 Unit dimensions 5 and 6 Features For subplate mounting 3 pressure setting elements, choice of: Sleeve with hexagon socket Rotary knob, lockable, with scale Rotary knob with scale

20 2/6 Bosch Rexroth G Industrial Hydraulics ype DB6D RE 25408/0.05 Ordering data and scope of delivery DB 6 D W X / V * ressure relief valve = DB Nominal size 6 = 6 Directly operated ressure relief in -duct ressure relief in and B-ducts Mounting hole configuration to ISO 6264 = D = B = B = W Setting elements Sleeve with hexagon socket = 2 Rotary knob, lockable, with scale ) = 3 Rotary knob with scale = 7 ) 2H key included in scope of delivery = Further information in plain text No code = horizontal adjustment W65 = vertical adjustment V = FM seals (other seals available on request) Note ake compatibility of seals and pressure fluid into account! 80 = max. setting pressure = 80 bar 60 = max. setting pressure = 60 bar 35 = max. setting pressure = 35 bar X = Unit series 0 to 9 (0 to 9: installation and connection dimensions unchanged) referred types (available at short notice) ype Material No. Setting Symbols DB 6DW2 X/80V DB 6DW2 X/60V DB 6DW2 X/35V DB 6DW7 X/80V DB 6DW7 X/60V DB 6DW7 X/35V DB 6DW3 X/80V DB 6DW3 X/60V DB 6DW3 X/35V Horizontal DB 6DB W 2 X/80V W DB 6DB W 2 X/60V W DB 6DB W 2 X/35V W DB 6DB W 7 X/80V W DB 6DB W 7 X/60V W DB 6DB W 7 X/35V W DB 6DB W 3 X/80V W DB 6DB W 3 X/60V W DB 6DB W 3 X/35V W Vertical

21 RE 25408/0.05 ype DB6D Industrial Hydraulics Bosch Rexroth G 3/6 Function, sectional diagram General ype DB 6 D pressure valves are directly operated pressure relief valves. hey are used to limit the system pressure. ressure relief valves essentially consist of the main valve () with main piston insert (2) and the pressure setting element (3). he pressure arising in the -duct acts on the main piston (2). If the pressure in the -duct exceeds the value set at the spring (5), the poppet (4) opens towards the spring (5) and the main piston (2) can then move against the spring. his causes pressure fluid to flow from duct to via the metering notch (6) echnical data General Valve function ressure relief valve, directly operated ype of mounting Subplate, mounting hole configuration NG6, ISO 6264 Mounting position Optional mbient temperature range C Weight Horizontal kg.4 Hydraulic Vertical kg. ressure fluid Mineral oil (HL, HL) to DIN 5524, rapidly biodegradable pressure fluids to VDM (also see RE 9022), HEG (rapeseed oil), HEG (polyglycols), HEES (synthetic ester), other pressure fluids available on request Maximum permissible degree of Class 20/8/5 ) contamination of pressure fluid urity class to ISO 4406 (c) ressure fluid temperature range C Seals FM (Viton Dupont) Viscosity range mm 2 /s Max. setting pressure bar 80, 60 or 35 Max. working pressure bar 35 Max. flow rate l/min 60 ) he purity classes stated for the components must be complied with in hydraulic systems. Effective filtration prevents problems and also extends the service life of components. For a selection of filters, see catalog sections RE 50070, RE and RE 5008.

22 4/6 Bosch Rexroth G Industrial Hydraulics ype DB6D RE 25408/0.05 Characteristic curves (υ = 35 mm 2 /s) Horizontal setting Vertical setting p = 80 bar p [bar] Q [l/min] p [bar] Q [l/min] p = 60 bar p [bar] p [bar] Q [l/min] Q [l/min] p = 35 bar p [bar] p [bar] Q [l/min] Q [l/min]

23 RE 25408/0.05 ype DB6D Industrial Hydraulics Bosch Rexroth G 5/6 Unit dimensions (nominal dimensions in mm) 2H lock , (M0) Rexroth = 47 ±4,7 Nm reg: bar max: SI max: bar M5x40 DIN (4x) NG6 ISO x Ø5,2 H3 32,5 5, G/4 5 2,5 40,5 4x Set 9,25x,

24 6/6 Bosch Rexroth G Industrial Hydraulics ype DB6D RE 25408/0.05 Unit dimensions (nominal dimensions in mm) 24 20,25 48 NG6 ISO M5x50 DIN (4x) H lock ,5 4x Ø5,2 H ,5 32,5 5, (M0) = 47 ±4,7 Nm Rexroth 43 max: reg: SI max: bar bar 4x Set 9,25x, Bosch Rexroth G Industrial Hydraulics Zum Eisengießer D-9786 Lohr am Main, Germany elefon +49(0) 9352/ 8-0 elefax +49(0)9352/ documentation@boschrexroth.de Bosch Rexroth G reserves all rights, including industrial property rights. We reserve all rights of disposal, such as copying and passing on to third parties. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he given information does not release the user from the obligation of own judgement and verification. It must be remembered that our products are subject to a natural process of wear and aging.

25 RE 25408/0.05 ype DB6D Industrial Hydraulics Bosch Rexroth G Notes Bosch Rexroth G Industrial Hydraulics Zum Eisengießer D-9786 Lohr am Main, Germany elefon +49(0) 9352/ 8-0 elefax +49(0)9352/ documentation@boschrexroth.de Bosch Rexroth G reserves all rights, including industrial property rights. We reserve all rights of disposal, such as copying and passing on to third parties. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he given information does not release the user from the obligation of own judgement and verification. It must be remembered that our products are subject to a natural process of wear and aging.

26 Bosch Rexroth G Industrial Hydraulics ype DB6D RE 25408/0.05 Notes Bosch Rexroth G Industrial Hydraulics Zum Eisengießer D-9786 Lohr am Main, Germany elefon +49(0) 9352/ 8-0 elefax +49(0)9352/ documentation@boschrexroth.de Bosch Rexroth G reserves all rights, including industrial property rights. We reserve all rights of disposal, such as copying and passing on to third parties. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he given information does not release the user from the obligation of own judgement and verification. It must be remembered that our products are subject to a natural process of wear and aging.

27 ressure relief valve, direct operated RE 2570-D/06.4 Replaces: /6 ype DBD SO56 Size 4 Component series X Maximum operating pressure 420 bar Maximum flow 20 l/min H7682 able of contents Contents age Features Ordering code 2 Function, section, symbol 2 echnical data 3 Characteristic curves 3 Unit dimensions 4 Mounting cavity 5 Features Screw-in cartridge It is used in applications with particularly high leak-tightness requirements Leakage-proof up to a maximum of 80% of the set opening pressure 2 adjustment types, optionally: setscrew with internal hexagon hand wheel Information on available spare parts:

28 2/6 Bosch Rexroth G Hydraulics DBD SO56 RE 2570-D/06.4 Ordering code DBD 4 K X V SO56 * ressure relief valve, direct operated = DBD djustment type Headless setscrew with internal hexagon = S Hand wheel = H Size 4 = 4 Screw-in cartridge = K Component series 0 to 9 = X (0 to 9: unchanged installation and connection dimensions) ressure rating Set pressure up to 50 bar = 50 Set pressure up to 00 bar = 00 Set pressure up to 200 bar = 200 Set pressure up to 35 bar = 35 Set pressure up to 420 bar = 420 Further details in the plain text Seal material V = FKM seals Observe compatibility of seals with hydraulic fluid used! (Other seals upon request) Cracking pressure e.g. 090 = Cracking pressure bar = set to cracking pressure = set and sealed to cracking pressure Function, section, symbol he pressure valve type DBD...SO56 is a direct operated pressure relief valve for the installation in block designs. It is used in applications with particularly high leak-tightness requirements for limiting a system pressure. he system pressure can be set via the adjustment type (4). In the initial position the valve is closed. he pressure in the main port acts on the spring plate (5) via the control line (2) and poppet (). If the pressure in the main port exceeds the value set at the compression spring (3), the poppet () opens and hydraulic fluid flows into the main port Symbol 2 = Main port () 2 = Main port 2 ()

29 RE 2570-D/06.4 DBD SO56 Hydraulics Bosch Rexroth G 3/6 echnical data (For applications outside these parameters, please consult us!) General Weight kg approx Installation position mbient temperature range C Hydraulic any Maximum operating pressure bar 420 Maximum flow l/min 20 Hydraulic fluid Mineral oil (HL, HL) according to DIN 5524; fast biodegradable hydraulic fluids according to VDM (see also RE 9022); HEG (rape seed oil); HEG (polyglycols); HEES (synthetic esters), other hydraulic fluids on request Hydraulic fluid temperature range C Viscosity range mm 2 /s Maximum admissible degree of contamination of the hydraulic fluid cleanliness class according to ISO 4406 (c) Class 20/8/5 ) ) he cleanliness classes stated for the components need to be maintained in hydraulic systems. Effective filtration prevents faults and at the same time increases the life cycle of the components. For the selection of the filters see Characteristic curves (measured with HL46, ϑ oil = 40 ±5 C) p E -q V -characteristic curves p-q V -characteristic curve Set pressure in bar ressure differential in bar Flow in l/min Flow in l/min he characteristic curves apply to output pressure = 0 in the total flow range! Definition cracking pressure: ressure in bar at q V = l/min

30 4/6 Bosch Rexroth G Hydraulics DBD SO56 RE 2570-D/06.4 Unit dimensions (dimensions in mm). djustment type "S", internal hexagon SW5.2 djustment type "H", hand wheel 2 Lock nut SW7 3 Hexagon SW7, tightening torque when screwing in M =23±2 Nm 4 Impressed type designation = Main port () 2 = Main port 2 () LS = Location shoulder

31 RE 2570-D/06.4 DBD SO56 Hydraulics Bosch Rexroth G 5/6 Mounting cavity R/DBD. 4K; 2 main ports, thread M4 x (dimensions in mm) min Ø32 3) Ø4,5H8 M4 x Ø3H9 E E Ø0,02 B Ø0,05 B B ØH8 E 25 2) Ø0,02 0,0 0,008- / t 20, +0, min max 7,8 Rzmax , ±0, 26 +0, 2 45 min 40 ) 0,02 B Rzmax 8 0,008- / t 20 0,008- / t ) 9-0,2 +0,2 4) Rz 32 = Main port () 2 = Main port 2 (), optionally arrange at the circumference LS = Location shoulder olerance for all angles ±0.5 ) Depth for moving parts 2) ll seal ring insertion faces are rounded and free of burrs 3) With countersink Standards: Workpiece edges DIN ISO 375 Form and position tolerance DIN EN ISO 0 General tolerance for DIN ISO 2768-mK metal-cutting procedures olerance DIN ISO 805 Surface condition DIN EN ISO 302 4) Visual inspection

32 6/6 Bosch Rexroth G Hydraulics DBD SO56 RE 2570-D/06.4 Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) 93 52/8-0 documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without consent of Bosch Rexroth G. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

33 RE 2570-D/06.4 DBD SO56 Hydraulics Bosch Rexroth G 7/6 Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) 93 52/8-0 documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without consent of Bosch Rexroth G. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

34 8/6 Bosch Rexroth G Hydraulics DBD SO56 RE 2570-D/06.4 Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) 93 52/8-0 documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without consent of Bosch Rexroth G. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

35 ressure relief valve, direct operated ype ZDBY D, Z2DBY D RE Edition: Replaces: 0.09 Size 6 Component series X Maximum operating pressure 35 bar Maximum flow 60 l/min tb0237 Features Contents Sandwich plate valve orting pattern according to ISO pressure ratings, optional 5 directions of action, optional With or 2 pressure valve cartridges 2 adjustment types, optionally: Sleeve with internal hexagon Lockable rotary knob with scale Features Contents Ordering code 2 Symbols 3 Function, section 3 echnical data 4 Characteristic curves 5, 6 Device dimensions 7 9 More information 0 RE 25722, edition: , Bosch Rexroth G

36 2/0 ZDBY D, Z2DBY D ressure relief valve Ordering code Z DB Y 6 D X / V / 60 * 0 Sandwich plate valve Z 02 pressure valve cartridge (only with version "" "B" and "") no code 2 pressure valve cartridges (only with version "C" and "D") 2 03 ressure relief valve DB 04 orting pattern according to ISO Y 05 Size Direct operated D 07 Relief function from - to: B and B B and B B C D 08 djustment type Sleeve with internal hexagon 2 Lockable rotary knob with scale (only version "80") ) 3 09 Component series 0 to 9 (0 to 9: unchanged installation and connection dimensions) X 0 ressure rating Set pressure up to 80 bar 80 Set pressure up to 60 bar 60 Set pressure up to 35 bar 35 Seal material FKM seals V (other seals upon request) ttention! Observe compatibility of seals with hydraulic fluid used! 2 orting pattern according to ISO Further details in the plain text ) H-key with the Material no. R is included in the scope of delivery. Notice! referred types and standard units are contained in the ES (standard price list). Bosch Rexroth G, RE 25722, edition:

37 ressure relief valve ZDBY D, Z2DBY D 3/0 Symbols ( = component side, 2 = plate side) Version "" Version "B" 2 B 2 B Version "" M 2 B Version "C" Version "D" 2 B 2 B Function, section ressure valves of type ZDBY and Z2DBY are direct operated pressure relief valves in sandwich plate design. hey are used for limiting a system pressure. he valves basically consist of the housing () and one or two pressure valve cartridges (2). he system pressure can be set via the adjustment type (3). In the initial position the valves are closed. he pressure in channel acts on the spool (4). If the pressure in channel exceeds the value set at the spring (5), the pilot poppet (6) opens. Hydraulic fluid flows from channel into channel. he pilot oil return from the spring chambers is implemented internally via channel. B M ype ZDBY 6 D2 2 B RE 25722, edition: , Bosch Rexroth G

38 4/0 ZDBY D, Z2DBY D ressure relief valve echnical data (For applications outside these parameters, please consult us!) general Weight Version "2" kg.4 Version "3" kg.8 Installation position any mbient temperature range C hydraulic Maximum operating pressure bar 35 Maximum counter pressure (port ) bar 60 Maximum set pressure bar 80; 60; 35 Maximum flow l/min 60 Hydraulic fluid see table below Hydraulic fluid temperature range C Viscosity range mm 2 /s Maximum permitted degree of contamination of the hydraulic fluid - cleanliness class according to ISO 4406 (c) Class 20/8/5 ) Hydraulic fluid Classification Suitable sealing materials Standards Mineral oils and related hydrocarbons HL, HL, HLD FKM DIN 5524 Bio-degradable insoluble in water HEG FKM VDM HEES FKM soluble in water HEG FKM VDM Important information on hydraulic fluids! For more information and data on the use of other hydraulic fluids refer to data sheet or contact us! here may be limitations regarding the technical valve data (temperature, pressure range, service life, maintenance intervals, etc.)! ) he cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and at the same time increases the service life of the components. For the selection of the filters see Bosch Rexroth G, RE 25722, edition:

39 ressure relief valve ZDBY D, Z2DBY D 5/0 Characteristic curves: Version "", "B", "" and "C" (measured with HL46, ϑ Oil = 40 ± 5 C) p-q V characteristic curves version "80" Operating pressure in bar Flow in l/min p-q V characteristic curves version "60" 80 Operating pressure in bar Flow in l/min p-q V characteristic curves version "35" Operating pressure in bar Flow in l/min RE 25722, edition: , Bosch Rexroth G

40 6/0 ZDBY D, Z2DBY D ressure relief valve Characteristic curves: Version "D" (measured with HL46, ϑ Oil = 40 ± 5 C) 40 p-q V characteristic curves version "80" Operating pressure in bar Flow in l/min p-q V characteristic curves version "60" Operating pressure in bar Flow in l/min 400 p-q V characteristic curves version "35" Operating pressure in bar Flow in l/min Bosch Rexroth G, RE 25722, edition:

41 B 40 = = ressure relief valve ZDBY D, Z2DBY D 7/0 Device dimensions: Version "" (dimensions in mm) max max F F4 5 7,5 4 x Ø5,2H3 G B F2 F ,0/00 Rzmax 4 Required surface quality of the valve contact surface component side orting pattern according to ISO (with locating hole Ø4 x 4 mm deep) 2 plate side orting pattern according to ISO (with locating hole Ø3 x 5 mm deep for locking pin ISO x8-St, material no. R , separate order) Name plate 2 djustment type "2" 3 djustment type "3" 4 Space required to remove the key 5 Valve mounting bores 6 Identical seal rings for ports, B,, (plate side) 7 Lock nut SW7, tightening torque M = 0 +5 Nm Valve mounting screws (separate order) 4 hexagon socket head cap screws ISO M5-0.9 Notice! Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve. RE 25722, edition: , Bosch Rexroth G

42 8/0 ZDBY D, Z2DBY D ressure relief valve Device dimensions: Version "B" and "" (dimensions in mm) 69 3 B 86 8 = = 2 4 max max ,5 20,5 F F4 G B F2 F3 4 x Ø5,2H ,0/00 Rzmax 4 Required surface quality of the valve contact surface component side orting pattern according to ISO (with locating hole Ø4 x 4 mm deep) 2 plate side orting pattern according to ISO (with locating hole Ø3 x 5 mm deep for locking pin ISO x8-St, material no. R , separate order) Name plate 2 djustment type "2" 3 djustment type "3" 4 Space required to remove the key 5 Valve mounting bores 6 Identical seal rings for ports, B,, (plate side) 7 Lock nut SW7, tightening torque M = 0 +5 Nm 8 Measuring port (only version "") Valve mounting screws (separate order) 4 hexagon socket head cap screws ISO M5-0.9 Notice! Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve. Bosch Rexroth G, RE 25722, edition:

43 B ressure relief valve ZDBY D, Z2DBY D 9/0 Device dimensions: Version "C" and "D" (dimensions in mm) max max x Ø5,2H max 2 F F4 7,5 G B F2 F3 B max ,0/00 Rzmax 4 Required surface quality of the valve contact surface component side orting pattern according to ISO (with locating hole Ø4 x 4 mm deep) 2 plate side orting pattern according to ISO (with locating hole Ø3 x 5 mm deep for locking pin ISO x8-St, material no. R , separate order) Name plate 2 djustment type "2" 3 djustment type "3" 4 Space required to remove the key 5 Valve mounting bores 6 Identical seal rings for ports, B,, (plate side) 7 Lock nut SW7, tightening torque M = 0 +5 Nm Valve mounting screws (separate order) 4 hexagon socket head cap screws ISO M5-0.9 Notice! Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve. RE 25722, edition: , Bosch Rexroth G

44 0/0 ZDBY D, Z2DBY D ressure relief valve More information Subplates Data sheet Hydraulic fluids on mineral oil basis Data sheet Reliability characteristics according to EN ISO 3849 Data sheet 0802 General product information on hydraulic products Data sheet ssembly, commissioning and maintenance of industrial valves Data sheet Selection of the filters Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone+49 (0) / 8-0 documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. Bosch Rexroth G, RE 25722, edition:

45 ressure relief valve ZDBY D, Z2DBY D /0 Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone+49 (0) / 8-0 documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. RE 25722, edition: , Bosch Rexroth G

46 2/0 ZDBY D, Z2DBY D ressure relief valve Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone+49 (0) / 8-0 documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. Bosch Rexroth G, RE 25722, edition:

47 ressure relief valve (ilot control valve) RE 25724/03.0 Replaces: 0.05 /8 ype (Z)DB/DZ Size 6 Component series X Maximum operating pressure 35 bar Maximum flow 3 l/min B 0240 ype ZDB able of contents Contents age Features Ordering code, symbols 2 Function, section 3 echnical data 4 Characteristic curve 4 Unit dimensions 5 to 7 Examples of application 8 Features Directly operated valve for the limitation of the system pressure pplication as pilot control valve For plate and control panel mounting Information on available spare parts:

48 2/8 Bosch Rexroth G Hydraulics (Z)DB / DZ RE 25724/03.0 Ordering code, symbols ype Material no. Examples of application Symbols DB G X/ DB G X/ For control panel DB G7 X/ DB X8 X/ DB X8 X/ DB X2 X/ DB X2 X/ Sandwich plate for DB X7 X/ subplate mounting DB X7 X/ DB X3 X/ DB X3 X/ DB X X/ DB X X/ ZDB X8 X/ ZDB X8 X/ ZDB X2 X/ Sandwich plate for ZDB X2 X/ subplate mounting ZDB X7 X/ ZDB X7 X/ ZDB X3 X/ ZDB X3 X/ ZDB X8 X/ ZDB X8 X/ For subplate mounting ZDB X2 X/ ZDB X2 X/ Low pressure High pressure DZ XB2 X/ DZ XB2 X/ ressure cut-off valve for subplate mounting B DZ X2 X/ DZ X2 X/ DZ X2 X/

49 RE 25724/03.0 (Z)DB / DZ Hydraulics Bosch Rexroth G 3/8 Function, section ype DB pressure relief valves are seat design remote control valves and allow for the limitation of the system pressure. he valve is adjusted manually by the adjusting device (4). he valves basically consist of housing (), valve poppet (2) and corresponding valve seat (3). In unloaded position, the valve poppet (2) applies pressure to the valve seat (3) locking the connection between and port. If the hydraulic force equals the force set at the adjusting element (4), the valve controls the set pressure. s the valve poppet (2) lifts off the valve seat (3), the excess pressure fluid can flow off from to. If the spring (5) is completely without load, a minimal pressure of 3 bar (spring pretensioning force) is reached. hese valves are basically used as pilot control valves for the indirect control of major flow. ype DB-X2-X

50 4/8 Bosch Rexroth G Hydraulics (Z)DB / DZ RE 25724/03.0 echnical data general Installation position ny Storage temperature range C mbient temperature range C Weight kg 2.0 hydraulic (measured with HL 46; J oil = 40 C ± 5 C, ν = 35 mm 2 /s) Maximum operating ort bar 350 pressure Maximum set ressure rating 60 bar bar 60 (only possible for type DZ) pressure ressure rating 60 bar bar 60 ressure rating 35 bar bar 35 ressure rating 350 bar bar 350 Minimal set pressure bar 3 Return flow ort bar Separately depressurized to the tank Maximum flow l/min 3 Hydraulic fluid Mineral oil (HL, HL) according to DIN 5524 Other hydraulic fluids upon request! Hydraulic fluid temperature range C Viscosity range mm 2 /s Max admissible degree of contamination of the hydraulic Class 20/8/5 ) fluid - cleanliness class according to ISO 4406 (c) Hysteresis % < 5 of the max. set pressure Control oil volume (V x ) (only pressure on/off valves) cm 3 < 0,5 ) he cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and at the same time increases the service life of the components. For the selection of filters, see data sheets 50070, 50076, 5008, 50086, and Characteristic curve (measured with HL 46; J oil = 40 C ± 5 C, ν = 35 mm 2 /s) 20 Δp = f (q V ) ressure differential in bar Flow in l/min

51 RE 25724/03.0 (Z)DB / DZ Hydraulics Bosch Rexroth G 5/8 Unit dimensions (dimensions in mm) ype DB-G-X/ ø24 ø23 G /4 5,5 G 3 /8 ø45 R ø64 ø44 4 xø6, , ,5 40 ø57 ø73 Hand wheel 2 Rotary knob 3 Valve mounting bores 4 ressure gauge connection 5 Lock nut Valve mounting screws (separate order) 4 M6 hexagon socket head cap screws Screw length as required

52 6/8 Bosch Rexroth G Hydraulics (Z)DB / DZ RE 25724/03.0 Unit dimensions (dimensions in mm) ype DB-X... ype ZDB-X... 4, , ,25 8 0,0/00 F F 2 Rt 4 47 Required surface quality of the valve mounting face F 4 F 3 Name plate or second flange surface 2 djustment type 3 Lock nut 4 Valve mounting bores 5 O-rings Ø9.25 x.78 (, ports) 6 Machined valve mounting face, porting pattern according to ISO Subplates according to data sheet (separate order) 72 Valve mounting screws (separate order) ype DB 4 hexagon socket head cap screws ISO 4762-M5x flZn-240h-L (friction coefficient µ total = ); ightening torque M = 7 Nm ±0 % or 4 hexagon socket head cap screws ISO 4762-M5x (friction coefficient µ total = ); ightening torque M = 8.9 Nm ±0 % ype ZDB 4 hexagon socket head cap screws ISO 4762-M5-0.9-flZn-240h-L (friction coefficient µ total = ); ightening torque M = 7 Nm ±0 % or 4 hexagon socket head cap screws ISO 4762-M5-0.9 (friction coefficient µ total = ); ightening torque M = 8.9 Nm ±0 % Screw length as required

53 RE 25724/03.0 (Z)DB / DZ Hydraulics Bosch Rexroth G 7/8 Unit dimensions (dimensions in mm) ype DZ-X B ø25 8,25 2, B ,0/00 F F 2 Rt 4 47 B F 4 F 3 Required surface quality of the valve mounting face 72 Name plate 2 djusting element 3 Lock nut 4 Valve mounting bores 5 ressure gauge connection for control pressure X, G/4 6 ressure gauge connection for system pressure, G/4 7 O-rings Ø0 x.5 (ports,, B, ) 8 Machined valve mounting face, porting pattern according to ISO Subplates according to data sheet (separate order) Valve mounting screws (separate order) 4 hexagon socket head cap screws ISO 4762-M5x flZn-240h-L (friction coefficient µ total = ); ightening torque M = 7 Nm ±0 % or 4 hexagon socket head cap screws ISO 4762-M5x (friction coefficient µ total = ); ightening torque M = 8.9 Nm ±0 % Screw length as required

54 8/8 Bosch Rexroth G Hydraulics (Z)DB / DZ RE 25724/03.0 Examples of application ressure release, electric lternative Remote control 2 pressure ratings lternative 2. ressure range Block installation valves ressure release and 2 pressure stages Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) / 8-0 Fax +49 (0) / documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

55 ressure relief valve, pilot operated RE 2573/0.05 Replaces: /8 ype DB. K Nominal sizes 6 and 0 Component series 4X Maximum operating pressure 35 bar Maximum flow 60 l/min (NS6) 00 l/min (NS0) K4278- Overview of contents Merkmale Features Ordering details 2 referred types 2 Function, section, symbol 3 echnical data 3 Characteristic curves 4 Unit dimensions NS6 5 Cavity NS6 6 Unit dimensions NS0 7 Cavity NS0 8 Features Cartridge valve 4 pressure stages 4 adjustment types, optional: Rotary knob Sleeve with hexagon and protective cap Lockable knob with scale Rotary knob with scale For information regarding the available spare parts see:

56 2/8 Bosch Rexroth G Hydraulics DB. K RE 2573/0.05 Ordering details DB K 4X Y V * ressure relief valve, pilot operated = DB Nominal size 6 = 6 Nominal size 0 = 0 Cartridge valve = K djustment type Rotary knob = Sleeve with hexagon and protective cap = 2 Lockable rotary knob with scale = 3 ) Rotary knob with scale = 7 Component series 40 to 49 = 4X (40 to 49: unchanged installation and connection dimensions) ) H key with material No. R is included within the scope of supply. Y = Futher details in clear text Seal material V = FKM seals (other seals on request) ttention! he compatibility of the seals and pressure fluid is to be taken into account! Internal pilot oil supply, External pilot oil drain ressure stage 50 = Settable pressure up to 50 bar 00 = Settable pressure up to 00 bar 200 = Settable pressure up to 200 bar 35 = Settable pressure up to 35 bar referred types Nominal size 6 Nominal size 0 ype Material No. ype Material No. DB 6 K2-4X/50YV R DB 0 K2-4X/50YV R DB 6 K2-4X/00YV R DB 0 K2-4X/00YV R DB 6 K2-4X/200YV R DB 0 K2-4X/200YV R DB 6 K2-4X/35YV R DB 0 K2-4X/35YV R Further preferred types and standard components can be found within the ES (Standard rice List).

57 RE 2573/0.05 DB. K Hydraulics Bosch Rexroth G 3/8 Function, section, symbol ressure valves type DB..K.. are pilot operated pressure relief valves for installation in manifolds. hey are used to limit the pressure in a hydraulic system. Setting of the system pressure is via adjustment element (4). t rest, the valves are closed. ressure in the main port acts on the spool (). t the same time, pressure is passed through orifice (2) onto the spring loaded side of the spool () and through orifice (3) to the pilot poppet (6). If the pressure in main port rises above the value set at spring (5), then the pilot poppet opens (6). ressure fluid can now flow from the spring loaded side of the spool (), through the orifice (3) and channel (7) into main port 3. he resulting pressure drop moves piston () causing this to open the main port from to 2, whilst the pressure set at spring (5) is maintained. ilot oil drain from the two spring chambers is taken externally via main port 3. Note! Back pressures (main port 3) are added to the set pressure = Main port () ype DB 0 K2-4X/.YV = Main port 2 () 3 = Main port 3 (Y) echnical data (for applications outside these parameters, please consult us!) General Nominal size 6 0 Weight kg pprox. 0.5 pprox. 0.2 Installation Optional mbient temperature range C 20 to +80 Hydraulic Max. operating pressure ) Main port () bar 35 Max. settable pressure Main port () bar 50; 00; 200; 35 Max. permissible back pressure ) Main port 2 () bar 35 Main port 3 (Y) bar 35 Maximum flow l/min ressure fluid ressure fluid temperature range C 20 to +80 Viscosity range mm 2 /s 0 to 800 Maximum permissible degree of pressure fluid contamination Cleanliness class to ISO 4406 (c) Mineral oil (HL, HL) to DIN 5524; fast bio-degradable pressue fluids to VDM (also see RE 9022); HEG (rape seed oil); HEG (polyglycole); HEES (synthetic ester); other pressure fluids on request Class 20/8/5 2) ) ttention! he maximum operating pressure results from the sum of the set pressure and the back pressure! 2) he cleanliness class stated for the components must be adhered to in hydraulic systems. Effective filtration prevents faults from occurring and at the same time increases the component service life. For the selection of filters see data sheets RE 50070, RE 50076, RE 5008, RE and RE

58 4/8 Bosch Rexroth G Hydraulics DB. K RE 2573/0.05 Characteristic curves NS6 (measured with HL46, ϑ oil = 40 C ± 5 C) p E -q V -characteristic curves p E min -q V -characteristic curves Settable pressure in bar Min. settable pressrue in bar Flow in l/min Flow in l/min ttention! he characteristic curves are valid for an outlet pressure = zero over the entire flow range! Characteristic curves NS0 (measured with HL46, ϑ oil = 40 C ± 5 C) p E -q V -characteristic curves p E min -q V -characteristic curves Settable pressure in bar Min. settable pressure in bar Flow in l/min Flow in l/min ttention! he characteristic curves are valid for an outlet pressure = zero over the entire flow range!

59 RE 2573/0.05 DB. K Hydraulics Bosch Rexroth G 5/8 Unit dimensions NS6 (nominal dimensions in mm) 60 max max max 7 3 LS 0 42, djustment type "" 2 djustment type "2" 3 djustment type "3" 4 djustment type "7" 5 Space required to remove the key 6 Locknut 24/F 7 Hexagon 0/F 8 Key width 24/F, tightening torque M = 50 Nm = Main port () 2 = Main port 2 () 3 = Main port 3 (Y) LS = Location Shoulder

60 6/8 Bosch Rexroth G Hydraulics DB. K RE 2573/0.05 Cavity NS6; 3 main ports; thread M20 x (nominal size in mm) Rz 8 25 Rz 6 2,5 H8 20,5 H8 M20 x 7,5 H8 C B 0,0 B C D D Rz 8 Rz 6 LS 0 min ) ,2 8 +0, 3 2 max ,3 30 0,3 Rz 6 Rz 8 = Main port () 2 = Main port 2 (), location; optional about the circumference 3 = Main port 3 (Y) LS = Location Shoulder ) Depth of fit

61 RE 2573/0.05 DB. K Hydraulics Bosch Rexroth G 7/8 Unit dimensions NS0 (nominal dimensions in mm) 4 max max max LS 0 49, djustment type "" 2 djustment type "2" 3 djustment type "3" 4 djustment type "7" 5 Space required to remove the key 6 Locknut 24/F 7 Hexagon 0/F 8 Hexagon 30/F, tightening torque M = 50 Nm = Main port () 2 = Main port 2 () 3 = Main port 3 (Y) LS = Location Shoulder

62 8/8 Bosch Rexroth G Hydraulics DB. K RE 2573/0.05 Cavity NS0; 3 main ports; thread M20 x (nominal dimensions in mm) Rz H8 25 H8 M24 x 23 H9 20 H8 B C 0,0 B C D LS 0 Rz 8,2 +0, D 42 +0,2 35,5±0,5 3 +0,2 2 +0,2 9,5±0, ) 0 +0, 2 max 0 Rz 8 Rz 6 20 = Main port () 2 = Main port 2 (), location: optional about the circumference 3 = Main port 3 (Y) LS = Location Shoulder ) Depth of fit Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany elefon +49 (0) / 8-0 elefax +49 (0) / documentation@boschrexroth.de his document, as well as the data, specifications and other informations set forth in it, are the exclusive property of Bosch Rexroth G. Without their consent it may not be reproduced or given to third parties. he data specified above only serves to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he details stated do not release you from the responsibility for carrying out your own assessment and verification. It must be remembered that our products are subject to a natural process of wear and ageing.

63 RE M/09.00 RE M/09.00 ressure relief valve of sandwich plate design, pilot operated, sea water resistant ypes ZDB 6 J and Z2DB 6 J Series 4X Features of the sea water resistant version When compared to the standard version the following modifications have been carried out: he external metal components have been zinc galvanised: housing; for the pressure relief valve type DB6K J which is screwed into the housing, see RE M. Sea water resistance is identified by the code J in the ordering code. Note: Valve fixing screws must be ordered separately: 4 off M5, DIN C or NEL ) ; M = 8.9 Nm; order in clear text, length details as required. ) he code NEL stands for non-electrolytically applied zinc coatings which contain a lubrication additive for the reduction of friction in accordance with ISO/WD Colour: silver. Further information can be obtained from the standard documentation RE Ordering details, preferred types Z DB 6 2 4X/ J * Sandwich plate = Z Enter only for versions VC and VD: with 2 pressure valve cartridges = 2 ressure relief valve = DB Nominal size 6 = 6 Relief function from to: = V = V B = VB and B = VC B and B = VD djustment: Sleeve with hexagon and protective cap = 2 No code = NBR seals V = FKM seals J = Sea water resistant 50 = Settable pressure up to 50 bar 00 = Settable pressure up to 00 bar 200 = Settable pressure up to 200 bar 35 = Settable pressure up to 35 bar 4X = Series 40 to 49 (40 to 49: unchanged installation and connection dimensions) ZDB 6...J; Z2DB 6...J /2

64 RE M/09.00 referred types referred types referred types ype Material number ype Material number ZDB 6 V2-4X/200JV ZDB 6 V2-4X/35JV ZDB 6 V2-4X/200JV ZDB 6 V2-4X/35JV Z2DB 6 VC2-4X/35J Z2DB 6 VC2-4X/35JV Z2DB 6 VD2-4X/200JV Z2DB 6 VD2-4X/35JV Mannesmann Rexroth G Rexroth Hydraulics D-9783 Lohr am Main Jahnstraße 3-5 D-9786 Lohr am Main elefon / 8-0 elefax / elex product.support@rexroth.de Internet Mannesmann Rexroth Limited Cromwell Road, St Neots, Cambs, E9 2ES el: / Fax: / info@rexroth.co.uk he specified data is for product description purposes only and may not be deemed to be guaranteed unless expressly confirmed in the contract. ll rights reserved Subject to revision 2/2 ZDB 6...J; Z2DB 6...J

65 ressure relief valve, pilot operated RE 2576/05. Replaces: /0 ype ZDB and Z2DB Size 0 Component series 4X Maximum operating pressure 35 bar [4600 psi] Maximum flow 00 l/min [26.4 US gpm] H7747 able of contents Contents age Features Ordering code 2 Symbols 3 Function, section 4 echnical data 5 Characteristic curves 6 Unit dimensions 7 to 0 Features Sandwich plate valve orting pattern according to ISO and NF 3.5. R D05 4 pressure ratings 6 circuit options With or 2 pressure valve cartridges 4 adjustment types for pressure adjustment, optional: Rotary knob Bushing with hexagon and protective cap Lockable rotary knob with scale Rotary knob with scale Information on available spare parts:

66 2/0 Bosch Rexroth G Hydraulics ZDB; Z2DB RE 2576/05. Ordering code Z DB 0 4X * Sandwich plate = Z pressure valve cartridge = No code (Only with version "V", "VB", "V" and "V") 2 pressure valve cartridges = 2 (Only with version "VC" and "VD") ressure relief valve = DB Size 0 = 0 Relief function from - to: = V = V B 2 = V B B = VB and B B = VC B and B = VD ) H-key with Material no. R is included in the delivery Note! o port X and Y bored according to ISO (e.g. for pilot operated directional valve size 0), version "SO30" at the end of the ordering code applies! Further details in the plain text Seal material No code = NBR seals V = FKM seals (other seals upon request) ttention! Observe compatibility of seals with hydraulic fluid used! 50 = Setting pressure up to 50 bar [725 psi] 00 = Setting pressure up to 00 bar [450 psi] 200 = Setting pressure up to 200 bar [2900 psi] 35 = Setting pressure up to 35 bar [4600 psi] 4X = Component series 40 to 49 (40 to 49: Identical installation and connection dimensions) djustment type for pressure adjustment = Rotary knob 2 = Bushing with hexagon and protective cap 3 = Lockable rotary knob with scale ) 7 = Rotary knob with scale Standard types and standard units are contained in the ES (standard price list).

67 RE 2576/05. ZDB; Z2DB Hydraulics Bosch Rexroth G 3/0 Symbols ( = component side, 2 = plate side) ype ZDB 0 V ype ZDB 0 VB 2 B B 2 B B ype ZDB 0 V ype ZDB 0 V 2 B B 2 B B ype Z2DB 0 VC ype Z2DB 0 VD 2 B B 2 B B Note! Deviating from ISO 440, port is in this data sheet called, port is called B.

68 4/0 Bosch Rexroth G Hydraulics ZDB; Z2DB RE 2576/05. Function, section ressure valves of type ZDB and Z2DB are pilot operated pressure relief valves in sandwich plate design. hey are used for limiting a system pressure. he valves basically consist of a housing (7) and one or two pressure valve cartridges. he system pressure can be set via the adjustment type (4). In the initial position the valves are closed. he pressure in channel acts on the spool (). t the same time, the pressure is applied to the spring-loaded side of the spool () via nozzle (2) and to the pilot poppet (6) via nozzle (3). If the pressure in channel exceeds the value set at the spring (5), the pilot poppet (6) opens. Hydraulic fluid flows from the spring-loaded side of the spool (), nozzle (3) and channel (8) into the channel (). he resulting pressure drop moves the spool () and opens the connection to (). In channel, the pressure set at the spring (5) is set B B ype ZDB 0 V2-4X/ V B B 2 = component side 2 = plate side

69 RE 2576/05. ZDB; Z2DB Hydraulics Bosch Rexroth G 5/0 echnical Data (For applications outside these parameters, please consult us!) general Weight ype ZDB kg [lbs] pprox. 2.4 [5.3] hydraulic ype Z2DB kg [lbs] pprox. 2.6 [5.7] Maximum operating pressure bar [psi] 35 [4600] Maximum setting pressure bar [psi] 50 [725]; 00 [450]; 200 [2900]; 35 [4600] Maximum flow l/min [US gpm] 00 [26.4] Hydraulic fluid See table below Hydraulic fluid temperature range C [ F] 20 to +80 [ 4 to +76] Viscosity range mm 2 /s [SUS] 0 to 800 [60 to 370] Maximum permitted degree of contamination of the hydraulic fluid - Class 20/8/5 ) cleanliness class according to ISO 4406 (c) Hydraulic fluid Classification Suitable sealing materials Standards Mineral oils and related hydrocarbons HL, HL, HLD NBR, FKM DIN 5524 HEG NBR, FKM Environmentally Insoluble in water HEES FKM compatible ISO 5380 Soluble in water HEG FKM ISO 5380 Water-free HFDU, HFDR FKM ISO 2922 Flame-resistant HFC (Fuchs Hydrotherm 46M, Water-containing etrofer Ultra Safe 620) NBR ISO 2922 Important information on hydraulic fluids! For more information and data on the use of other hydraulic fluids refer to data sheet or contact us! Flame-resistant water-containing: Maximum operating pressure 20 bar Maximum hydraulic fluid temperature 60 C Expected service life as compared to HL hydraulic oil here may be limitations regarding the technical valve 30 % to 00 % data (temperature, pressure range, service life, maintenance intervals, etc.)! ) he cleanliness classes stated for the components need to be maintained in hydraulic systems. Effective filtration prevents faults and at the same time increases the service life of the components. For the selection of the filters see

70 6/0 Bosch Rexroth G Hydraulics ZDB; Z2DB RE 2576/05. Characteristic curves (measured with HL46, ϑ Oil = 40 ± 5 C [04 ± 9 F]) p E -q V characteristic curves p E min -q V characteristic curves Setting pressure in bar [psi] [5076] [4000] [3000] [2000] [000] [0] Minimum setting pressure in bar [psi] [363] [300] [250] [200] [50] [00] [50] [0] [0] [5] [0] [5] [20] [26.4] Flow in l/min [US gpm] [0] [5] [0] [5] [20] [26.4] Flow in l/min [US gpm] he characteristic curves apply to the pressure at the valve output p = 0 bar across the entire flow range. VD ( to B) 2 V 3 VB, VC, V 4 V, VD (B to )

71 RE 2576/05. ZDB; Z2DB Hydraulics Bosch Rexroth G 7/0 Unit dimensions: ype ZDB 0 V, V and V (dimensions in mm [inch]) 8 [0.7] L L2 L3 H H 32 [.26] ,5 [0.059] 50 [.969] 48,5 [.909] [ 0.68] 5,7 2 [ 0.8] [0.059],5 30 L4 L7 L F F2 B2 [.378] 5[2.008] B B B 35 B3 F4 F3 9 4 L5 2 [0.47] 7 4 x 6,7 [ 0.264] 2 [0.0787] Item explanations and valve mounting screws see page 0. Notes! o port X and Y bored according to ISO (e.g. for pilot operated directional valve size 0), version "SO30" at the end of the ordering code applies! Deviating from ISO 440, port is in this data sheet called, port is called B. 0,0/00 [0.0004/4.0] Rzmax 4 Required surface quality of the valve mounting face ype B B2 B3 H L L2 L3 L4 L5 L6 L7 V and V 69 [2.72] V 70 [2.76].5 [0.45] 2 [0.47] 20.7 [0.82] 27 [.06] 26 [.02] 25 [0.98] 227 [8.94] 28 [8.58] 203 [7.99] 94 [7.64] 7 [4.6] 05 [4.3] 57.6 [2.27] 60.9 [2.40] 50.3 [.98] 53.6 [2.] 4 [0.6] 0.7 [0.027] 45.5 [.79] 32.5 [.28]

72 8/0 Bosch Rexroth G Hydraulics ZDB; Z2DB RE 2576/05. Unit dimensions: ype ZDB 0 VB (dimensions in mm [inch]) 7 [4.606] 227 [8.94] 8 [0.7] 203 [7.99] [.969],5 [0.059] [.26] 26 [.024] 2 0,5 [ 0.43] [.8] [0.453] 8,5 [0.728] 4 [0.57] 58 [2.28],5 F F [2.77] [0.85] 20,7 B B 5 [2.0] 35 [.378] F4 F3 2 [0.47] 9 2 [0.0787] 4 x 6,7 [ 0.264] [.] [.97] 7 Item explanations and valve mounting screws see page 0. Notes! o port X and Y bored according to ISO (e.g. for pilot operated directional valve size 0), version "SO30" at the end of the ordering code applies! Deviating from ISO 440, port is in this data sheet called, port is called B. 0,0/00 [0.0004/4.0] Rzmax 4 Required surface quality of the valve mounting face

73 3 RE 2576/05. ZDB; Z2DB Hydraulics Bosch Rexroth G 9/0 Unit dimensions: ype Z2DB 0 VC and VD (dimensions in [inch]) [3.23] 8 L2 L L3 8 [0.7] L4 L5 [0.7] ,5 26 0,5 5,7 L6 5 0 L7 30 [.8] [.024] 50 [.969] [ 0.43] [ 0.68] 2 [0.059] [.378] 5 L8 [0.47] 2 5 [2.0] 33 L0 F F4 [.299] B 4 x 6,7 [ 0.264] F2 F3 L 7 B L9 20,7 [0.465] [2.74] [0.8],8 69,5 3 2 [0.0787] 2 8 Item explanations and valve mounting screws see page 0. Notes! o port X and Y bored according to ISO (e.g. for pilot operated directional valve size 0), version "SO30" at the end of the ordering code applies! Deviating from ISO 440, port is in this data sheet called, port is called B. 0,0/00 [0.0004/4.0] Rzmax 4 Required surface quality of the valve mounting face ype L L2 L3 L4 L5 L6 L7 L8 L9 L0 L VC 23 [4.84] VD 32 [5.20] [4.37] 07 [4.20] 2 [4.40] 2 [4.40] 89 [3.50] 85 [3.30] 90 [3.54] 90 [3.54] 59 [2.32] 56 [2.20] 60 [2.36] 56 [2.20] 52 [2.05] 49 [.93] 53 [2.09] 49 [.93] 2 [0.08] 6 [0.24] [0.04] 6 [0.24]

74 0/0 Bosch Rexroth G Hydraulics ZDB; Z2DB RE 2576/05. Unit dimensions Name plate 2 djustment type "" 3 djustment type "2" 4 djustment type "3" 5 djustment type "7" 6 Dimensions required to remove the key 7 Valve mounting bores 8 Lock nut SW24 9 Hexagon SW0 0 Identical seal rings for ports, B,,, B (plate side) Sealing plate 80 x 70 x.5 [2.76 x 3.5 x 0.06] (only with version "V" and "V") 2 Counterbore (only with version "V") 3 Version "V" and "V" 4 Version "V" 5 Hexagon SW30, tightening torque M = 50 Nm [36.8 ft-lbs] Valve mounting screws (separate order) 4 hexagon socket head cap screws metric ISO M6-0.9-flZn-240h-L 4 hexagon socket head cap screws /4-20 UNC Note! Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve. 2 Component side porting pattern according to ISO and NF 3.5. R D05 Component side porting pattern according to ISO and NF 3.5. R D05 Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) / 8-0 Fax +49 (0) / documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

75 RE 2576/05. ZDB; Z2DB Hydraulics Bosch Rexroth G /0 Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) / 8-0 Fax +49 (0) / documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

76 2/0 Bosch Rexroth G Hydraulics ZDB; Z2DB RE 2576/05. Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) / 8-0 Fax +49 (0) / documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

77 /2 ressure relief valve, pilot operated RE XC-B2/0.07 ype DB...5X/...XC Nominal sizes (NG) 0, 20, 30 Unit series 5X Maximum operating pressure 350 bar B007 EX units For potentially explosive atmospheres art II echnical Data Sheet Information on explosion protection: Range of application in accordance with the Explosion rotection Directive and type of protection Range of application as per Directive RL 94/9/EG IM2, II2G, II2D ype of protection of valve: c (EN :200-0) What you need to know about these Operating Instructions hese Operating Instructions apply to the explosion-proof version of Rexroth valves, and consist of the following three parts: art I General Information RE 0700-X-B art II echnical Data Sheet RE XC-B2 Mat. No. R art III roduct-specific Instructions RE XC-B3 You can find further information on the correct handling of Rexroth hydraulic products in our publication General roduct Information for Hydraulic roducts, RE

78 2/2 Bosch Rexroth G Hydraulics DB...5X/...XC RE XC-B2 Overview of Contents Contents age Features 2 Ordering data and scope of delivery 3 Function, sectional diagram, symbols 4 echnical data 5 Information on explosion protection 5 Characteristic curves 6, 7 Unit dimensions 8 0 Solenoid-operated relief, 2 Features For subplate mounting, mounting hole configuration to: ISO 6264-R (NG0), ISO 6264-S (NG20), ISO (NG30) For threaded connection ype of adjustment: rotary knob 5 pressure stages Subplates (see page 0) Note: By adding an additional type 3WE 6 spool-type directional control valve, you can expand the valve in such a way that it can feature solenoid-operated relief (see pages and 2).

79 RE XC-B2 DB...5X/...XC Hydraulics Bosch Rexroth G 3/2 Ordering data and scope of delivery DB 5X XC V ilot operated pressure relief valve Nominal size (NG) = 0, 20, 30 ype of connection Valve for subplate mounting = Valve for threaded connection = G ype of adjustment Rotary knob = With main piston Ø24 mm (NG0, NG20) = With main piston Ø28 mm (NG30 only) = N Unit series 50 to 59 = 5X (50 to 59: installation and connection dimensions unchanged) Set pressure up to 50 bar = 50 Set pressure up to 00 bar = 00 Set pressure up to 200 bar = 200 Set pressure up to 35 bar = 35 Set pressure up to 350 bar = 350 V = FKM seals Note: ake compatibility of seals and pressure fluid into account! XC = Valve in explosion-proof design, see information on explosion protection, page 5 for details No code = Standard version U = Valve for minimum opening pressure (only possible up to pressure stage 35 bar) Control oil flow = Internal control oil supply and return X = External control oil supply, internal return Y = Internal control oil supply, external return XY = External control oil supply and return Included in scope of delivery: Valve operating instructions

80 4/2 Bosch Rexroth G Hydraulics DB...5X/...XC RE XC-B2 Function, sectional diagram, symbols DB type valves are pilot operated pressure relief valves and are used to limit the operating pressure. hey basically consist of the main valve () with main piston cartridge (3), the pilot valve (2) and the sealing plate (6). he available pressure in channel acts on the main piston (3). t the same time, the pressure is applied to the spring-loaded end of the main piston (3) and to the ball (8) in the pilot valve (2) via the control lines (6) and (7), which are equipped with nozzles (4). If the pressure in channel rises above the value set at the spring (9), the ball (8) opens against the spring (9). he signal that triggers this arrives internally from channel vial the control lines (0) and (6). he pressure fluid at the spring-loaded end of the main piston (3) now flows through the control line (7), nozzle hole () and ball (8) into the spring chamber (2). From here, it is conveyed to the tank internally via control line (3) in the DB - type valve, and externally via control line (4) in the DB Y type valve. he nozzles (4) and (5) lead to a drop in pressure at the main piston (3), so that the connection from channel to channel is now free. he pressure fluid now flows from channel to channel, and the set operating pressure is maintained. he pressure relief valve can be relieved from pressure or switched to a different pressure (second pressure stage) via the port X (5). ype DB 0 XC X 5 0 ype DB ype DB X ype DB Y ype DB XY X Y X Y Note: Hydraulic counter pressures in port with an internal control oil return or in port Y with an external control oil return are added in the ratio of : to the response pressure of the valve that is set in the pilot control. Example: ressure setting of valve through spring pre-tension (item 2) in the pilot valve/setting unit. p spring = 200 bar Hydraulic counter pressure in port with internal control oil return p hydraulic = 50 bar => response pressure = p spring + p hydraulic = 250 bar

81 RE XC-B2 DB...5X/...XC Hydraulics Bosch Rexroth G 5/2 echnical data General Nominal size NG0 NG20 NG30 Installation position Optional mbient temperature range C Storage temperature range C Weight Subplate mounting DB kg hreaded connection DB G kg Surface protection Standard aint, layer thickness max. 00 μm Hydraulic Maximum working pressure orts, X bar 350 ort bar 35 Maximum counter ort Y (DB) bar 35 pressure orts Y, (with spool-type directional control valve) bar See echnical Data Sheets listed in table on page Maximum set pressure ) bar 50; 00; 200; 35; 350 Minimum set pressure ) Dependent on flow rate (see characteristic curves on page 6) Maximum flow rate Subplate mounting l/min hreaded connection l/min ressure fluid Mineral oil (HL, HL) to DIN 5524, rapidly biodegradable pressure fluids to VDM (also see RE 9022), HEG (rapeseed oil); HEG (polyglycols); HEES (synthetic ester) Ignition temperature > 80 C ressure fluid temperature range C Viscosity range mm 2 /s Maximum permissible degree of contamination of pressure fluid urity class to ISO 4406 (c) Class 20/8/5 2) Information on explosion protection Range of application as per Directive RL 94/9/EG IM2, II2G II2D ype of protection of valve c (EN :200-0) c (EN :200-0) Maximum surface temperature 3) C 5 emperature class 4 Degree of protection I 65 ) In order to prevent the maximum permitted response pressure from being exceeded in the system, it must be checked with a suitable measuring instrument during the setting process. 2) he purity classes stated for the components must be complied with in hydraulic systems. Effective filtration prevents problems and also extends the service life of components. For a selection of filters, see echnical Data Sheets RE 50070, RE and RE ) s high surface temperatures may occur, European standards EN 563 and EN 982 on the prevention of accidental contact must be observed.

82 6/2 Bosch Rexroth G Hydraulics DB...5X/...XC RE XC-B2 Characteristic curves (measured with HL46, oil = 40 C ± 5 C) Standard version Minimum set pressure and circulating pressure as a function of the flow rate ) 2 2 Minimum set pressure, circulating pressure in bar NG0 2 NG20 3 NG Flow rate in l/min Version U Minimum set pressure and circulating pressure as a function of the flow rate ) 2 2 Minimum set pressure, circulating pressure in bar NG0 2 NG20 3 NG Flow rate in l/min Important! he characteristic curves were measured with external, non-pressurized control oil return. If the control oil return is internal, the inlet pressure increases by the amount of outlet pressure at port. ) he curves apply to outlet pressure p = 0 over the entire flow range!

83 RE XC-B2 DB...5X/...XC Hydraulics Bosch Rexroth G 7/2 Characteristic curves (measured with HL46, oil = 40 C ± 5 C) 400 Inlet pressure as a function of the flow rate Inlet pressure in bar NG0 2 NG20 3 NG30 Flow rate in l/min Important: he characteristic curves were measured with external, non-pressurized control oil return. If the control oil return is internal, the inlet pressure increases by the amount of outlet pressure at port. Control oil flow rate in l/min Control oil flow rate 2,0,8 2 3,6,4,2,0 0,8 0,6 0,4 0, Flow rate in l/min NG0 2 NG20 3 NG30

84 8/2 Bosch Rexroth G Hydraulics DB...5X/...XC RE XC-B2 Unit dimensions: Subplate mounting (nominal dimensions in mm) ype DB. XC See page 0 for legend to item numbers Y 98 26,3 2,3 20 Ø39,5 8 G/4; 2 G/4; ,0/00mm Rzmax 4 2 M8 x ; 0 5 L9 X 49 Ø max. 5 Required surface quality of mating component L8 L7 L5 L6 ØD 6 B B2 X L4 L3 5 L L2 yp L L2 L3 L4 L5 L6 L7 L8 L9 B B2 ØD DB DB DB

85 RE XC-B2 DB...5X/...XC Hydraulics Bosch Rexroth G 9/2 Unit dimensions: hreaded connection (nominal dimensions in mm) ype DB.G XC G/4; max See page 0 for legend to item numbers Y Ø39,5 34 Ø25 G/4; 2 X 5,5 D ØD D ØD Ø72 26,3 2, ype D ØD2 DB 0 G G/ DB 5 G G3/ DB 20 G G 47 8 DB 25 G G / DB 30 G G /

86 0/2 Bosch Rexroth G Hydraulics DB...5X/...XC RE XC-B2 Unit dimensions: Legend to item numbers Nameplate 2 ort X for external control oil supply 3 ort Y for external control oil return 4 ype of adjustment 5 Dowel pin 6 Valve mounting bore 7 Not present with internal control oil return 8 est port 9 Lock nut (SW7) 0 Lock nut (SW7) Cover plate 2 Sealing plate Subplates as per echnical Data Sheed RE (order separately) Valve type ype Mat. no. DB 0 G 546/0 FE/ZN (G/2) R DB 20 G 409/0 FE/ZN (G) R DB 30 G 4/0 FE/ZN (G /2) R Valve fastening bolts for subplate-mounted valves (order separately) In order to ensure a secure connection, use only the following valve fastening bolts: ype DB 0 4 x ISO 4762-M2x flZn-240h-L (coefficient of friction μ tot = ) Material No. R ype DB 20 4 x ISO 4762-M6x flZn-240h-L (coefficient of friction μ tot = ) Material No. R ype DB 30 4 x DIN 92-M8x Material No. R Valve fastening bolts for threaded connection valves on request: 2 x M0 x (see unit dimensions on page 9, item 6)

87 RE XC-B2 DB...5X/...XC Hydraulics Bosch Rexroth G /2 Solenoid-operated relief With the addition of a type 3WE 6 spool-type directional control valve, the valve can be converted in such a way that it is capable of being electrically switched to non-pressurized circulation (main piston relieved of pressure). Before adding a 3WE 6 spool-type directional control valve to a DB 5X/ XC pilot operated pressure relief valve, check whether the category and safety class resulting from this combination still satisfy the requirements of the potentially explosive atmosphere in which the valve is to be used. he spool-type directional control valves for the conversion and the resulting categories and safety classes are set out in the table below. Important notes: he relief function with directional control valve must not be used for safety functions! During assembly, please note the operating instructions that are supplied with the spool-type directional control valves. Modification or conversion of valves without the use of the operating instructions is not permitted. Before assembly, identify all parts by means of their nameplates. he spool-type directional control valve determines the category to Directive 94/9/EG : Spool-type directional control valve Category to 94/9/EG echnical Data Sheet 3WE 6 5X/ XH IM2; II2G RE 2377-XH-B2 3WE 6 6X/ XD IM2; II2G RE 2378-XD-B2 3WE 6 6X/ XE II2G RE 2378-XE-B2 3WE 6 6X/ XN II3G; II3D RE 2378-XN-B2 Example: DB 5X/ XC plus 3WE 6 6X/ XN ) results in suitability for use in category II3G; II3D ) When selecting a valve, please also note the possible switching versions on page 2. Example: ddition of a 3WE 6 6X/ XE spool-type directional control valve he assembly of the directional control valve (removal of sealing plate) is described in RE XC-B3, section 3.4. Y

88 2/2 Bosch Rexroth G Hydraulics DB...5X/...XC RE XC-B2 Solenoid-operated relief (continued) Switching versions For each type of control oil supply of a DB valve, two switching versions are possible for solenoid-operated relief: Closed without current Open without current he choice of piston for the 3WE 6 spool-type directional control valve is determined by the required switching version. Closed without current DB plus 3WE 6 a B b Closed without current DB X plus 3WE 6 a B b X Open without current DB plus 3WE 6 B a B b Open without current DB X plus 3WE 6 B a B b X Closed without current DB Y plus 3WE 6 a B b Closed without current DB XY plus 3WE 6 a B b Y X Y Open without current DB Y plus 3WE 6 B a B b Open without current DB XY plus 3WE 6 B a B b Y X Y Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany elefon +49 (0) / 8-0 elefax +49 (0) / documentation@boschrexroth.de his document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth G. It may not be reproduced or given to third parties without its consent. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

89 RE M/03.0 RE M/03.0 ressure relief valve, pilot operated, sea water resistant ype DB...J Features of the sea water resistant version When compared to the standard version the following modifications have been carried out: he external metal components have been zinc galvanised: housing, plugs and adjustment. Sea water resistance is identified by the code J in the ordering code. Note: Valve fixing screws only optional, when required, they must be ordered separately: 2 off M8 x 60 DIN C or NEL ) ; M = 37 Nm; order in clear text; Material number: ) he code NEL stands for non-electrolytically applied zinc coatings which contain a lubrication additive for the reduction of friction in accordance with ISO/WD Colour: silver. Further information can be obtained from the standard documentation RE Ordering details DB / J * ressure relief valve = DB Without dir. valve = No code With built-on dir. valve = W ) Subplate mounting "No code" NS 0 = 0 25 = 20 hreaded connection Cartridge valve "G" "K" Ordering code = 5 (G 3/4) = 5 (G 3/4) = 20 (G ) For subplate mounting = For threaded connections = G For manifold mounting (cartridge) = K djustment element Rotary knob = Sleeve with hexagon and protective cap = 2 Series 0 to 9 (only version K ) = X (0 to 9: unchanged installation and connection dimensions) Series 40 to 49 = 4X (40 to 49: unchanged installation and connection dimensions) ressure setting up to 50 bar = 50 ressure setting up to 00 bar = 00 ressure setting up to 200 bar = 200 ressure setting up to 35 bar = 35 ressure setting up to 350 bar (only version DB) = 350 Further details in clear text W65 = Vertical cartridge (ordering code not required for cartridge version K ) No code = NBR seals V = FKM seals (other pressure fluids on request) No code = Without directional valve 6 = With directional valve NS 6 No code = Lowest circulation pressure U 3) = See characteristic curves on page 4 (standard documentation) J = Sea water resistant ilot oil supply 2) = X = For ordering details see symbols on page 3 Y = (standard documentation) XY = ) Only for valve with threaded connection 2) Only required for version DBW..G. 3) Version U is not suitable for cross-line relief functions. DB...J /2

90 RE M/03.0 referred types referred types referred types ype Material number ype Material number DB 20 K2-X/00XYJ DB 20 K2-X/00XJV DB 20 K2-X/200XYJ DB 20 K2-X/35XYJ DB 20 K2-X/35YJ DB 20 K2-X/350XYJ DB 0 G2-4X/200XJW DB 0 G2-4X/35XJW DB 0 G2-4X/350YJW DB 20 G2-4X/35JW DB 20 K2-X/35YJV Mannesmann Rexroth G Rexroth Hydraulics D-9783 Lohr am Main Jahnstraße 3-5 D-9786 Lohr am Main elefon / 8-0 elefax / elex documentation@rexroth.de Internet Mannesmann Rexroth Limited Cromwell Road, St Neots, Cambs, E9 2ES el: / Fax: / info@rexroth.co.uk he specified data is for product description purposes only and may not be deemed to be guaranteed unless expressly confirmed in the contract. ll rights reserved Subject to revision 2/2 DB...J

91 ressure relief valve, pilot operated RE 25850/04.05 Replaces: /2 ype DB; DBW Size 52 Component series 3X Maximum operating pressure 35 bar Maximum flow 2000 L/min HD 778 able of contents Contents age Features Ordering code 2 Symbols 3 Cable sockets 3 Function, section, symbol 4 echnical data 5 Characteristic curves 6 General notes 6 Unit dimensions: Flange connection 7 Unit dimensions: Subplate mounting 8 Explanation of items 9 Features For flange connection For subplate mounting 3 pressure adjustment elements optional: Sleeve with hexagon and protective cap Rotary knob Lockable rotary knob Solenoid operated unloading through built-on directional valve Internal or external pilot oil drain Remote control port, optional Main spool insert optional as poppet or spool version Further information: High-performance directional valve, see RE 2378 Connecting flanges, see RE 4550 ype-tested safety valves yp0e DB(W) 52 E, component series 3X, according to ressure Equipment Directive - 97/23/EC (in the following referred to as ED) Ordering code 0 Safety notes, 2 Information on available spare parts:

92 2/2 Bosch Rexroth G Hydraulics DB; DBW RE 25850/04.05 Ordering code DB 52 3X U * ressure relief valve = DB Without directional valve = No code With built-on directional valve = W Size 52 = 52 B B Normally closed Normally open = ) = B ) Version For subplate mounting = For flange connection = F ressure adjustment element Rotary knob = Sleeve with hexagon and protective cap = 2 Lockable rotary knob = 3 2) Main spool s seated spool version = s sliding spool version = L Component series 30 to 39 = 3X (30 to 39: unchanged installation and connection dimensions) ressure stage Set pressure up to 00 bar = 00 Set pressure up to 35 bar = 35 ) Indication only required for version with built-on directional valve (DBW). 2) H-key, order no. R , included in the scope of supply 3) Cable sockets, separate order, see page 3 Further details in clear text ype testing No code = Without type testing E = ype-tested safety valves according to ED 97/23/EC Seal material No code = NBR seals V = FKM seals (other seals on enquiry) Caution! Observe compatibility of seals with hydraulic fluid used! Electrical connection Individual connection K4 3) = Without cable socket, with component plug DIN EN No code = Without manual override N9 ) = With concealed manual override N ) = With manual override G24 ) = W230 ) = 24 V DC C voltage 230 V; 50/60 Hz No code = Without directional valve 6E ) = With directional valve size 6 U = For minimum cracking pressure of 3 bar ilot oil supply = Ordering code X = according to symbols Y = on page 3 XY = For ordering code for type-tested safety valves of type DB(W) 52..3X/..E, see page 0 referred types and standard components are listed in the ES (standard price list).

93 RE 25850/04.05 DB; DBW Hydraulics Bosch Rexroth G 3/2 Symbols ype DB 52.. ype DB 52 X.. ype DB 52 Y.. ype DB 52 XY.. X Y X Y ype DBW 52.. normally open ype DBW 52 X.. normally open B B X B B normally closed normally closed ype DBW 52 Y.. normally open ype DBW 52 XY.. normally open B B Y X Y B B normally closed normally closed Cable sockets to DIN EN Details and further cable sockets, see RE Material no. With LED lamp and With LED lamp With rectifier Zener diode suppressor circuit Colour Without circuitry V V 24 V Grey R Black R90070 R R R

94 4/2 Bosch Rexroth G Hydraulics DB; DBW RE 25850/04.05 Function, section, symbol ressure control valves of type DB/DBW are pilot operated pressure relief valves. hey are used for limiting (DB) or for the limitation and solenoid-operated unloading of a system pressure. hese pressure relief valves basically consist of a pilot control valve () with pressure adjustment element (2), a main valve (3) with main spool insert (4) and an optional directional valve (5). ressure relief valves of type DB he pressure applied by the system acts on the main spool (4). t the same time, the pressure is applied via the pilot lines (6), which are fitted with orifices, to the spring-loaded side of the main spool (4) and to the pilot control valve (). When the system pressure exceeds the value set on the spring (7), the poppet (0) of the pilot control valve opens. he hydraulic fluid can now flow from the spring-loaded side of the main spool (4) via the spring chamber of the pilot control valve () internally via port or externally via port Y - to the tank. Due to the combination of orifices in the pilot lines, a pressure differential arises across the main spool, which causes the connection from to to open. he hydraulic fluid flows from channel to channel at the set operating pressure. he pressure relief valve can be unloaded remotely controlled or changed over to another pressure value via port X X (8). ressure relief valves of type DBW In principle, the function of this valve corresponds to that of valve type DB. Unloading on the main spool (4) is, however, achieved by operating the built-on directional valve (5). o reduce tank pressure peaks when changing over to pressureless circulation by operation of the directional valve, the main spool of sliding spool design (4.) can be used. Influence on the turn-off time he turn-off time can be influenced by means of orifice (9), which has a Ø0.8 as a standard. By changing this orifice (9), the turn-off time can be extended or shortened. his has no effect on the pressure relief function rinciple: 9 X M Ø0,8 Ø,4 B Y X Ø2 ype DBW 52 B2.3X/ XYU6EG24N9K4 4. Sliding spool 4.2 Seated spool Y With type DBW 52 Y the connection Y is closed.

95 RE 25850/04.05 DB; DBW Hydraulics Bosch Rexroth G 5/2 echnical data (for applications outside these parameters, please consult us!) General Weight ype DB kg approx. 27 ype DBW kg approx Installation orientation Optional mbient temperature range ype DB C 30 to + 80 (NBR seals) 5 to + 80 (FKM seals) ype DBW C 30 to + 50 (NBR seals) 5 to + 50 (FKM seals) echnical data of the directional valve See data sheet RE 2378 Connecting flanges See data sheet RE 4550 Minimum strength of materials for subplates, flanges, etc.: he materials must be selected so that sufficient safety is provided under all conceivable operating conditions, e.g.: resistance to pressure, safety against stripping of threads and tightening torques. Hydraulic Maximum operating orts,, X bar 35 pressure Maximum backpressure ort Y ype DB bar 35 ype DBW Y bar 20 for DC solenoid ort ype DBW bar 60 for C solenoid Minimum set pressure bar Depends on flow (see characteristic curve on page 6) Maximum set pressure bar 00; 35 Maximum flow L/min 2000 Hydraulic fluid Mineral oil (HL, HL) to DIN 5524 ) ; fast bio-degradable hydraulic fluids to VDM (see also RE 9022); HEG (rape-seed oil) ) ; HEG (polyglycols) 2) ; HEES (synthetic esters) 2) ; other hydraulic fluids on enquiry Hydraulic fluid temperature range C 30 to + 80 (NBR seals) 5 to + 80 (FKM seals) Viscosity range mm 2 /s 0 to 380 Max. permissible degree of contamination of the hydraulic fluid - cleanliness class to ISO 4406 (c) Class 20/8/5 3) ) Suitable for NBR and FKM seals 2) Suitable only for FKM seals 3) he cleanliness classes specified for components must be adhered to in hydraulic systems. Effective filtration prevents malfunction and, at the same time, increases the service life of components. For the selection of filters, see data sheets RE 50070, RE 50076, RE 5008, RE and RE

96 6/2 Bosch Rexroth G Hydraulics DB; DBW RE 25850/04.05 Deviating technical data for type-tested safety valves ) Hydraulic Maximum flow See table on page 0 and characteristic curves on page 2 Hydraulic fluid Mineral oil (HL, HL) to DIN 5524 and DIN Hydraulic fluid temperature range C 20 to + 60 (NBR seals) 5 to + 60 (FKM seals) Viscosity range mm 2 /s 2 to 230 Maximum backpressures DB../.. DB../..Y DBW../.. DBW../..Y ort Y bar 0 0 ort bar 2) p < 5 2) p < 5 ) For applications outside these parameters, please consult us! 2) See characteristic curves and explanations on max. permissible backpressures on pages 0 and. Characteristic curves (measured with HL46, ϑ oil = 40 C ± 5 C) he characteristic curves were measured with external pilot oil drain and pressureless return flow of the pilot oil. With internal pilot oil drain, the inlet pressure increases by the outlet pressure present in port. Inlet pressure in bar Lowest set pressure in bar Flow in L/min Flow in L/min Main spool insert with sliding spool 2 Main spool insert with seated spool General notes he unloading function (directional valve function of DBW) must not be used for safety functions! With type DBW 52 B..3X/..., the lowest settable pressure (circulation pressure) is set in the event of a power failure or cable break. With type DBW 52..3X/..., the pressure relief function is set in the event of a power failure or cable break. In the case of internal pilot oil drain, the hydraulic backpressures in port or, in the case of external pilot oil drain, the hydraulic backpressures in port Y are fully added to the response pressure of the valve set on the pilot control. Example: ressure adjustment of the valve by spring pre-loading item 7 on page 4 in the pilot control valve/adjustment unit p spring = 200 bar Hydraulic backpressure in port with internal pilot oil drain p hydraulic = 50 bar => Response pressure p spring + p hydraulic = 250 bar

97 RE 25850/04.05 DB; DBW Hydraulics Bosch Rexroth G 7/2 Unit dimensions: Flange connection (nominal dimensions in mm) ,5 (92) 0 5 Ø ±0,2 77 G/2 20 Ø20 Ø X 98 ±2 Y 4 x M6 Ø35 SW6 SW9 SW30 SW Ø45 5 G; Ø4; 7 5 ±0, SW32 SW30 SW Ø60 Ø60 9,5 (98) 8 Explanation of items, see page 9 Caution! lease fix the valve by means of the fixing bores so that reactive forces can be safely absorbed! SW32 SW30 50

98 8/2 Bosch Rexroth G Hydraulics DB; DBW RE 25850/04.05 Unit dimensions: subplate mounting (nominal dimensions in mm) ,5 (92) ,5 (98) ±0, ±0, Y 44 X Ø60 H Ø25, H Ø50 M8 x Y Ø35 SW6 SW9 SW30 SW G; 8 4 Ø26 Ø8 5 ±0, Ø4; ,0/00mm Rzmax 4 SW32 SW30 SW9 Required surface quality of the valve mounting face in the case of mounting without subplate Ø60 For explanation of items, see page 9 Ø60 SW32 SW30 50 Caution! lease fix the valve by means of the fixing bores so that reactive forces can be safely absorbed!

99 RE 25850/04.05 DB; DBW Hydraulics Bosch Rexroth G 9/2 Explanation of items ilot control valve 2 djustment type "" 3 djustment type "2" 4 djustment type "3" 5 Main valve 6 Directional valve size 6, see RE Cable socket without circuitry (separate order, see page 3) 8 Cable socket with circuitry (separate order, see page 3) 9 Space required to remove cable socket 0 Dimension for valve with DC solenoid Dimension ( ) for valve with C solenoid 2 Manual override, optional 3 Connecting flange ( and ), see RE ressure gauge connection 5 Nameplate 6 Identical seal rings for ports and 7 Identical seal rings for ports X and Y 8 Valve fixing bores Valve fixing screws for flange connection (separate order) 2 socket head cap screws ISO M2-0.9 Valve fixing screws for subplate mounting (separate order) 6 socket head cap screws ISO M6 x flZn-240h-L (friction coefficient µ total = 0.09 to 0.4); tightening torque M = 229 Nm ± 0%, material no. R Subplate for subplate mounting (separate order): G 479/0 (suitable connecting flange, see RE 4550)

100 0/2 Bosch Rexroth G Hydraulics DB; DBW RE 25850/04.05 Ordering code: ype-tested safety valves (type DB(W) 52 E) in accordance with ressure Equipment Directive 97/23/EC DB 52 DBW 52 Designation X/ X/ U 7 U6 * Component code Max. permissible flow qv max in L/min with pilot oil return external Y E ÜV.SV F.G.p E ÜV.SV F.G.p internal Set response pressure p in bar Directional valve, normally closed Directional valve, normally open 2 For subplate mounting For flange connection 3 djustment element: hand wheel (pressure setting sealed, unloading or setting of a lower response pressure possible) djustment element with sealed protective cap (no adjustment/unloading possible) 4 Valve with seated main spool Valve with sliding main spool 5 ressure must be entered by the customer in the designation, e.g. pressure setting 50 bar and in 5-bar increments possible 6 Internal pilot oil supply and drain Recommendation: Internal pilot oil supply, External pilot oil drain = = B = = F = = 2 = = L = 50 = ) 2) = Y 2) * Ordering code of electrical data (see page 2) e.g. = EG24N9K4 7 NBR seals FKM seals = No code = V Details entered in the factory ) Dash required only for version with built-on directional valve (DBW) 2) External pilot oil supply X impossible!

101 RE 25850/04.05 DB; DBW Hydraulics Bosch Rexroth G /2 Safety notes: ype-tested safety valves (type DB(W) 52 E) in accordance with ressure Equipment Directive 97/23/EC Before ordering a type-tested safety valve, please note that at the requested response pressure p the max. permissible flow q V max of the safety valve is greater than the max. possible flow of the system. he corresponding regulations must be observed! ccording to ED 97/23/EC the increase in the system pressure caused by the flow must not be greater than 0% of the set response pressure (see component code). Drain lines (ports and Y) of safety valves must allow safe and reliable draining. No fluid may collect in the drain lines. he removal of the seal on the safety valve results in the loss of the approval according to the ED! Generally observe the requirements laid down in ressure Equipment Directive 97/23 EC and in the D2000 sheet 2! Caution! he unloading function provided by the directional valve must not be used for safety-relevant tasks! Should an unloading function be required for safety-relevant tasks, an additional unloading valve must be installed. Notes on the operation must be strictly observed! he response pressure specified in the component code is factory-set at a flow of 2 L/min. he max. permissible flow (= figure in the place of letter G in the component code, see page 0) must not be exceeded. he following is valid: ilot oil drain external (= Y in the ordering code without backpressure in drain line Y, permissible backpressure in the drain line (port ) < 5 bar ilot oil drain internal (= no code in the ordering code). he max. permissible flow is permitted only without backpressure in the drain line (port ). With internal pilot oil drain, as the flow increases, the system pressure rises by the backpressure in the drain line (port ) (observe D sheet 2, para. 6.3!). In order to limit this increase in the system pressure due to the flow to a maximum of 0% of the set response pressure, the permissible flow must be reduced in dependence upon the backpressure in the drain line (port ) (see diagram on page 2).

102 2/2 Bosch Rexroth G Hydraulics DB; DBW RE 25850/04.05 Safety notes: ype-tested safety valves (type DB(W) 52 E) in accordance with ressure Equipment Directive 97/23/EC Max. permissible flow q Vmax in dependence upon backpressure p in the drain line with internal pilot oil drain ype DB(W) 52..3X/...E p in bar 3,5 30 2, p in bar 6 Char. curve Response pressure p in bar , Characteristic curves for intermediate values can be generated by interpolation q Vmax in L/min p = Response pressure in bar p = Max. permissible backpressure in the drain line (port ) (sum of all possible backpressures, see also D2000 sheet - 2) p max = 0% x p (at q V = 0 L/min) q V max = Max. permissible flow in L/min Explanation of diagram Example: Given: System / accumulator flow to be safeguarded Set response pressure of the safety valve Searched: p =? Solution: See arrows in the diagram: p (500 L/min; 20 bar) = 0 bar q V max = 500 L/min p = 20 bar Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) / 8-0 Fax +49 (0) / documentation@boschrexroth.de his document, as well as the data, specifi cations and other information set forth in it, are the exclusive property of Bosch Rexroth G. Without their consent it may not be reproduced or given to third parties. he data specifi ed above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verifi cation. It must be remembered that our products are subject to a natural process of wear and aging.

103 ump safety block ype DB; DBW RE Version: Replaces: 0.05 Sizes 32 and 40 Component series X Maximum operating pressure 350 bar Maximum flow 650 l/min H Features Contents Depressurized start-up and circulation of the pump o be mounted directly onto the SE pressure port of the pump Quick pressure build-up 4 adjustment types for pressure adjustment, optionally Rotary knob Bushing with hexagon and protective cap Lockable rotary knob with scale Rotary knob with scale 5 pressure ratings, optional Solenoid-actuated unloading via a built-on directional valve Integrated check valve, optional Switching shock damping, optional (DBW type only) Features Ordering code 2, 3 Symbols 4 Function, sections 5, 6 echnical data 7, 8 Characteristic curves 8, 9 Unit dimensions 0 3 ossible pump types 3 Mating connectors 8 General notes 8 More information 8 ype-examination tested safety valves type DB E, component series X according to ressure Equipment Directive 97/23/EC Ordering code 4 Deviating technical data 5 Safety instructions 5 7 RE 25880, edition: 203-0, Bosch Rexroth G

104 2/8 DB; DBW ump safety block Ordering code DB X / * 0 ump safety block DB 02 Without directional valve no code With built-on directional valve W 03 Without check valve no code With check valve R ) 04 Size Size Normally closed 2) Normally open B 2) 06 Connection / SE flange 3) Standard flange ( bar) High-pressure flange (350 bar) F H 07 djustment type for pressure adjustment Rotary knob Bushing with hexagon and protective cap 2 Lockable rotary knob with scale 3 4) Rotary knob with scale 7 08 With main spool Ø24 mm With main spool Ø28 mm N 09 Component series 0 9 (0 9: Unchanged installation and connection dimensions) X 0 ressure rating Set pressure 50 bar 50 Set pressure 00 bar 00 Set pressure 200 bar 200 Set pressure 250 bar 250 Set pressure 35 bar 35 Set pressure bar (only version "H") 350 ilot flow ilot oil supply and pilot oil return internal (standard) 5) ilot oil supply internal, pilot oil return external Y 2 Standard version no code Valve for minimum cracking pressure (not suitable for mutual relief!) U ) Only 35 bar 2) Ordering code only required if 02 = "W" 6) Mating connectors, separate order, see page 8 7) Ordering code only required if 02 = "W" and 3 = "S" 3) lease observe pressure ratings and connection dimensions. (See page 2) 4) H-key with material no. R is included in the scope of delivery. 5) Hyphen " " required only if 02 = "W" and 2 and 3 = "no code" referred types and standard units are contained in the ES (standard price list). Bosch Rexroth G, RE 25880, edition: 203-0

105 ump safety block DB; DBW 3/8 Ordering code DB X / * 3 Without switching shock damping no code With switching shock damping (version "W" only) 4 Without directional valve no code With directional spool valve (data sheet 2378) 6E 2) With directional seat valve (data sheet 22058) 6SM 2) 5 Direct voltage 24 V G24 2) Direct voltage 205 V G205 2) lternating voltage 230 V 50/60 Hz (version "6E" only) W230 2) 6 Without manual override no code With manual override (version "6E" only) N 2) With concealed manual override (standard) N9 2) 7 Electrical connection Without mating connector with connector DIN EN K4 2; 6) 8 Nozzles Ø.2 mm in channel B of the directional spool valve R2 7) Nozzles Ø.2 mm in channel of the directional seat valve B2 7) S 9 Seal material NBR seals FKM seals (Other seals upon request) ttention! Observe compatibility of seals with hydraulic fluid used! 20 ype examination Without type examination ype-examination tested safety valve according to ED 97/23/EC no code V no code E 2 Further details in the plain text RE 25880, edition: 203-0, Bosch Rexroth G

106 4/8 DB; DBW ump safety block Symbols ype DB.. ype DB Y.. ype DBR.. ype DBR Y.. Y Y ype DBW ype DBW Y B B normally closed normally closed Y B B normally open normally open ype DBWR ype DBWR Y B B normally closed normally closed Y B B normally open normally open Bosch Rexroth G, RE 25880, edition: 203-0

107 ump safety block DB; DBW 5/8 Function, sections ump safety blocks of types DB/DBW are pilot operated pressure relief valves which are integrated into a block and intended to be mounted directly onto the SE pressure port of pumps. hey are used for limiting (DB) or limiting and magnetically unloading (DBW) the operating pressure. ump safety blocks (DB) basically consist of a valve block (), main spool insert (3) and pilot control valve (2) with adjustment type for pressure adjustment. he valve housing has a port for the hydraulic fluid input and port for the output. In a branch of the through-bore between these two ports there is the main spool insert. When this is open there is a connection to port (tank line). ump safety block type DB he pressure applied in the through-bore acts on the main spool (3). t the same time, pressure is applied to the spring-loaded side of the main spool (3) and to the ball (8) in the pilot control valve (2) via the control lines (6) and (7) which are equipped with nozzles (4) and (5). If the pressure in the through-bore exceeds the value set at spring (9), ball (8) opens against spring (9). he signal for this is provided internally from the throughbore via control lines (0) and (6). he hydraulic fluid on the spring-loaded side of main spool (3) now flows via the control line (7), nozzle bore () and ball (8) into the spring chamber (2). From here, it is fed into the tank, either internally for type DB via control line (3), or externally for type DB Y via control line (4). Nozzles (4) and (5) cause a pressure drop to occur at the main spool (3), hence the connection from channel to channel opens. he hydraulic fluid now flows from channel to channel, whilst the set operating pressure is maintained. ort (5) can be used for remote control purposes. If a pressure load cell or a pressure gauge isolator valve is to be connected here, then version SO66 without nozzle (4) must be ordered. his prevents delays in the build-up of pressure or brief pressure drops when the pressure gauge isolator valve is operated. ump safety block type DBR (with check valve) he integrated check valve maintains the system pressure when the pump is disconnected and prevents the hydraulic fluid from returning to the pump. If this valve is selected, no separate check valve is needed. 2 X ype DB.R ype DB X X X RE 25880, edition: 203-0, Bosch Rexroth G

108 6/8 DB; DBW ump safety block Function, sections, symbols ump safety block type DBW... In addition, it can be switched from the pressure limiting function to depressurized circulation by controlling the built-on directional valve (6). hus, a depressurized startup of the pump is possible. 6 2 B () B B () B2 Representation: Directional valve open ump safety block with switching shock damping (sandwich plate), type DBW S6E...R2 and type DBW S6SM...B2 he opening of the connection from B2 to B or 2 to is delayed by means of the switching shock damping valve (7). ressure peaks and acoustic decompression shocks in the return line can thus be avoided. It is installed between the pilot control valve (2) and the directional valve (6). he degree of damping (decompression shock) is determined by the size of the nozzle (8). By default, a nozzle Ø.2 mm is installed (ordering code..r2.. or..b2..). ype DBW S6E...R2 ype DBW S6SM...B2 2 B 2 Bosch Rexroth G, RE 25880, edition: 203-0

109 ump safety block DB; DBW 7/8 echnical data (For applications outside these parameters, please consult us!) general Size Size Weight ype DB kg 8.4 ype DBW kg Check valve "R" kg Switching shock damping "S" kg Installation position ny mbient temperature range ype DB (NBR seals) (FKM seals) ype DBW (NBR seals) (FKM seals) Housing materials are to be selected so that there is sufficient safety for all imaginable operating conditions (e.g. with regard to compressive strength, thread stripping strengths and tightening torques). Minimum stability of the housing materials hydraulic Maximum operating pressure ort bar 350 ort bar 35 Cracking pressure (for DBR...) bar 0.5 Maximum counter ype DB ort Y bar 35 pressure ype DBW ort Y, bar 20 for DC solenoids or 60 for C solenoid Minimum set pressure bar Flow-dependent (see characteristic curves page 8 and 9) Maximum set pressure bar 50; 00; 200; 35; 350 Maximum flow ype DB/DBW l/min ype DBR/DBWR l/min Hydraulic fluid See table page 8 Hydraulic fluid temperature range C (NBR seals) (FKM seals) Viscosity range mm 2 /s Maximum permitted degree of contamination of the hydraulic fluid Class 20/8/5 ) - cleanliness class according to ISO 4406 (c) ) he cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and at the same time increases the life cycle of the components. For the selection of the filters see echnical data for directional seat valves see data sheet 22058, directional spool valves data sheet Deviating technical data for type-examination tested safety valves see page 5. RE 25880, edition: 203-0, Bosch Rexroth G

110 8/8 DB; DBW ump safety block echnical data (For applications outside these parameters, please consult us!) Hydraulic fluid Classification Suitable sealing materials Standards Mineral oils and related hydrocarbons HL, HL, HLD NBR, FKM DIN 5524 Bio-degradable insoluble in water HEG NBR, FKM VDM HEES FKM soluble in water HEG FKM VDM Flame-resistant water-free HFDU, HFDR FKM ISO 2922 containing water HFC (Fuchs Hydrotherm 46M, etrofer Ultra Safe 620) NBR ISO 2922 Important information on hydraulic fluids! For more information and data on the use of other hydraulic fluids refer to data sheet or contact us! here may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! Flame-resistant containing water: Maximum operating pressure 20 bar Maximum hydraulic fluid temperature 60 C Life cycle as compared to operation with mineral oil HL % Characteristic curves (measured with HL46, ϑ oil = 40 ± 5 C) 8 Minimum set pressure and circulation pressure dependent on the flow Standard version Minimum set pressure, circulation pressure in bar Size Flow in l/min 2 Size 40 Notice! he characteristic curves were measured with external, depressurized pilot oil return. With internal pilot oil return, the inlet pressure increases by the output pressure present in port. he characteristic curves apply to the pressure at the valve output p = 0 bar across the entire flow range. Bosch Rexroth G, RE 25880, edition: 203-0

111 ump safety block DB; DBW 9/8 Characteristic curves (measured with HL46, ϑ oil = 40 ± 5 C) 8 Minimum set pressure and circulation pressure dependent on the flow Version "U" 6 Minimum set pressure, circulation pressure in bar Size Size 40 Flow in l/min Inlet pressure dependent on the flow 400 Input pressure in bar Flow in l/min Size 32 2 Size 40 Notice! he characteristic curves were measured with external, depressurized pilot oil return. With internal pilot oil return, the inlet pressure increases by the output pressure present in port. he characteristic curves apply to the pressure at the valve output p = 0 bar across the entire flow range. RE 25880, edition: 203-0, Bosch Rexroth G

112 0/8 DB; DBW ump safety block Unit dimensions: With directional spool valve (dimensions in mm) , , H2 Y G/4 20 H 4 6; H3 35 Z "X" H6 2,7 Z H5 H4 View "X" L D D2 D3 B G/4 B6 B2 B4 L3 L2 L4 B5 B3 0,0/00 Item explanations see page 3. Dimensional tables see page 2. Rzmax 4 Required surface quality of the valve contact surface Bosch Rexroth G, RE 25880, edition: 203-0

113 ump safety block DB; DBW /8 Unit dimensions: With directional seat valve (dimensions in mm) 50, ,0/00 Rzmax Required surface quality of the valve contact surface H2 H Y H , Z 35 "X" 20 Z H5 H4 L D D2 B B4 G/4 4 6; H6 2,7 8 2 D3 9 G/4 B6 B2 L3 L2 L4 B5 B3 Item explanations see page 3. Dimensional tables see page 2. RE 25880, edition: 203-0, Bosch Rexroth G

114 2/8 DB; DBW ump safety block Unit dimensions (dimensions in mm) Standard flanges, version "DB F" Size L L2 L3 L4 B B2 B3 B4 B5 ) B6 ) H H2 H3 H4 H5 H6 ) ØD ØD2 ØD Standard flanges, version "DBR..F" Size L L2 L3 L4 B B2 B3 B4 B5 ) B6 ) H H2 H3 H4 H5 H6 ) ØD ØD2 ØD Size Version Connections 4 valve mounting screws ISO ) ightening torque and Material no. M in Nm 3) 32 "DB" M0 x 20 R SE /4" G /4 "DBR" M0 x 25 R "DB" M2 x 35 R SE /2" G /2 "DBR" M2 x 40 R dmissible pressures (flange connections according to ISO 662-) in bar SE /4" 250 SE /2" 200 High-pressure flanges, version "DB H" Size L L2 L3 L4 B B2 B3 B4 B5 ) B6 ) H H2 H3 H4 H5 H6 ) ØD ØD2 ØD High-pressure flanges, version "DBR..H" Size L L2 L3 L4 B B2 B3 B4 B5 ) B6 ) H H2 H3 H4 H5 H6 ) ØD ØD2 ØD Size Version Connections 4 valve mounting screws ISO ) ightening torque and Material no. M in Nm 3) 32 "DB" M4 x 35 R SE /4" G /4 "DBR" M4 x 45 R "DB" M6 x 55 R SE /2" G /2 "DBR" M6 x 60 R dmissible pressures (flange connections according to ISO 662-) in bar SE /4" 350 SE /2" 350 ) Only for version with check valve "R" 2) Valve mounting screws (separate order) 4 hexagon socket head cap screws ISO flZn-240h-L (for friction coefficient µ total = ) ttention! For reasons of stability, other valve mounting screws must not be used! 3) he tightening torques are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ±0 %). Bosch Rexroth G, RE 25880, edition: 203-0

115 ump safety block DB; DBW 3/8 Unit dimensions Name plate 2 Omitted with internal pilot oil return 3 Y port for pilot oil return, external 4 djustment type "" 5 djustment type "2" 6 djustment type "3" 7 djustment type "7" 8 Hexagon wrench size 0 9 Switching shock damping sandwich plate, optional 0 Space required to remove the key Space required to remove the mating connector 2 Valve mounting bore 3. Directional spool valve size 6 (data sheet 2378) 3.2 Directional seat valve size 6 (data sheet 22058) 4 Solenoid "a" 5 Manual override, optional 6 Mating connector without circuitry, separate order, see page 8 7 Mating connector with circuitry, separate order, see page 8 8 Seal ring 9 Integrated check valve, version "R" 20 Dimension for valve without manual override 2 Dimension for valve with concealed manual override "N9" 22 Dimension for valve with manual override "N" 23 Space required to remove the coil 24 Lock nut, wrench size 7, tightening torque M = 0 +5 Nm ossible pumps (selection) ump ype Component series/series Data sheet Internal gear pump GH 3X 0227 GH 2X 0223 Displacement pump 2FO Series Industrial-type variable displacement 4VSO Series pump 4VG Series Variable displacement pump 7VO Series VO Series VSO Series VSO Series Notice! Ensure that the connection dimensions are appropriate when selecting the pump, see page 0 2! RE 25880, edition: 203-0, Bosch Rexroth G

116 4/8 DB; DBW ump safety block Ordering code: ype-examination tested safety valves type DB E, component series X according to ressure Equipment Directive 97/23/EC Maximum flow q Vmax in l/min with pilot oil return Size ype designation Component marking External "Y" Internal " " DB 30 NX/ E DBR 30 NX/ E 32 ÜV.SV F.G.p DBW 30 NX/ 6 * E DBWR 30 NX/ 6 * E DB 40 NX/ E DBR 40 NX/ E 40 ÜV.SV F.G.p DBW 40 NX/ 6 * E DBWR 40 NX/ 6 * E Set response overpressure p in bar Directional valve, normally closed Directional valve, normally open B 2 Standard flange F High-pressure flange H 3 djustment type Hand wheel (pressure adjustment sealed, unloading or setting of a lower response pressure possible!) With sealed protective cap (no adjustment/unloading possible) 2 4 ressure in the designation is to be entered by the customer, pressure adjustment 30 bar and possible in 5 bar steps. e. g ilot oil supply and return Internal Recommendation: Internal pilot oil supply, external pilot oil return (ordering code according to symbols page 4) ) Y * Electrical data ordering code (see page 3) e. g. EG24N9K4 6 NBR seals no code FKM seals V Value entered at factory X ) Hyphen " " required only if 02 = "W" and 2 and 3 = "no code" (see pages 2 and 3) Bosch Rexroth G, RE 25880, edition: 203-0

117 ump safety block DB; DBW 5/8 Deviating technical data: ype-examination tested safety valves type DB E, component series X according to ressure Equipment Directive 97/23/EC ) hydraulic Maximum counter pressures ort Y bar 0 ort bar 0 Maximum flow See table page 4 and characteristic curves page 6 and 7 Hydraulic fluid Mineral oil (HL, HL) according to DIN 5524 Hydraulic fluid temperature range C (NBR seals) (FKM seals) Viscosity range mm 2 /s ) For applications outside these parameters, please consult us! Safety instructions: ype-examination tested safety valves type DB E, component series X according to ressure Equipment Directive 97/23/EC Before ordering a type-examination tested safety valve, it must be ensured that at the desired response pressure p, the maximum admissible flow q V max (= numerical value at the position of letter "G" in the component marking) of the safety valve is higher than the maximum possible flow of the system/accumulator to be secured. In this, the corresponding regulations have to be observed! ccording to ED 97/23/EC, the increase in system pressure caused by the flow must not exceed 0 % of the set response pressure (see component marking). he maximum admissible flow q V max specified in the component marking must not be exceeded. Discharge lines of safety valves must end in a risk-free manner. he accumulation of fluids in the discharge lines must not be possible (see D data sheet 2). It is imperative to observe the application notes! In the plant, the response pressure specified in the component marking is set with a flow of 2 l/min. he maximum admissible flow specified in the component marking applies to: External pilot oil return "Y" without counter pressure in the pilot oil return line, admissible counter pressure in the discharge line (port ) < 5 bar. Internal pilot oil return " " without counter pressure in the discharge line (port ) With internal pilot oil return, the system pressure increases by the counter pressure in the discharge line (port ) due to the increasing flow (observe D data sheet; 2, item 6.3). o ensure that this increase in system pressure caused by the volume flow does not exceed the value of 0 % of the set response pressure, the admissible volume flow has to be reduced dependent on the counter pressure in the discharge line (port ), see characteristic curves pages 6 and 7). If a lead seal at the safety valve is removed, the approval according to the ressure Equipment Directive becomes void. Basically, the requirements of the pressure equipment directives and of data sheet D have to be observed! RE 25880, edition: 203-0, Bosch Rexroth G

118 6/8 DB; DBW ump safety block Safety instructions: ype-examination tested safety valves type DB E, component series X according to ressure Equipment Directive 97/23/EC Maximum admissible flow q V max dependent on the counter pressure p in the discharge line with internal pilot oil return ype DB 30 -X/ E p in bar p in bar Characteristic curves Response pressure p in bar , ,5 6, Characteristic curves for intermediate values can be generated by interpolation. Further explanations see page 7. Flow in l/min Bosch Rexroth G, RE 25880, edition: 203-0

119 ump safety block DB; DBW 7/8 Safety instructions: ype-examination tested safety valves type DB E, component series X according to ressure Equipment Directive 97/23/EC Maximum admissible flow q V max dependent on the counter pressure p in the discharge line with internal pilot oil return ype DB 40 -X/ E p in bar p in bar Characteristic curves Response pressure p in bar , ,2,5 6, Characteristic curves for intermediate values can be generated by interpolation. Further explanations see below Flow in l/min p = p = q V max = p max = Response pressure in bar Maximum admissible counter pressure in bar (sum of all possible tank pressures; see also D data sheet 2) Maximum admissible flow in l/min 0 % x p (for q V = 0) according to ED 97/23/EC Explanation of the diagrams (Example: ype DB E, above): known: Flow of the system/accumulator that has to be secured q V max = 320 l/min Set response pressure of the safety valve p = 350 bar unknown: p admissible Solution: See arrows in diagram above p admissible (320 l/min; 350 bar) = 6.2 bar RE 25880, edition: 203-0, Bosch Rexroth G

120 8/8 DB; DBW ump safety block Mating connectors according to DIN EN For details and more mating connectors see data sheet Material no. Color Without circuitry With indicator light V With rectifier V With indicator light and Zener diode suppression circuit 24 V Gray R Black R90070 R R R General notes: he unloading function (directional valve function with version "W") must not be used for safety functions! With version "B", the lowest adjustable pressure (circulation pressure) is set in case of power failure or cable break. With version "", the pressure limiting function is set in case of power failure or cable break. Hydraulic counter pressures in port with internal pilot oil return and/or port Y with external pilot oil return add : to the response pressure of the valve set at the pilot control. Example: ressure adjustment of the valve by spring preload (item 9 on page 5) in the pilot control valve/adjustment type p spring = 200 bar Hydraulic counter pressure in port with internal pilot oil return p hydraulic = 50 bar => Response pressure = p spring + p hydraulic = 250 bar More information Directional spool valve Data sheet 2378 Directional seat valve Data sheet Hydraulic fluids on mineral oil basis Data sheet General product information on hydraulic products Data sheet Installation, commissioning and maintenance of industrial valves Data sheet Selection of the filters Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) / 8-0 documentation@boschrexroth.de ous droits réservés par Bosch Rexroth G, y compris en cas de dépôt d une demande de droit de propriété industrielle. out pouvoir de disposition, tel que droit de reproduction et de transfert, détenu par Bosch Rexroth. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. Bosch Rexroth G, RE 25880, edition: 203-0

121 ump safety block DB; DBW 9/8 Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) / 8-0 documentation@boschrexroth.de ous droits réservés par Bosch Rexroth G, y compris en cas de dépôt d une demande de droit de propriété industrielle. out pouvoir de disposition, tel que droit de reproduction et de transfert, détenu par Bosch Rexroth. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. RE 25880, edition: 203-0, Bosch Rexroth G

122 20/8 DB; DBW ump safety block Notes Bosch Rexroth G Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany hone +49 (0) / 8-0 documentation@boschrexroth.de ous droits réservés par Bosch Rexroth G, y compris en cas de dépôt d une demande de droit de propriété industrielle. out pouvoir de disposition, tel que droit de reproduction et de transfert, détenu par Bosch Rexroth. he data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. he information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. Bosch Rexroth G, RE 25880, edition: 203-0

123 ump safety block ype DB, DBW, DBE(E) RE 2589 Edition: Replaces:.0 Size 6, 25, 32 Component series 2X Maximum operating pressure 350 bar Maximum flow 400 l/min H5872 Features Depressurized start-up and circulation of the pump Intended for direct mounting onto the SE pressure port of the pump Low circulation pressure due to short distance Low compression volume for soft switching to depressurized circulation Quick pressure build-up 4 adjustment types for pressure adjustment, optionally: Rotary knob Bushing with hexagon and protective cap Lockable rotary knob with scale Rotary knob with scale 5 pressure ratings, optional Low noise level due to direct flange mounting onto the pump Contents Features Ordering code 2, 3 Model code 4 General circuit example set-up 5 Circuit examples 6 8 Function, sections 9 echnical data 2, 3 Characteristic curves 3 4 Dimensions 5 2 dmissible pumps 22, 23 Mating connectors 24 General notes, more information 24 ype-examination tested safety valves yp DB E according to ressure Equipment Directive 97/23/EC Ordering code 25 Safety instructions 26 Deviating technical data 26 Diagrams 27, 28 RE 2589, edition: , Bosch Rexroth G