Bosch Rexroth | H-4WEH10E4X6EW110N9EDALB10D3
H-4WEH10E4X/6EW110N9EDAL/B10D3
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The H-4WEH10E4X/6EW110N9EDAL/B10D3 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It routes pressurized fluid in hydraulic automation systems that require dependable actuation of cylinders and motors. The unit is classified as nominal size NG10 so it fits sub-plates designed for that flow class. It employs a 4/3-way spool with Symbol E, allowing two working ports to be blocked in the center position while pressure is passed to tank. A maximum flow capacity of 160 l/min accommodates medium-to-high volume circuits, and a permitted operating pressure of 350 bar on ports P, A, and B supports high-load motion tasks. Pilot commands come from a 4WE6 high-power valve, code 6E, which is supplied internally with pilot oil and vents externally. The hydraulic medium must reach cleanliness class 20/18/15 per ISO 4406 to prevent wear and maintain switching accuracy.
For dynamic response, the pilot stage tolerates pressures up to 250 bar and begins reliable centering at 12 bar when the spring-centered main spool is used. Achieving the shortest switching time requires a pilot flow of 35 l/min, assisted by an internal pressure reducer that stabilizes the secondary pilot circuit at 45 bar. A throttle insert with a 1.0 mm orifice, code B10, can be fitted to moderate flow peaks if the supply is unstable. Installation follows the ISO 4401-05-05-0-05 interface, and the M6 mounting bolts must be tightened to 12.5 Nm according to ISO 4762 to secure the housing without distortion. A concealed manual override designated N9 lets maintenance personnel shift the spool during commissioning or in case of electrical failure while preventing accidental actuation in service.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Manual Override
Concealed (N9)
Max Flow (ng10, Symbol E)
160 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
12 bar
Mounting Bolt Torque
12.5 Nm (M6, ISO 4762)
Mounting Interface
ISO 4401-05-05-0-05
Nominal Size
NG10
Pilot Control Valve Type
4WE6 High-Power (6E)
Pilot Flow For Shortest Switching Time
35 l/min
Pilot Oil Return
External (Code E)
Pilot Oil Supply
Internal (Code E)
Pressure Reducer Secondary Pressure
45 bar
Spool Function
4/3-Way (Symbol E)
Throttle Insert Orifice
1.0 mm (B10)
1620 Old Apex Road
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