4WRZE16W8-150-7X/6EG24N9ETK31/F1D3V

The 4WRZE16W8-150-7X/6EG24N9ETK31/F1D3V proportional directional valve belongs to the WRZ Proportional Directional Valves series and is produced by Bosch Rexroth. It meters hydraulic flow to directional actuators through a spool whose position is set by an integrated pilot stage. The unit accepts a 4–20 mA command signal so closed-loop controllers can position the spool with standard analog outputs. A supply voltage of 24 V DC powers the onboard electronics, while a pilot valve in size 6 provides the force needed to shift the main stage. Pilot oil is taken internally, eliminating external pilot lines and reducing installation complexity. Flow capacity reaches 150 L/min at a 10 bar pressure drop, and the main ports withstand operating pressures up to 350 bar, allowing the valve to serve medium- to high-pressure circuits. A ZDR 6 DP0-4X/40YM-W80 pressure reducing valve is integrated to stabilize the pilot supply and maintain consistent metering accuracy.

Continuous operation is supported because the electronics are rated for a 100 % duty cycle, and initial spool movement is assisted by a 3 A power pulse current that falls back to a 1.8 A continuous draw once steady state is reached. Electrical hookup is through a DIN EN 175201-804 connector, giving standardized pin assignments for power and feedback. The housing carries an IP65 ingress protection rating so the valve resists dust and low-pressure water streams in typical machine enclosures. A concealed manual override permits service technicians to shift the spool without energizing the coil. FKM seals are fitted to tolerate hydraulic fluids containing additives and to extend service life at elevated temperatures. Return flow at port T is limited to 30 bar when the internal drain is used, safeguarding the pilot stage against back-pressure. The complete assembly weighs 13.6 kg, which should be considered when sizing mounting hardware and support brackets.