4WEH22Q7X/6EW110N9ETSK4/B10

The 4WEH22Q7X/6EW110N9ETSK4/B10 directional spool valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth and serves as an interface between electronic control systems and hydraulic actuators. Electro-hydraulic actuation lets a low-power solenoid pilot shift the main spool, giving automated machines electrical command of fluid flow. A 4-way configuration supplies pressure, return, and two work ports so cylinders or motors can extend and retract under controlled conditions. The valve is built in nominal size NG25 (W.H 22), a dimension that supports medium-to-high flow rates while fitting standard subplates. Spool type Q defines the internal land pattern that matches common industrial logic circuits. A free-flow cross-section of 78 mm² on paths A-T and B-T reduces pressure loss when the spool is at zero overlap. The ISO 4401-08-08-0-05 mounting interface aligns the body with widely used manifold patterns to simplify installation. Internal supply and return for pilot oil remove the need for external pilot lines, and a minimum pilot pressure of 10.5 bar keeps the spring-centered spool stable. Supply-control switching-time adjustment lets technicians tailor response speed, and a concealed N9 manual override offers emergency shifting without exposing the button to accidental presses.

The hydraulic section tolerates 280 bar at ports A and B so the valve can direct flow in high-pressure work circuits, while a 250 bar limit on the T port ensures safe back-pressure handling. Pilot components accept up to 210 bar, allowing designers to use elevated pilot supplies without exceeding rated limits. A B10 throttle insert with a 1.0 mm orifice is installed in the pilot path to dampen flow surges and smooth spool movement. Electrical connection is made through a DIN EN 175301-803 K4 plug, giving the solenoid a standardized interface for machine wiring. System cleanliness must reach ISO 4406 class 20/18/15 so the precision-ground spool avoids scoring or sticking caused by particulate contamination. Together, these parameters equip the valve for reliable, repeatable service in automated hydraulic circuits that demand stable flow control under varying loads.