4WEH22L7X/6EG24N9TDAL/V

The 4WEH22L7X/6EG24N9TDAL/V valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation tasks that require precise flow switching. It is built to nominal size NG25 (W.H 22), allowing installation in circuits that use 25 mm flow passages. A maximum flow of 450 l/min with symbol L and an external X port supports high-volume actuators. The unit withstands 280 bar on ports P, A, and B so it can operate in high-pressure systems. Each solenoid is energized with 24 V DC, matching common machine control supplies. A concealed manual override coded N9 lets technicians shift the spool during service without exposing internal parts. The spool geometry follows symbol L, establishing the intended porting pattern when the valve is actuated. External pilot supply with internal return (configuration T) separates pilot feed from the main gallery while letting exhaust oil drain through the body. Reliable shifting begins at a pilot pressure of 10.5 bar applied to the external X connection.

The mounting face follows ISO 4401-08-08-0-05 so the valve mates directly with standard NG25 subplates. Pilot circuits may reach 210 bar, giving flexibility when the control pressure must track elevated system levels. Hydraulic fluid cleanliness must meet class 20/18/15 under ISO 4406 to reduce wear on the spool and sealing edges. FKM seals identified by code V enable use with higher temperatures and chemically aggressive oils. Functional safety is supported by an MTTFd of 100 years, indicating a long statistical service life. The complete assembly with two solenoids and a spring-centered return weighs 11.9 kg, which affects handling during installation. Spring centering drives the spool back to neutral when the solenoids de-energize, ensuring predictable circuit states between cycles. Together these characteristics position the valve for durable directional control in demanding hydraulic machinery.