Industrial Hydraulics
Industrial Hydraulics
Industrial Hydraulics
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Proportional, high-response and servo-valves<br />
Detailed information:<br />
RE 29055<br />
Detailed information:<br />
on inquiry<br />
Types 4WRAE, 4WRA<br />
66 <strong>Industrial</strong> <strong>Hydraulics</strong> Bosch Rexroth AG<br />
Proportional directional valves, direct operated,<br />
without electrical position feedback<br />
< Sizes 6 and 10<br />
< Porting pattern to DIN 24340 form A<br />
< Control of the direction and magnitude of a flow<br />
< Proportional solenoid operation<br />
< Spring-centered control spool<br />
< Different spool overlaps possible<br />
< Integral control electronics for type 4WRAE<br />
Size 6 10<br />
Operating pressure pmax bar 315 315<br />
Nominal flow (∆p = 10 bar) qV nom L/min 7, 15, 26 30, 60<br />
Maximum hysteresis % 5 5<br />
Step response 0 to 90 % Tu +Tg ms < 40 < 140<br />
Operating voltage U V 24 24<br />
Comm. value signal Type 4WRAE U V ± 10 ± 10<br />
I mA 4 to 20 4 to 20<br />
Control electronics Type 4WRA analogue VT-VSPA / VT-MSPA-2 VT-VSPA<br />
digital VT-VSPD-1 VT-VRPD2-1<br />
Proportional directional valves, direct operated,<br />
without electrical position feedback, with bus interface<br />
< Sizes 6 and 10<br />
< Porting pattern to DIN 24340 form A<br />
< Version for CAN bus with CANopen protocol (DS 408)<br />
< Separate plugs for power supply and bus connection<br />
< Command value feedforward analogue or via bus<br />
< Zero point correction and overlap compensation can be parameterized via bus<br />
Type 4WRAF<br />
Size 6 10<br />
Operating pressure pmax bar 315 315<br />
Nominal flow (∆p = 10 bar) qV nom L/min 7, 15, 26 30, 60<br />
Maximum hysteresis % 5 5<br />
Step response 0 to 90 % Tu +Tg ms < 40 < 140<br />
Operating voltage U V 24 24
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