Bosch Rexroth | 4WEH16E7X6EW110N9DK25
4WEH16E7X/6EW110N9DK25
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The 4WEH16E7X/6EW110N9DK25 directional spool valve is manufactured by Bosch Rexroth within the WEH Directional Spool Valves series. It directs hydraulic flow for automated machinery and is configured with an E-type spool that passes up to 300 l/min, allowing high-volume circuits to change state without restriction. Ports P, A, and B withstand operating pressures to 280 bar, so the valve suits systems that run near common pump limits. Pilot oil is taken internally, and the internal supply begins working once system pressure reaches 4.5 bar. During service the pilot stage can accept up to 250 bar, while spring-centered actuation remains stable as long as 14 bar is present. Each switching action moves 5.72 cm³ of pilot oil, and the separate Y return path tolerates 160 bar, supporting remote tank routing when backpressure is present.
For installation, the valve follows the ISO 4401-07-07-0-05 porting pattern and seats on the manifold with ISO 4762 M10 × 60 screws tightened to 58 Nm. The assembly mass with two solenoids is 8.9 kg, so a single technician can position it by hand. Fluid cleanliness must be maintained at ISO 4406 20/18/15 to protect the precision spool clearance. A concealed N9 manual override lets maintenance personnel shift the spool without energizing the solenoids, while remaining protected against accidental operation. Port T carries return flow and is rated for 250 bar, providing flexibility to connect into back-pressurized circuits. The calculated mean time to dangerous failure is 100 years, giving a long expected service life within safety-related hydraulic control.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow (spool E)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Min P For Internal Pilot Supply
4.5 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Screw Torque
58 Nm
Mounting Screws
ISO 4762 M10 x 60
Mttfd
100 years
Pilot Oil Supply
Internal (E)
Pilot Return Y Max Pressure (ac)
160 bar
Pilot Volume (per Switch)
5.72 cm3
Porting Pattern
ISO 4401-07-07-0-05
Valve Weight (two Solenoids)
8.9 kg
1620 Old Apex Road
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