Bosch Rexroth | 4WHD10J3XB1212
4WHD10J3X/B12/12
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The 4WHD10J3X/B12/12 valve belongs to the WHD Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation tasks that require controlled flow direction. It uses nominal size 10 passages to match medium-capacity circuits, and its subplate interface follows the ISO 4401-05-04-0-05 mounting pattern so installers can fit it to standardized manifolds. The spool can travel 5.5 mm, allowing full opening at a maximum flow rate of 120 l/min, while the main ports p, a, and b withstand up to 315 bar during continuous service. Pilot operation needs 3.83 cm³ of control oil per shift and remains functional between 10 bar and 100 bar pilot pressure limits, enabling reliable actuation from common pilot stages.
Continuous operation is permitted up to 80 °C, and the body tolerates short peaks to 170 °C; under that peak temperature the allowable system pressure is 100 bar to protect seals and spool fit. The t-port is rated for 160 bar so case drain lines can handle back-pressure without damage. Specified mineral oils in the HL or HLP classes per DIN 51524 serve as the working fluid, and oil cleanliness must meet ISO 4406 20/18/15 to maintain switching accuracy. The unit weighs 3.0 kg, which eases handling during maintenance, and the prescribed fastening torque of 9 Nm secures it to the manifold without deforming the housing.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Continuous Operating Temp (max)
80 C
Fastening Torque
9 Nm
Hydraulic Fluid
Mineral Oil (HL, HLP) DIN 51524
Mass (1 Actuation Cylinder)
3.0 kg
Max Flow Rate
120 l/min
Max Operating Pressure (p,a,b)
315 bar
Max Pilot Pressure
100 bar
Max Pressure (t Port)
160 bar
Max Pressure At 170 C
100 bar
Min Pilot Pressure
10 bar
Mounting Pattern
ISO 4401-05-04-0-05
Nominal Size
10
Pilot Control Volume
3.83 cm3
Short-term Operating Temp (max)
170 C
Spool Stroke
5.5 mm
1620 Old Apex Road
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