Rexroth Series Proportional Hydraulic Valve 4/2 And 4/3 Proportional Directional High-response Valve 4WRA Series 4WRA10W30

Reliable – proven and robust design ▶ Safe – The control spool of the pilot control valve is in the “fail safe” position when the unit is switched off – The control spool of the main valve is in the springcentered central position and/or in the offset position ▶ High quality – control spool and sleeve of the pilot control valve in servo quality ▶ Flexible – suitable for position, velocity and pressure control ▶ Precise – high response sensitivity and little hysteresis ▶ IO-Link interface, optional

The integrated electronics (OBE) compare the specified command value to the position actual value of the main valve control spool. In case of control deviations, the control solenoid will be activated. Due to the changed magnetic force, the pilot control spool is adjusted against the spring. The flow, which is activated via the control cross-sections, leads to an adjustment of the main control spool. The stroke/control cross-section of the main control spool is regulated proportionally to the command value. The pilot oil supply in the pilot control valve is either internal via port P or external via port X. The feedback can be internal via port T or external via port Y to the tank.