4WEH32G6X/6EW110N9DAL

The 4WEH32G6X/6EW110N9DAL directional valve belongs to the WEH Directional Spool Valves series produced by Bosch Rexroth for hydraulic automation circuits that require rapid switching of large flow rates between service lines. Valve size NG32 provides a passage area suited to high-volume systems, and the ISO 4401-10-09-0-05 porting pattern aligns the body with standard subplates for quick installation. A maximum flow capacity of 650 l/min at 280 bar allows the spool to route fluid without excessive pressure loss, while the permitted operating pressure of 280 bar at ports P, A, and B sets the working envelope for pumps and actuators connected to those channels. The return port T is limited to 250 bar to protect downstream tank plumbing. Oil cleanliness must meet ISO 4406 class 20/18/15 so that the spool and seat surfaces are not damaged by particulate matter. With two solenoids mounted, the assembly weighs 41.0 kg, which influences hoisting and manifold support requirements. A mean time to dangerous failure of 100 years supports long preventive-maintenance intervals in safety-related systems.

Pilot control data define the actuation forces for this valve. The pilot stage can be supplied with pressure up to 250 bar, giving sufficient force to shift the main spool under full system load, whereas spring-centered versions only need 8.5 bar to return the spool to its neutral position. The trapped control cavity holds 29.4 cm³ of fluid, a volume that must be evacuated during fast switching. Pilot return through port Y can tolerate back-pressure as high as 160 bar, allowing the drain line to share a common return manifold. The pilot inlet is threaded M12 × 1.5, providing a standard plug screw for test points or fixed piping. Mechanical attachment to the subplate uses six M20 × 80 ISO 4762 screws, and each fastener must be tightened to 340 Nm within a ±10 percent window to maintain gasket compression. These mounting values secure the block against hydraulic forces and isolate vibration transmitted from adjacent machinery.