4WRKE25W8-350L-3X/6EG24K31/F1D3M

The 4WRKE25W8-350L-3X/6EG24K31/F1D3M directional valve belongs to the 4WRKE Directional Valves series and is produced by Bosch Rexroth for closed-loop hydraulic motion control. It manages actuator position by metering flow with an electrically controlled spool. Nominal size 25 determines port dimensions and sets a baseline for flow handling capability. A mounting pattern conforming to ISO 4401-08-07-0-94 permits installation on standard NG25 subplates without adapter blocks. The valve tolerates operating pressures up to 350 bar in the P, A, and B ports, making it suitable for high-pressure circuits. A nominal flow of 350 L/min at a differential pressure of 10 bar enables rapid cylinder or motor response in large-volume systems. Mineral oil fluids of HL or HLP classification are specified, ensuring compatibility with common industrial hydraulic oils. External pilot supply and drain lines isolate control pressure from main flow and minimize internal heat generation. An integrated pressure reducing valve type ZDR 6 DP0-4X/40YM-W80 limits pilot pressure for stable spool positioning. Cleanliness class ISO 4406 20/18/15 is required for the main stage so that wear and blockage are kept within acceptable limits.

A command input signal of 4–20 mA allows proportional control from standard PLC analog outputs. The valve returns an actual value output in the same 4–20 mA range to provide feedback for closed-loop position monitoring. Electronics operate from a 24 VDC supply, matching common machine power rails. Maximum supply current of 1.5 A defines wiring and fuse sizing for the coil driver. Peak electrical power consumption is limited to 72 W, which assists in thermal budgeting inside control cabinets. An IP65 protection rating shields the electrical enclosure against dust ingress and water jets, allowing use in aggressive shop environments. NBR seals are fitted to maintain oil tightness with mineral fluids while withstanding typical temperature ranges. The assembled valve weighs 16.8 kg, so mounting structures must support that mass during service and maintenance.