Pipe burst safety valve Type MHRB

Transcription

1 RE 6 623/03.99 Replaces: Pipe burst safety valve ype MHRB Nominals sizes 16 and 22 Series 3 Maximum operating pressure 350 bar Maximum flow: NS L/min NS L/min H//D590/98 ype MHRB 22 FG3/... Overview of contents ontents Page Features 1 Ordering details 2 Symbols 3 Function, section 3 echnical data haracteristic curves 5 Installation example 6 Unit dimensions 7 to 12 H/536/96 ype MHRB 22 FG3/... Features an be directly mounted onto a cylinder with an SE porting pattern he velocity increase caused by a hose break, < % of the initial velocity No lowering of the load in the neutral position - leak-free version. Very good, even fine control characteristics in any cylinder position No increase in working cycle times when MHRB valves are fitted. Machine data in unchanged. he MHRB valves can be easily rectro fitted, the directional valve control characteristic curves have to be stated. No changes are required to the directional valve Performance losses, p values during the lifting process are minimised MHRB 1/12 Rexroth Hydraulics

2 Ordering details G MHRB G 3 D V 18 * Nominal size Size 16 (on request) = 16 Size 22 = 22 Version Leak-free version = F Leak-free version, load compensated = L (on request) Design Standard version = G Series Series 30 to 39 = 3 (30 to 39: unchanged installation and connection dimensions) Housing version Standard housing, symetrical = D (other versions on request) haracteristic curves re factory defined, = 1) he control characteristic curves of the control blocks/directional valves which are fitted are required Further details in clear text onnection type (further types of connection on request) 18 = SE 1 port (for unit dimensions see page 7) Seals V = FPM seals, suitable for minerail oil (HL,HLP) to DIN and phosphate ester (HFD-R) Pressure settings No code = Standard, 350 bar... = ustomer specific settings (e.g. 300 bar = 300) 1) In the case of an order, exact details regarding the control blocks/directional valves that are to be used as well as the pilot characteristic curves and the flow cross-section from actuator to tank is to be stated as a function of the pilot pressure. Ordering details G/GS MHRB Nominal size 3 V Size 16 (only version..g..) = 16 Size 22 = 22 Size 32 (on request) = 32 Version Leak-free version = F Load compensated version (only version..g..) = L Design With a separate tank connection = G With a separate tank connection (Size 22) = GS onnection offset through 90, see unit dimensions on page 12 (version MHRB 22..R..) Series Series 30 to 39 = 3 V = (30 to 39: unchanged installation and connection dimensions) Housing version Single connection left = L Single connection right = R No code = 1) In the case of an order, exact details regarding the control blocks/ directional valves that are to be used as well as the pilot characteristic curves and the flow cross-section from actuator to tank is to be stated as a function of the pilot pressure. * Further details in clear text onnection type (further types of connection on request) Size = SE 3/ port Size = SE 1 port 2K = SE 1 port 2 = SE 1 port 9 = SE 3/ port 51 = SE 1 1/ port (for unit dimensions see pages 8 to12) Seals FPM seals, suitable for mineral oil (HL,HLP) to DIN and phosphate ester (HFD-R) Pressure settings Standard, 350 bar... = ustomer specific settings (e.g. 300 bar = 300) 1) = re factory defined, he control characteristic curves of the control blocks/directional valves are required Rexroth Hydraulics 2/12 MHRB

3 Symbols Variant: G Variant: G/GS Function, section Design he valve basically comprises of: Housing (1) Main spool with leak-free closure (2) ontrol springs (3) Secondary pressure relief valve () onnections Feed port () ylinder port () Pilot port () ain port () est point () Over-load warnings, equalisation line he test point () is used for test purposes or to connect an over-load pressure switch. For parallel operation as a connection for the pressure equalisation line. Pipework Required sizes: Length < 3 m = pipe 12 x 1.5 = ID 9 Length > 3 m = pipe 15 x 1.5 = ID 12 Regulations (DIN/ISO 863) Excavators and excavator loaders (maschines), that are to preform lifting operations must be fitted with pipe burst safety valves. Function Flow direction from to he fluid flows over the pressure relief valve () to port. Flow direction from von to he leak-free closure (2) is released via the pilot pressure (). With an increase in the pilot pressure () the main spool is proportionaly pushed against the control spring (3) and the opening cross-section is proportinaly increased ype MHRB 22 FG3/... MHRB 3/12 Rexroth Hydraulics

4 echnical data (for applications outside these parameters, please consult us!) General / Hydraulic technical data Pressure fluid Mineral oil (HL, HLP) to DIN 51 52; Fast bio.degradable pressure fluids to VDM 2568 (also see RE ); HEG (rape seed oil; HEPG (polyglycole); HEES (synthetic ester; other pressure fluids on request Pressure fluid temperature range 20 to + 80 Viscosity range mm 2 /s to 380 Degree of fluid contamination Maximum permissible degree of contamination of the pressure fluid is to NS 1638 class 9. We, therefore, recommend a filter with a minimum retention rate of ß 75. Maximum operating pressure bar 350 Peak pressure at port bar 20 (6000 PSI) at port bar 2 (3000 PSI) Pilot pressure bar see characteristic curves on page 5 Maximum flow L/min ype G G GS Size Size Weight kg Size 16 approx.12 Size 22 approx.9,5 approx.15 approx.15 Rexroth Hydraulics /12 MHRB

5 haracteristic curves (measured at ν = 1 mm 2 /s and ϑ = 50 ) ype G ontrol characteristic curve = f (s) 30 Pressure differential in bar Pilot pressure in bar (26) (7) 5 Fine control range (3) Flow in L/min Spool stroke in mm ype G 16 ontrol characteristic curve = f (s) 30 Pressure differential in bar Pilot pressure in bar (26) (7) 5 Fine control range (3) Flow in L/min Spool stroke in mm ypes G 22 and GS 22 ontrol charateristic curve = f (s) Pressure differential in bar Pilot pressure in bar 30 (26) (7) 5 Fine control range (3) Flow in L/min Spool stroke in mm MHRB 5/12 Rexroth Hydraulics

6 Installation example: type MHRB...G... Dipper Over-load warning switch Pressure equalisation + over-load warning Boom Boom Main control block Installation example: type MHRB...G/GS... Dipper Over-load warning switch Pressure equalisation + over-load warning Boom Boom Main control block Rexroth Hydraulics 6/12 MHRB

7 Unit dimensions: type MHRB 22.G...D (Dimensions in mm) ,5 27,8 15 Ø 19 Ø 13 M ,2 M27x ,2 98,5 11, 138,2 2,5 Ø 25 Ø 39, , , ,2 Ø 56,5 Ø 80 27,8 5; PSI Port,, 18 SE 1 G 1/2 G 1/ 1 Pilot connection 2 ain connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws (must be ordered separately) 7 Port, optionally pluged plug M27x2 is supplied loose, ightening torque 90 Nm MHRB 7/12 Rexroth Hydraulics

8 Unit dimensions: type MHRB 16.G...L (Dimensions in mm) Ø D , L3 97,5 Ø 56,5 Ø D5 Ø D Ø D2 L G G ; Pilot connection 2 ain connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately ØD1 L2 L1 ØD6 L5 L PSI 3000 PSI Valve fixing Port,, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 53 SE 3/ SE 3/ M22x1,5 M1x1,5 50,8 23,8 22,2 7, , M M 50,8 23, Rexroth Hydraulics 8/12 MHRB

9 Unit dimensions: type MHRB 16.G..R (Dimensions in mm) Ø 56,5 97,5 29, L ; 6 G L G1 Ø D2 Ø D Ø D 38 1 Ø D5 L6 ØD6 L5 L1 ØD1 L2 1 Pilot connection 2 ain connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately 6000 PSI 3000 PSI Valve fixing Port,, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 53 SE 3/ SE 3/ M22x1,5 M1x1,5 50,8 23,8 22,2 7, , M M 50,8 23, MHRB 9/12 Rexroth Hydraulics

10 Unit dimensions: type MHRB 22.G..L (Dimensions in mm) Ø 66 1 SW /F R26, L SW 1 /F 1 Ø 50 SW 36 /F Ø D5 Ø D 32 1 Ø D3 Ø D ; 6 L3 95, G1 G L1 L2 19 Ø D1 Ø D6 L L6 1 Pilot connection 2 ain connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately 6000 PSI 3000 PSI Valve fixing Port,, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 18 SE 1 SE 1 G 1/2 G 1/ 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, K SE 1 SE 3/ 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, SE 1 SE 1 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, SE 3/ SE 3/ 50,8 23,8 22,2 7, , M M 50,8 23, SE 11/ SE 1 66,7 31,8 26,2 52, 30, M12 M 66,7 31, /-16 UNF 9/16-18 UNF Rexroth Hydraulics /12 MHRB

11 Unit dimensions: type MHRB 22.G..R (Dimensions in mm) Ø 50 SW 1 /F 1 L, R Ø 66 5 SW 1 /F Ø D2 Ø D3 Ø D Ø D SW 3 /F ,6 G2 L3 67 G1 ; L6 Ø D1 Ø D6 L5 L L Pilot connection 2 ain connecion 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately 6000 PSI 3000 PSI Valve fixing Port,, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 18 SE 1 SE 1 G 1/2 G 1/ 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, K SE 1 SE 3/ 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, SE 1 SE 1 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, SE 3/ SE 3/ 50,8 23,8 22,2 7, , M M 50,8 23, SE 11/ SE 1 66,7 31,8 26,2 52, 30, M12 M 66,7 31, /-16 UNF 9/16-18 UNF MHRB 11/12 Rexroth Hydraulics

12 Unit dimensions: type MHRB 22.GS..R (Dimensions in mm) , R SW /F L Ø D2 Ø D3 Ø D Ø D G2 L3 60 G1 ; L Ø D1 Ø D6 L5 L ,5 Ø 50 L Pilot connection 2 ain connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately 6000 PSI 3000 PSI Valve fixing Port,, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 18 SE 1 SE 1 G 1/2 G 1/ 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, K SE 1 SE 3/ 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, SE 1 SE 1 57,2 27,8 26,2 52, 25 39, M12 M 57,2 27, SE 3/ SE 3/ 50,8 23,8 22,2 7, , M M 50,8 23, SE 11/ SE 1 66,7 31,8 26,2 52, 30, M12 M 66,7 31, /-16 UNF 9/16-18 UNF Mannesmann Rexroth G Rexroth Hydraulics D Lohr am Main Jahnstraße 3-5 D Lohr am Main elefon / 18-0 elefax / elex Mannesmann Rexroth Limited romwell Road, St. Neots, Huntingdon, ambs. PE19 2ES el: (0180) 7601 Fax: (0180) 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 12/12 MHRB