4WEH10E4X/6EW110N9ETSK4/B10

The 4WEH10E4X/6EW110N9ETSK4/B10 directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. It directs hydraulic flow in automated circuits where electric pilot actuation is preferred. The valve is built in size NG10 so it suits CETOP 5 manifolds without adapters. Its 4-way configuration provides two service ports for actuator motion and dedicated pressure and tank ports, while the E-coded spool establishes the overlap and flow path required for standard cylinder control. A porting pattern of ISO 4401-05-05-0-05 matches common sub-plates for rapid installation. Electrical connection is handled through a DIN EN 175301-803 K4 plug, allowing quick coil replacement during maintenance. The integrated 6E pilot control valve triggers the main spool and keeps the envelope compact. Pilot oil is supplied internally through the ET channel and is returned internally to the tank gallery marked T, so no external pilot lines are necessary. A concealed N9 manual override lets technicians shift the spool during commissioning without exposure to moving parts. Supply-side switching time adjustment marked S enables fine tuning of actuation speed to match machine cycle demands.

The hydraulic section accommodates a continuous flow of up to 160 l/min to cover medium-capacity presses or conveyors. It withstands operating pressures up to 280 bar on the service ports, permitting use on high-load actuators. The pilot stage tolerates pressures up to 250 bar, ensuring reliable shifting even when the main line runs near maximum pressure, and it remains functional down to a minimum pilot pressure of 12 bar so low-pressure start-up circuits are still possible. Achieving the shortest switching times requires a pilot flow of 35 l/min, a specification that helps designers size the upstream supply orifices. A throttle insert with a 1.0 mm bore, coded B10, can be fitted in the P-port to damp pressure surges without external restrictors. The internal geometry supports these ratings while keeping overall flow losses low. All of these hydraulic limits align with the series objective of delivering repeatable directional control in industrial automation where precise timing and robust pressure capability are mandatory.