4WRKE25W8-350L-3X/6EG24K31/A5D3M

The 4WRKE25W8-350L-3X/6EG24K31/A5D3M valve belongs to the 4WRKE Directional Valves series and is manufactured by Bosch Rexroth. It regulates flow and pressure in hydraulic automation circuits where precise actuator control is required. The nominal size is 25, providing port dimensions suitable for medium-to-large flow paths. Under a 10-bar differential, the nominal flow reaches 350 L/min, ensuring consistent cylinder speed during normal duty cycles. For transient demands the main valve can pass up to 870 L/min, giving reserves for rapid movement. A maximum operating pressure of 350 bar allows the unit to work with high-force hydraulic cylinders. Mineral oil grades HL or HLP are designated as the pressure fluid so maintenance teams can rely on commonly stocked oils. NBR seals are fitted to remain compatible with these fluids and to contain pressure without swelling. The housing carries an IP65 rating, which protects internal electronics from dust ingress and low-pressure water jets, and the main valve cleanliness class is 20/18/15 to limit wear caused by solid contamination.

The valve accepts a ±10 V command signal so proportional spool position can be set directly from standard motion controllers. Internal electronics are powered from a 24 V DC supply, while the drive stage draws up to 1.5 A, keeping control cabinet fuse ratings modest and reducing heat dissipation in the power stage. Electrical consumption does not exceed 72 W, permitting passive cooling in most enclosures and minimizing auxiliary fan requirements. Pilot stages tolerate supply pressures up to 315 bar, which matches typical pump line pressures found in high-power manifolds, and they require 11.7 L/min when stepping the spool from 0 to 100 percent for fast response and repeatable metering. The external return port T withstands back pressure to 250 bar, allowing the valve to share common tank lines in compact manifolds. Finally, the assembly weighs 16.8 kg, which enables single-person handling during installation yet provides sufficient mass to damp vibration on mobile equipment.