Pressure relief valve, pilot operated

Pressure relief valve, pilot operated RE 576/05. Replaces: 0.03 /0 Type ZDB and ZDB Size 0 Component series 4X Maximum operating pressure 35 bar [4600 psi] Maximum flow 00 l/min [6.4 US gpm] H7747 Table of contents Contents Page Features Ordering code Symbols 3 Function, section 4 Technical data 5 Characteristic curves 6 Unit dimensions 7 to 0 Features Sandwich plate valve Porting pattern according to ISO 440-05-04-0-05 and NFPA T3.5. R-00 D05 4 pressure ratings 6 circuit options With or 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: www.boschrexroth.com/spc

/0 Bosch Rexroth AG Hydraulics ZDB; ZDB RE 576/05. Ordering code Z DB 0 4X * Sandwich plate = Z pressure valve cartridge = No code (Only with version "VA", "VB", "VT" and "VP") pressure valve cartridges = (Only with version "VC" and "VD") Pressure relief valve = DB Size 0 = 0 Relief function from - to: A = VA P = VP = VT B = VB A and B = VC A B and B A = VD ) H-key with Material no. R90000858 is included in the delivery Note! To port X and Y bored according to ISO 440-05-05-0-05 (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) Attention! Observe compatibility of seals with hydraulic fluid used! 50 = Setting pressure up to 50 bar [75 psi] 00 = Setting pressure up to 00 bar [450 psi] 00 = Setting pressure up to 00 bar [900 psi] 35 = Setting pressure up to 35 bar [4600 psi] 4X = Component series 40 to 49 (40 to 49: Identical installation and connection dimensions) Adjustment type for pressure adjustment = Rotary knob = 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 EPS (standard price list).

RE 576/05. ZDB; ZDB Hydraulics Bosch Rexroth AG 3/0 Symbols ( = component side, = plate side) Type ZDB 0 VA Type ZDB 0 VB P A B P A B Type ZDB 0 VP Type ZDB 0 VT P A B P A B Type ZDB 0 VC Type ZDB 0 VD P A B P A B Note! Deviating from ISO 440, port T is in this data sheet called, port T is called.

4/0 Bosch Rexroth AG Hydraulics ZDB; ZDB RE 576/05. Function, section Pressure valves of type ZDB and ZDB are pilot operated pressure relief valves in sandwich plate design. They are used for limiting a system pressure. The valves basically consist of a housing (7) and one or two pressure valve cartridges. The system pressure can be set via the adjustment type (4). In the initial position the valves are closed. The pressure in channel A acts on the spool (). At the same time, the pressure is applied to the spring-loaded side of the spool () via nozzle () and to the pilot poppet (6) via nozzle (3). If the pressure in channel A 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 T (). The resulting pressure drop moves the spool () and opens the connection A to T (). In channel A, the pressure set at the spring (5) is set. 4 5 6 7 3 8 A P B Type ZDB 0 VA-4X/ V A P B = component side = plate side

RE 576/05. ZDB; ZDB Hydraulics Bosch Rexroth AG 5/0 Technical Data (For applications outside these parameters, please consult us!) general Weight Type ZDB kg [lbs] Approx..4 [5.3] hydraulic Type ZDB kg [lbs] Approx..6 [5.7] Maximum operating pressure bar [psi] 35 [4600] Maximum setting pressure bar [psi] 50 [75]; 00 [450]; 00 [900]; 35 [4600] Maximum flow l/min [US gpm] 00 [6.4] Hydraulic fluid See table below Hydraulic fluid temperature range C [ F] 0 to +80 [ 4 to +76] Viscosity range mm /s [SUS] 0 to 800 [60 to 370] Maximum permitted degree of contamination of the hydraulic fluid - Class 0/8/5 ) cleanliness class according to ISO 4406 (c) Hydraulic fluid Classification Suitable sealing materials Standards Mineral oils and related hydrocarbons HL, HLP, HLPD NBR, FKM DIN 554 HETG NBR, FKM Environmentally Insoluble in water HEES FKM compatible ISO 5380 Soluble in water HEPG FKM ISO 5380 Water-free HFDU, HFDR FKM ISO 9 Flame-resistant HFC (Fuchs Hydrotherm 46M, Water-containing Petrofer Ultra Safe 60) NBR ISO 9 Important information on hydraulic fluids! For more information and data on the use of other hydraulic fluids refer to data sheet 900 or contact us! Flame-resistant water-containing: Maximum operating pressure 0 bar Maximum hydraulic fluid temperature 60 C Expected service life as compared to HLP hydraulic oil There may be limitations regarding the technical valve 30 % to 00 % data (temperature, pressure range, service life, maintenance intervals, etc.)! ) The 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 www.boschrexroth.com/filter.

6/0 Bosch Rexroth AG Hydraulics ZDB; ZDB RE 576/05. Characteristic curves (measured with HLP46, 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] [000] [000] [0] 350 300 50 00 50 00 50 0 0 0 40 60 80 00 Minimum setting pressure in bar [psi] [363] [300] [50] [00] [50] [00] [50] [0] 5 4 0 5 3 0 5 0 0 0 40 60 80 00 [0] [5] [0] [5] [0] [6.4] Flow in l/min [US gpm] [0] [5] [0] [5] [0] [6.4] Flow in l/min [US gpm] The characteristic curves apply to the pressure at the valve output p = 0 bar across the entire flow range. VD (A to B) VA 3 VB, VC, VT 4 VP, VD (B to A)

RE 576/05. ZDB; ZDB Hydraulics Bosch Rexroth AG 7/0 Unit dimensions: Type ZDB 0 VA, VP and VT (dimensions in mm [inch]) 8 [0.7] 6 4 5 L L L3 H H 3 [.6] 3 0 9 8,5 [0.059] 50 [.969] 48,5 [.909] [ 0.68] 5,7 [ 0.8] 5 0 [0.059],5 30 L4 L7 L6 3 8 5 3 F P F B [.378] 5[.008] A B B 35 B3 F4 F3 9 4 L5 [0.47] 7 4 x 6,7 [ 0.64] [0.0787] Item explanations and valve mounting screws see page 0. Notes! To port X and Y bored according to ISO 440-05-05-0-05 (e.g. for pilot operated directional valve size 0), version "SO30" at the end of the ordering code applies! Deviating from ISO 440, port T is in this data sheet called, port T is called. 0,0/00 [0.0004/4.0] Rzmax 4 Required surface quality of the valve mounting face Type B B B3 H L L L3 L4 L5 L6 L7 VA and VP 69 [.7] VT 70 [.76].5 [0.45] [0.47] 0.7 [0.8] 7 [.06] 6 [.0] 5 [0.98] 7 [8.94] 8 [8.58] 03 [7.99] 94 [7.64] 7 [4.6] 05 [4.3] 57.6 [.7] 60.9 [.40] 50.3 [.98] 53.6 [.] 4 [0.6] 0.7 [0.07] 45.5 [.79] 3.5 [.8]

8/0 Bosch Rexroth AG Hydraulics ZDB; ZDB RE 576/05. Unit dimensions: Type ZDB 0 VB (dimensions in mm [inch]) 7 [4.606] 7 [8.94] 8 [0.7] 03 [7.99] 5 4 6 50 [.969],5 [0.059] 0 9 8 3 3 [.6] 6 [.04] 0,5 [ 0.43] 0 5 30 [.8] [0.453] 8,5 [0.78] 4 [0.57] 58 [.8],5 F P F 5 8 3 69 [.77] [0.85] 0,7 A B 5 [.0] 35 [.378] F4 F3 [0.47] 9 [0.0787] 4 x 6,7 [ 0.64] [.] 8 50 [.97] 7 Item explanations and valve mounting screws see page 0. Notes! To port X and Y bored according to ISO 440-05-05-0-05 (e.g. for pilot operated directional valve size 0), version "SO30" at the end of the ordering code applies! Deviating from ISO 440, port T is in this data sheet called, port T is called. 0,0/00 [0.0004/4.0] Rzmax 4 Required surface quality of the valve mounting face

3 RE 576/05. ZDB; ZDB Hydraulics Bosch Rexroth AG 9/0 Unit dimensions: Type ZDB 0 VC and VD (dimensions in [inch]) 6 4 5 5 4 6 336 [3.3] 8 L L L3 8 [0.7] L4 L5 [0.7] 0 9 8 3 0 9 8,5 6 0,5 5,7 L6 5 0 L7 30 [.8] [.04] 50 [.969] [ 0.43] [ 0.68] [0.059] 8 3 9 35 [.378] 5 L8 [0.47] 5 [.0] 33 L0 F F4 [.99] P A B 4 x 6,7 [ 0.64] F F3 L 7 L9 0,7 [0.465] [.74] [0.8],8 69,5 3 [0.0787] 8 Item explanations and valve mounting screws see page 0. Notes! To port X and Y bored according to ISO 440-05-05-0-05 (e.g. for pilot operated directional valve size 0), version "SO30" at the end of the ordering code applies! Deviating from ISO 440, port T is in this data sheet called, port T is called. 0,0/00 [0.0004/4.0] Rzmax 4 Required surface quality of the valve mounting face Type L L L3 L4 L5 L6 L7 L8 L9 L0 L VC 3 [4.84] VD 3 [5.0] [4.37] 07 [4.0] [4.40] [4.40] 89 [3.50] 85 [3.30] 90 [3.54] 90 [3.54] 59 [.3] 56 [.0] 60 [.36] 56 [.0] 5 [.05] 49 [.93] 53 [.09] 49 [.93] [0.08] 6 [0.4] [0.04] 6 [0.4]

0/0 Bosch Rexroth AG Hydraulics ZDB; ZDB RE 576/05. Unit dimensions Name plate Adjustment type "" 3 Adjustment type "" 4 Adjustment type "3" 5 Adjustment type "7" 6 Dimensions required to remove the key 7 Valve mounting bores 8 Lock nut SW4 9 Hexagon SW0 0 Identical seal rings for ports A, B, P,, (plate side) Sealing plate 80 x 70 x.5 [.76 x 3.5 x 0.06] (only with version "VA" and "VP") Counterbore (only with version "VT") 3 Version "VA" and "VP" 4 Version "VT" 5 Hexagon SW30, tightening torque M A = 50 Nm [36.8 ft-lbs] Valve mounting screws (separate order) 4 hexagon socket head cap screws metric ISO 476 - M6-0.9-flZn-40h-L 4 hexagon socket head cap screws /4-0 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. Component side porting pattern according to ISO 440-05-04-0-05 and NFPA T3.5. R-00 D05 Component side porting pattern according to ISO 440-05-04-0-05 and NFPA T3.5. R-00 D05 Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +49 (0) 93 5 / 8-0 Fax +49 (0) 93 5 / 8-3 58 documentation@boschrexroth.de www.boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The 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. The 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 576/05. ZDB; ZDB Hydraulics Bosch Rexroth AG /0 Notes Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +49 (0) 93 5 / 8-0 Fax +49 (0) 93 5 / 8-3 58 documentation@boschrexroth.de www.boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The 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. The 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.

/0 Bosch Rexroth AG Hydraulics ZDB; ZDB RE 576/05. Notes Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +49 (0) 93 5 / 8-0 Fax +49 (0) 93 5 / 8-3 58 documentation@boschrexroth.de www.boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The 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. The 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.