Bosch Rexroth | 4WH10E4X
4WH10E4X/
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The 4WH10E4X/ directional spool valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth. It directs hydraulic flow in automation circuits and is actuated hydraulically to fit systems that already provide pilot pressure. The valve mounts on manifolds that follow the ISO 4401-05-05-0-05 porting pattern so interchangeability is straightforward. During operation ports P, A, and B can be pressurized up to 280 bar, and a maximum flow of 160 l/min is handled in NG10 three-position service. External line X feeds the pilot oil while external line Y returns it, which simplifies pressure balancing in complex circuits. Pilot stages accept pressures up to 250 bar and, when spring-centered in a three-position version, they shift once at least 12 bar is present. These characteristics let the valve control sizable actuators without adding internal relief components.
Hydraulic fluid used with the valve should meet an ISO 4406 cleanliness level of 20/18/15 to preserve spool fit and sealing. Acceptable operating temperatures range from −20 °C to +80 °C, allowing installation in equipment exposed to seasonal or process heat variation. Viscosity may vary between 2.8 mm²/s and 500 mm²/s, giving users latitude in oil selection while still maintaining predictable response. The T port tolerates back pressure up to 280 bar, whereas the Y drain line is limited to 250 bar, so circuit designers must size downstream components accordingly. The NG10 housing weighs 5.5 kg, which supports direct mounting on subplates without additional brackets. Combined, these limits define the working envelope for the 4WH10E4X/ valve in industrial motion control systems.
Technical Specifications
Actuation
Hydraulic
Fluid Cleanliness (iso 4406)
20/18/15
Hydraulic Fluid Temp Max (nbr)
+80 C
Hydraulic Fluid Temp Min (nbr)
-20 C
Max Operating Pressure (p, A, B)
280 bar
Max Port T Pressure
280 bar
Max Port Y Pressure
250 bar
Maximum Flow (ng10, 3-pos)
160 l/min
Maximum Pilot Pressure
250 bar
Maximum Viscosity
500 mm2/s
Minimum Pilot Pressure (3-pos, Spring)
12 bar
Minimum Viscosity
2.8 mm2/s
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-05-05-0-05
Weight (type Wh, Ng10)
5.5 kg
1620 Old Apex Road
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