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The 4WEH10E4X/6EW110N9ETS2K4/B10 valve is part of the WEH Directional Spool Valves series from Bosch Rexroth and is used to route hydraulic flow in automated systems. It is built as a 4-way unit with three spool positions to handle forward, reverse, and neutral functions within NG10 manifolds. The body follows the ISO 4401-05-05-0-05 mounting pattern so it can be installed on standard sub-plates, and tightening the M6 screws to 12.5 Nm secures the interface without distortion. Electrical actuation is accomplished through a 110 VAC pilot solenoid that plugs into a DIN EN 175301-803 K4 connector, while a concealed manual override identified by code N9 lets maintenance staff shift the spool without power. Both pilot supply and pilot return are internal, designated by the ET code, which simplifies external plumbing and keeps the envelope compact. A minimum pilot pressure of 12 bar centers the spring-loaded spool, and the pilot gallery can be loaded up to 250 bar during operation.
The working ports P, A, and B tolerate pressures up to 280 bar, giving the valve capacity to control high-pressure circuits found on presses, machine tools, and mobile platforms. The internal pilot return path accepts up to 160 bar, maintaining reliable function even when back-pressure develops in the tank line. Flow stability is further influenced by a 1.0 mm throttle orifice marked B10, which dampens surges as the spool shifts. Switching dynamics can be adjusted with a discharge control feature noted as S2, allowing fine tuning of response times to match actuator demands. When the valve is fitted to a manifold, its concealed override stays shielded from accidental engagement, yet remains available for service tasks. Together, the pressure ratings, internal pilot circuitry, and discharge control provide a balanced solution for precise directional control in hydraulic automation.
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
12 bar
Mounting Pattern
ISO 4401-05-05-0-05
Mounting Screw Torque (m6)
12.5 Nm
Pilot Return
Internal (ET)
Pilot Return Max Pressure (internal, Ac)
160 bar
Pilot Solenoid Voltage
110 VAC
Pilot Supply
Internal (ET)
Spool Positions
3
Switching Time Adjustment
Discharge Control (S2)
Throttle Orifice
1.0 mm (B10)
Valve Size
NG10
Way Configuration
4-Way
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