Bosch Rexroth | 4WHD10M3X12
4WHD10M3X/12
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The 4WHD10M3X/12 directional spool valve is produced by Bosch Rexroth within the WHD Directional Spool Valves series. It directs hydraulic flow in industrial automation circuits and supports duties up to 120 l/min, providing adequate volume for medium-size actuators. A spool stroke of 5.5 mm sets the travel needed to open or close the flow paths and maintains consistent response time. Subplate installation follows the ISO 4401-05-04-0-05 pattern so the valve seats directly on standard manifolds. Line ports P, A, and B withstand 315 bar when the fluid temperature is at or below 80 °C, while port T tolerates 160 bar under the same condition, permitting safe return-line operation. When the fluid exceeds 80 °C the allowable operating pressure falls to 100 bar to protect sealing elements. The permitted temperature span of −20 °C to +80 °C and a viscosity ceiling of 500 mm²/s define the acceptable hydraulic medium and ensure reliable shifting across seasonal changes.
Pilot actuation requires a supply between 10 and 100 bar, enabling the valve to function in low-pressure control circuits yet preventing inadvertent movement below the minimum threshold. Each switching cycle displaces a control volume of 3.83 cm³, information used to size pilot lines and accumulators. The housing is fixed with M6 × 40 screws, and these bolts must be tightened to 9 Nm to maintain gasket compression without overstressing the threads. Installation is flexible because the valve may be mounted in any orientation, simplifying layout on crowded power units. Cleanliness requirements match ISO 4406 class 20/18/15, so filters must limit particulate contamination to preserve spool clearance and extend service life. Together, these parameters let the 4WHD10M3X/12 integrate into hydraulic manifolds with predictable pressure losses, secure fastening, and a contamination control strategy that upholds Bosch Rexroth reliability.
Technical Specifications
Bolt Tightening Torque
9 Nm
Control Volume
3.83 cm3
Flow Rate, Max
120 l/min
Installed Position
Any
Mounting Bolts
M6x40
Mounting Pattern
ISO 4401-05-04-0-05
Operating Pressure, Max (>=80 °c)
100 bar
Pilot Pressure, Max
100 bar
Pilot Pressure, Min
10 bar
Port P/a/b Pressure, Max (<=80 °c)
315 bar
Port T Pressure, Max (<=80 °c)
160 bar
Pressure Fluid Temp, Max
+80 °C
Pressure Fluid Temp, Min
-20 °C
Purity Class
ISO 4406 20/18/15
Spool Stroke
5.5 mm
Viscosity, Max
500 mm2/s
1620 Old Apex Road
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