Industrial Hydraulics

Bosch Rexroth AG Industrial Hydraulics 67 Proportional, high-response and servo-valves
Proportional directional valves, direct operated,
with electrical position feedback
< Sizes 6 and 10
< Porting pattern to DIN 24340 form A
< Control of the direction and magnitude of a flow
< Proportional solenoid operation
< Spring-centered control spool
< Different spool overlaps possible
< Position sensing of the control spool via inductive position transducer
< Integral control electronics for type 4WREE
Types 4WRE, 4WREE
Size 6 10
Operating pressure pmax bar 315 315
Nominal flow (∆p = 10 bar) qV nom L/min 8, 16, 32 25; 50; 75
Maximum hysteresis % 0.1 0.1
Step response 0 to 90 % Tu +Tg ms 20 40
Operating voltage U V 24 24
I mA < 2 < 2
Comm. value signal U V ± 10 ± 10
I mA 4 to 20 4 to 20
Control electronics Type 4WRE analogue VT-RPA2 / VT-MRAP2 VT-VSPA
digital VT-VRPD2 VT-VRPD2
Proportional directional valves, direct operated,
with electrical position feedback and bus interface
< Sizes 6 and 10
< Porting pattern to DIN 24340 form A
< Version for CAN bus with CANopen protocol (DS 408)
< Separate plugs for power supply and bus connection
< Command value feedforward analogue or via bus
< Zero point correction and overlap compensation can be parameterized via bus
Type 4WREF
Size 6 10
Operating pressure pmax bar 315 315
Nominal flow (∆p = 10 bar) qV nom L/min 8, 16, 32 25, 50, 75
Maximum hysteresis % 0.1 0.1
Step response 0 to 90 % Tu +Tg ms 20 40
Operating voltage U V 24 24
I mA < 2 < 2
Comm. value signal U V ± 10 ± 10
I mA 4 to 20 4 to 20
Detailed information:
RE 29061
Detailed information:
RE 29015-Z
CANopen protocol