Bosch Rexroth | 4WEH22J7X6EG24N9K4
4WEH22J7X/6EG24N9K4
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The 4WEH22J7X/6EG24N9K4 is a directional valve in the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation where fast, reliable flow reversal is required. It uses nominal size NG25 ports so it fits manifolds designed for that passage cross-section, and it handles up to 450 l/min when symbol J is operated at 280 bar. The working pressure on ports P, A, and B may reach 280 bar, giving the actuator circuit full system force while the valve body remains within its strength limits. Two solenoids powered from a 24 V DC coil shift the spool, and wiring is completed with a DIN EN 175301-803 K4 connector. The assembly weighs 11.9 kg in its spring-centered version, which aids stability on the manifold block. A concealed manual override identified by code N9 lets service staff reposition the spool without energizing the coil, and external pilot oil designated by X supplies control pressure independent of the main flow.
Permissible ambient temperature ranges from −20 °C to +50 °C, allowing installation in unheated workshops or warm machine enclosures. The hydraulic fluid may operate between −20 °C and +80 °C provided its viscosity stays within 2.8 to 500 mm²/s, ensuring the spool lands seal correctly throughout seasonal shifts. Fluid cleanliness must reach ISO 4406 (c) 20/18/15 or better so the narrow control edges avoid abrasive wear. The pilot stage tolerates up to 210 bar, while return flow through port T can rise to 250 bar without exceeding case stress limits. Spring-centered operation begins once pilot pressure exceeds 10.5 bar, guaranteeing positive centering after each control pulse. Machining of the mounting face follows port pattern ISO 4401-08-08-0-05, which standardizes bolt locations and O-ring grooves for interchange with other NG25 directional valves.
Technical Specifications
Ambient Temperature Range (nbr)
−20 to +50 °C
Cleanliness Class
ISO 4406 (c) 20/18/15
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Hydraulic Fluid Temp Range (nbr)
−20 to +80 °C
Manual Override
Concealed (N9)
Max Flow (symbol J @ 280 Bar)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Nominal Size
NG25
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-08-08-0-05
Viscosity Range
2.8 to 500 mm²/s
Weight (2 Solenoids, Spring-centered)
11.9 kg
1620 Old Apex Road
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