4WEH10E4X/6EW110N9K4

The 4WEH10E4X/6EW110N9K4 directional spool valve is built by Bosch Rexroth for the WEH Directional Spool Valves series, where it directs pressurized oil to actuators in hydraulic automation circuits. The valve size NG10 provides a port layout appropriate for medium-duty machinery, while the mounting interface ISO 4401-05-05-0-05 aligns with standard subplates to simplify installation. A maximum operating pressure of 280 bar allows the body to withstand common system pressures, and a maximum flow of 160 l/min specified by symbol E indicates the volume it can route without undue restriction. Control oil enters through an external X port so pilot pressure is isolated from the main gallery, and the external Y port returns pilot oil to tank to prevent back-pressure on the control piston. Reliable shifting begins at a minimum pilot pressure of 12 bar, and the control circuit may be supplied up to 250 bar without overstressing pilot components. These features position the valve as a versatile element for proportional or on/off actuation tasks.

Electrical power reaches the solenoid through a DIN EN 175301-803 K4 plug, which supports quick replacement during service. A concealed manual override identified by code N9 lets technicians move the spool mechanically for testing while keeping the mechanism protected from dirt. NBR seals are fitted to match mineral oils and to operate across a hydraulic fluid temperature span of –20 °C to +80 °C, ensuring leak-free performance in typical plant environments. The permitted viscosity range of 2.8 to 500 mm²/s allows the valve to function with both low-temperature and high-temperature oils without sluggish response. System oil must meet cleanliness level ISO 4406 (c) 20/18/15 so internal clearances stay free of abrasive particles and spool motion remains precise. A mass of 6.8 kg informs bracket design and handling equipment selection when integrating the valve into manifolds or maintenance spares inventories.