Bosch Rexroth | 4WH10HD4XV
4WH10HD4X//V
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The 4WH10HD4X//V directional spool valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series and is intended to route pressurized fluid in hydraulic automation systems. It is produced in nominal size NG10 so passage dimensions fit medium-capacity circuits, and it passes up to 160 l/min without excessive loss. Work ports P, A, and B withstand 280 bar, while the tank port tolerates the same pressure to support back-pressure configurations. Pilot control uses an external X supply that may reach 250 bar and an external Y return path rated for 250 bar, permitting isolated pilot circuits. The spool will shift only when at least 7 bar is available in the pilot line, guaranteeing positive actuation at low system pressure. Each switching cycle moves 4.08 cm³ of pilot oil, a value that influences accumulator sizing and energy use.
The valve bolts to subplates conforming to ISO 4401-05-05-0-05, allowing quick exchange with other NG10 devices. Four M6 × 45 screws secure the body, and they are tightened to 12.5 Nm so the sealing surfaces remain leak-free under load. FKM seals provide chemical and temperature resistance compatible with common mineral oils and many synthetic fluids. System cleanliness must achieve ISO 4406 20/18/15 so the spool and lands do not score during high-cycle service. The assembly weighs 5.5 kg, light enough for one-person handling during installation or maintenance. Because pilot oil is returned externally, heat generated by throttling is kept out of the main body, aiding thermal stability. These characteristics together support modular manifold layouts in industrial and mobile equipment.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Max Flow
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure (x)
250 bar
Max Pilot Return Pressure (y)
250 bar
Max Tank Port Pressure (t)
280 bar
Min Pilot Pressure (hydraulic End Pos.)
7 bar
Mounting Interface
ISO 4401-05-05-0-05
Mounting Screws
4x M6 x 45
Nominal Size
NG10
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Pilot Volume Per Switch
4.08 cm3
Screw Tightening Torque
12.5 Nm
Seal Material
FKM
Weight
5.5 kg
1620 Old Apex Road
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