Bosch Rexroth | 4WEH10UA4X6EW110NK4
4WEH10UA4X/6EW110NK4
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The 4WEH10UA4X/6EW110NK4 valve is built by Bosch Rexroth as part of the WEH Directional Spool Valves series for controlling actuator motion in hydraulic automation systems. It is classified as size NG10, matching manifolds where flow paths are sized for medium-capacity circuits. The porting pattern follows ISO 4401-05-05-0-05 so the valve drops onto standardized subplates without adaptation. Three spool positions are provided, allowing forward, neutral, and reverse flow states; the inserted spool carries symbol U, indicating its cross-porting configuration. A maximum flow rating of 160 l/min supports cylinders or motors that demand steady medium flow. Working ports P, A, and B may be pressurized up to 280 bar, enabling use in high-pressure machinery. The internal pilot stage accepts external pressure from 12 bar to ensure reliable actuation, while the circuit will tolerate pilot pressures up to 250 bar for quick shifting under full load.
For auxiliary functions the valve includes a manual override so technicians can reposition the spool during commissioning or power loss. Pilot oil returning through port y may reach 160 bar, which helps when back-pressure exists in the tank line. The spring-centered version encloses a pilot volume of 2.04 cm³, a figure used when sizing damping orifices and response time. Electrical control is achieved through a DIN EN 175301-803 plug coded K4, simplifying wiring in modular panels. Installation uses four M6 × 45 screws according to ISO 4762, and each screw is tightened to 12.5 Nm to secure the body against the subplate. Fluid cleanliness must remain better than ISO 4406 20/18/15 to protect precision edges from wear. The two-solenoid, spring-centered assembly weighs 6.8 kg, light enough for one-person handling during maintenance.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Yes
Max Flow (symbol U)
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (x External)
12 bar
Mounting Screws
M6 x 45 (ISO 4762)
Pilot Return (y) Max Pressure (ac)
160 bar
Pilot Volume (3-pos, Spring-centered)
2.04 cm3
Porting Pattern
ISO 4401-05-05-0-05
Spool Positions
3
Spool Symbol
U
Tightening Torque
12.5 Nm
Valve Size
NG10
Weight (two-solenoid, Spring-centered)
6.8 kg
1620 Old Apex Road
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