Bosch Rexroth | 4WEH10H4X6EW110N9ETK4B10
4WEH10H4X/6EW110N9ETK4/B10
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The 4WEH10H4X/6EW110N9ETK4/B10 directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. Designed to route hydraulic flow in automated circuits, it provides NG10 size passageways arranged in a 4-way configuration to steer pressure to work ports. The valve mounts on subplates that follow the ISO 4401-05-05-0-05 interface so installers can swap units without re-machining manifolds. A maximum operating pressure of 280 bar allows the main ports P, A, and B to handle high-pressure lines, while the pilot stage tolerates up to 250 bar to ensure reliable actuation. Internal piloting only needs 7.5 bar to open the spool, so low auxiliary pressure sources are acceptable. Both the pilot oil supply and its return are routed internally to port T, removing the need for external hoses and reducing leakage paths.
Electrical power reaches the solenoid through a DIN EN 175301-803 K4 connector, which simplifies field wiring and standardizes replacement parts. A concealed manual override labeled N9 lets technicians shift the spool during commissioning without exposing the mechanism to contamination. Ambient service temperatures from ‑20 to +50 °C and fluid temperatures from ‑20 to +80 °C cover cold starts and elevated oil conditions in machinery rooms. The design accepts hydraulic media with viscosities between 2.8 and 500 mm²/s, giving flexibility in fluid selection. A throttle insert of 1.0 mm diameter, coded B10, moderates pilot flow to prevent shock during switching. Cleanliness should be maintained at ISO 4406 class 20/18/15 to keep spool lands free of abrasive wear. With a single solenoid the assembly weighs 6.4 kg, which informs mounting hardware choices and handling during service.
Technical Specifications
Ambient Temperature (nbr)
-20 to +50 °C
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Temperature (nbr)
-20 to +80 °C
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (x Internal)
7.5 bar
Mounting Interface
ISO 4401-05-05-0-05
Pilot Oil Return
Internal to T (ET)
Pilot Oil Supply
Internal (ET)
Size
NG10
Throttle Insert
Ø 1.0 mm (B10)
Viscosity Range
2.8 to 500 mm2/s
Way Configuration
4-way
Weight (1 Solenoid)
6.4 kg
1620 Old Apex Road
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