Pipe burst safety valve RE 6623/06.06 Replaces: 03.99 1/12 ype MHRB Nominal sizes 16 and 22 omponent series 3 Maximum operating pressure 350 bar Maximum flow NS 16 200 l/min NS 22 00 l/min H536 ype MHRB 22 FG3/ H590 ype MHRB 22 FG3/ Overview of contents Features 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 an be directly mounted onto a cylinder with SE porting pattern he velocity increase caused by a hose break < 1% 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 Performing losses, Δp values during the lifting process are minimised
2/12 Bosch Rexroth G Hydraulics MHRB RE 6623/06.06 Ordering details G MHRB G 3 D V 18 * Pipe burst safety valve 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 omponent 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 (other types of connection on request) 18 = SE1 port (for unit dimensions see page 7) Seal material V = FKM seals, suitable for mineral oil (HL, HLP) to DIN 5152 and phosphate ester (HFD-R) Pressure settings No code = Standard, 350 bar = customer specific settings (e.g. 300 bar = 300) Ordering details: G and GS MHRB 3 V * Pipe burst safety valve Nominal size Size 16 (only version G ) = 16 Size 22 = 22 Size 32 (on request) = 32 Version Leak-free version = F Leak-free version, lastkompensiert = L (nur usführung G ) Design with separate tank connection = G with separate tank connection (Size 22) = GS connection offset through 90, see dimensions on page 12 (version MHRB 22 R ) omponent series 30 to 39 = 3 (30 to 39: unchanged installation and connection dimensions) Housing version Sigle connection left = L Sigle connection right = R 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 (other types of connection on request) Size 16 53 = SE3/ port Size 22 18 = SE1 port 2K = SE1 port 2 = SE1 port 9 = SE3/ port 51 = SE1 1/ port (for unit dimensions see pages 8 to 12) Seal material V = FKM seals, suitable for mineral oil (HL, HLP) to DIN 5152 and phosphate ester (HFD-R) Pressure settings No code = Standard, 350 bar = customer 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 characeristic curves and the flow cross-section from actuator to tank is to be stated as a function of the pilot pressure.
RE 6623/06.06 MHRB Hydraulics Bosch Rexroth G 3/12 Symbols Design G Design G and 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 oil port () ain oil port () est point () 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. 1 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. 2 3 ype MHRB 22 FG3/
/12 Bosch Rexroth G Hydraulics MHRB RE 6623/06.06 echnical Data (for applications outside these parameters, please consult us!) General G G GS Weight Size 16 kg approx. 12 Size 22 kg approx. 9,5 approx. 15 approx. 15 Hydraulic G G GS 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 Size 16 l/min 200 Size 22 l/min 00 00 00 Pressure fluid Mineral oil (HL, HLP) to DIN 5152 1) ; HEPG (polyglycole) 2) ; HEES (synthetic ester) 2) ; other pressure fluids on request Pressure fluid temperature range 20 to +80 Viscosity range mm 2 /s to 380 Max. permissible degree of contamination of the hydraulic fluid, cleanliness class to ISO 06 (c) class 20/18/15 We, therefore, recommend a filter with a minimum retention rate of β = 75. 1) suitable for NBR and FPM seals 2) only suitable for FPM seals
RE 6623/06.06 MHRB Hydraulics Bosch Rexroth G 5/12 haracteristic curves (measured at ν = 1 mm 2 /s, ϑ oil = 50 ) ype G 22 12 ontrol characteristic curve = f(s) 30 Pressure differential in bar 8 6 2 Pilot pressure in bar (26) 25 20 15 (7) 5 Fine control range 0 0 80 120 160 200 20 280 320 360 00 0 2 (3) 6 8 12 1 Flow in l/min Spool stroke in mm ype G 16 ontrol characteristic curve = f(s) 30 Pressure differential in bar 8 6 2 Pilot pressure in bar (26) 25 20 15 (7) 5 Fine control range 0 25 50 75 0 125 150 175 200 0 2 (3) 6 8 12 1 Flow in l/min Spool stroke in mm ype G 22 und GS 22 ontrol characteristic curve = f(s) 16 30 Pressure differential in bar 1 12 8 6 2 Pilot pressure in bar (26) 25 20 15 (7) 5 Fine control range 0 0 80 120 160 200 20 280 320 360 00 0 2 (3) 6 8 12 1 Flow in l/min Spool stroke in mm
6/12 Bosch Rexroth G Hydraulics MHRB RE 6623/06.06 Installation example ype MHRB G Dipper Over-load warning switch Pressure equalisation + over-load warning Boom Boom Main control block ype MHRB G/GS Dipper Over-load warning switch Pressure equalisation + over-load warning Boom Boom Main control block
RE 6623/06.06 MHRB Hydraulics Bosch Rexroth G 7/12 Unit dimensions: ype MHRB 22.G D (dimensions in mm) 3 2 1 97,5 27,8 15 Ø 13 Ø 19 M12 60 5 21 57,2 M27x2 29 1 89,2 98,5 11, 138,2 2,5 Ø 25 Ø 39,7 35 5 35 2 115,5 18 36,8 7 0 80 57,2 Ø 56,5 Ø 80 27,8 5; 6 7 6000 psi Port,, 18 SE 1 G1/2 G1/ 1 Pilot oil connection 2 ain oil connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately 7 Port, optionally pluged plug M27 x 2 is supplied loose, ightening torque 90 Nm
8/12 Bosch Rexroth G Hydraulics MHRB RE 6623/06.06 Unit dimensions: ype MHRB 16.G L (dimensions in mm) 3 2 1 7 15 Ø D3 120 161 192 228 167 29,5 1 21 30 88 L3 97,5 Ø 56,5 Ø D5 Ø D 33 36 7 52 68 Ø D2 L G1 36 36 76 2 60 G2 2 65 5; 6 ØD1 L1 ØD6 L6 1 38 1 Pilot oil connection 2 ain oil connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately L2 L5 Port 6000 psi, 3000 psi Valve fixing, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 53 SE3/ SE3/ M22x1,5 M1x1,5 50,8 23,8 22,2 7,6 20 31,7 20 20 M M 50,8 23,8 11 17
RE 6623/06.06 MHRB Hydraulics Bosch Rexroth G 9/12 Unit dimensions: ype MHRB 16.G R (dimensions in mm) Ø 56,5 97,5 29,5 1 88 30 21 228 7 15 3 2 1 L3 167 192 161 120 65 2 5; 6 G2 36 36 76 60 2 L G1 Ø D2 Ø D3 33 36 7 52 68 Ø D 38 1 Ø D5 L6 ØD6 L1 ØD1 L5 L2 1 Pilot oil connection 2 ain oil connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately Port 6000 psi, 3000 psi Valve fixing, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 53 SE3/ SE3/ M22x1,5 M1x1,5 50,8 23,8 22,2 7,6 20 31,7 20 20 M M 50,8 23,8 11 17
/12 Bosch Rexroth G Hydraulics MHRB RE 6623/06.06 Unit dimensions: ype MHRB 22.G L (dimensions in mm) 53 76 View Z: 3 2 1 95 35 18 25 30 118 5 Ø 66 1 SW /F 1 13 5 5 R26, L Z 1 SW /F 1 36 SW /F 36 Ø 50 16 89 58 20 6 Ø D5 Ø D 1 Ø D3 Ø D2 72 79 32 132 182 211 282 5; 6 L3 95,6 67 182 28 33 2 52 80 7 G1 G2 59 9 L1 Ø D1 Ø D6 L6 1 Pilot oil connection 2 ain oil connection 3 est point Name plate L2 19 9 L5 85 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately Port 6000 psi, 3000 psi Valve fixing, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 18 SE1 SE1 G1/2 G1/ 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 19 2K SE1 SE3/ 3/-16 UNF 9/16-18 UNF 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 22 2 SE1 SE1 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 22 9 SE3/ SE3/ 50,8 23,8 22,2 7,6 20 31,7 20 20 M M 50,8 23,8 11 20 51 SE1 1/ SE1 66,7 31,8 26,2 52, 30,7 30 25 M12 M 66,7 31,8 13 22
RE 6623/06.06 MHRB Hydraulics Bosch Rexroth G 11/12 Unit dimensions: ype MHRB 22.G R (dimensions in mm) 1 2 3 76 53 35 18 30 25 Ø 50 1 SW /F 1 L, R26 13 5 5 Ø 66 5 1 SW /F 1 118 282 211 182 32 132 79 72 1 Ø D2 Ø D3 Ø D Ø D5 20 6 SW 3 /F 3 89 58 16 182 95,6 G2 L3 67 G1 ; 5 28 33 2 52 80 7 L6 Ø D1 Ø D6 L1 9 59 1 Pilot oil connection 2 ain oil connection 3 est point Name plate L5 85 L2 9 19 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately Port 6000 psi, 3000 psi Valve fixing, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 18 SE1 SE1 G1/2 G1/ 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 19 2K SE1 SE3/ 3/-16 UNF 9/16-18 UNF 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 22 2 SE1 SE1 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 22 9 SE3/ SE3/ 50,8 23,8 22,2 7,6 20 31,7 20 20 M M 50,8 23,8 11 20 51 SE1 1/ SE1 66,7 31,8 26,2 52, 30,7 30 25 M12 M 66,7 31,8 13 22
12/12 Bosch Rexroth G Hydraulics MHRB RE 6623/06.06 Unit dimensions: ype MHRB 22.GS R (dimensions in mm) 1 2 3 76 53 35 18 30 25 27 18, R26 5 118 27 13 1 SW /F 1 281 211 182 132 L 5 5 31 58 20 1 6 79 71 Ø D2 Ø D3 Ø D Ø D5 7 92 116 G2 L3 60 G1 ; 5 28 33 37 52 80 7 L6 27 36 27 Port 6000 psi, L5 77 Ø D1 Ø D6 L2 9 19 11,5 Ø 50 L1 9 59 1 Pilot oil connection 2 ain oil connection 3 est point Name plate 5 Valve fixing screw holes 6 Valve fixing screws, must be ordered separately 3000 psi Valve fixing, L1 L2 L5 L6 ØD1 ØD2 ØD3 ØD6 G1 G2 L3 L ØD ØD5 18 SE1 SE1 G1/2 G1/ 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 19 2K SE1 SE3/ 3/-16 UNF 9/16-18 UNF 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 22 2 SE1 SE1 57,2 27,8 26,2 52, 25 39,7 25 25 M12 M 57,2 27,8 13 22 9 SE3/ SE3/ 50,8 23,8 22,2 7,6 20 31,7 20 20 M M 50,8 23,8 11 20 51 SE1 1/ SE1 66,7 31,8 26,2 52, 30,7 30 25 M12 M 66,7 31,8 13 22 Bosch Rexroth G Hydraulics Zum Eisengießer 1 97816 Lohr am Main, Germany Phone +9 (0) 93 52 / 18-0 Fax +9 (0) 93 52 / 18-23 58 info.brm-mc@boschrexroth.de www.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.