4WEH32E6X/6EW110N9DA

The 4WEH32E6X/6EW110N9DA valve belongs to the WEH Directional Spool Valves series produced by Bosch Rexroth for hydraulic automation circuits where electrically signaled flow control is required. It uses electro-hydraulic actuation so an electrical command shifts the main spool with hydraulic pilot assistance, reducing the solenoid force needed on a large NG32 body. The NG32 size defines the port dimensions and allows compatibility with high-capacity manifolds common in heavy machinery. A four-way flow path enables controlled routing between pressure, tank, and two actuator ports, making the valve suitable for bidirectional cylinder operation. The internal spool follows symbol E, establishing specific overlap and metering characteristics that influence acceleration and deceleration of the actuator. When the pilot pressure is removed, a spring-centered return pushes the spool back to its neutral position, ensuring fail-safe blocking without external power. This neutral positioning can still be bypassed because a concealed manual override coded N9 lets maintenance staff shift the spool during commissioning or power loss. The interface follows porting pattern ISO 4401-10-09-0-05, allowing direct mounting on standard subplates without custom drilling, and reliable spool movement requires a minimum pilot pressure of 8.5 bar.

Under working conditions the valve passes up to 1100 liters per minute at 70 bar, providing ample flow for large cylinders and hydraulic motors. The main ports withstand operating pressures up to 280 bar, supporting high-force applications without structural fatigue. Pilot control lines can be supplied with pressures as high as 250 bar, giving designers flexibility when selecting pilot sources in high-pressure systems. For fastest response the pilot circuit should supply 45 liters per minute, which minimizes shift time and improves cycle rates on automated equipment. NBR seals are fitted to contain mineral oil and maintain leakage control across the specified temperature range. Installation requires six M20 × 80 screws per ISO 4762; this hardware distributes clamping force evenly across the valve footprint. Each screw must be tightened to 340 newton-meters to secure the valve and prevent gasket extrusion under pressure. The complete assembly with two solenoids weighs 41 kilograms, a factor to consider when selecting support brackets and handling equipment during installation.