Bosch Rexroth | 4WEH10G4X6EW110N9DK25
4WEH10G4X/6EW110N9DK25
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The 4WEH10G4X/6EW110N9DK25 directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and routes hydraulic flow in automated machinery. It withstands a maximum operating pressure of 280 bar at ports P, A, and B. With spool type G installed, the valve carries up to 130 l/min at the same pressure to supply medium-size actuators. Control oil is fed through an external X connection, and pilot oil exits through an external Y port. The Y return line tolerates pressures to 160 bar. Pilot actuation can be applied up to 250 bar and becomes effective once at least 12 bar is present in spring-centered service. Mounting follows the ISO 4401-05-05-0-05 pattern, allowing direct installation on standard subplates.
The unit operates in ambient conditions from −20 °C to +50 °C, and the permitted fluid temperature range with nitrile seals spans −20 °C to +80 °C. Hydraulic media must stay between 2.8 mm²/s and 500 mm²/s in viscosity to maintain predictable spool movement. System cleanliness is limited to ISO 4406 class 20/18/15 to protect the precision-ground lands from abrasion. An external protective coating up to 100 µm thick guards the housing against corrosion. These limits support consistent directional control in hydraulic automation where stable pilot pressure and controlled contamination levels are essential.
Technical Specifications
Ambient Temp Max
+50 °C
Ambient Temp Min
-20 °C
Cleanliness Class
ISO 4406 20/18/15
Coating Thickness Max
100 µm
Fluid Temp Max (nbr)
+80 °C
Fluid Temp Min (nbr)
-20 °C
Max Flow At 280 Bar (spool G)
130 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
12 bar
Pilot Oil Return
External Y
Pilot Oil Supply
External X
Pilot Return Y Max (ac)
160 bar
Porting Pattern
ISO 4401-05-05-0-05
Viscosity Max
500 mm²/s
Viscosity Min
2.8 mm²/s
1620 Old Apex Road
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