Bosch Rexroth | H-4WH32J6X
H-4WH32J6X/
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The H-4WH32J6X/ directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated systems that require reliable switching between supply and actuator lines. The valve handles a maximum operating pressure of 350 bar at ports P, A, and B, allowing it to work in high-pressure manifolds. A maximum flow capacity of 1100 l/min supports large volume circuits with minimal pressure drop. The porting pattern follows ISO 4401-10-09-0-05, so the unit fits standard subplates without additional machining. Fluid temperature may rise to 80 °C, and surrounding ambient may reach 50 °C without derating. Proper operation depends on oil cleanliness kept to ISO 4406 code 20/18/15, while viscosity should stay between 2.8 and 500 mm²/s to keep internal clearances lubricated.
Pilot actuation data further defines system limits: the three-position spring-centered version needs at least 8.5 bar to shift, and pilot supply must not exceed 250 bar. Ports T and Y are also limited to 250 bar to protect the return and drain lines. Six mounting screws secure the housing; Bosch Rexroth specifies M20 × 80 bolts tightened to 340 Nm to preserve gasket compression and alignment. The hydraulic-actuated model weighs 39.5 kg, so lifting points should be used during assembly. These mechanical figures, combined with the pressure limits cited earlier, define how the valve integrates into manifolds and keeps actuator switching precise in automated hydraulic stations.
Technical Specifications
Ambient Temperature Max
+50 °C
Cleanliness Class (iso 4406)
20/18/15
Fluid Temperature Max (ports)
+80 °C
Maximum Flow
1100 l/min
Maximum Operating Pressure (p,a,b)
350 bar
Maximum Pilot Pressure
250 bar
Maximum Pressure Port T
250 bar
Maximum Pressure Port Y
250 bar
Minimum Pilot Pressure (3-pos Spring-centered)
8.5 bar
Mounting Screw Count
6
Mounting Screw Size
M20 x 80
Mounting Screw Torque
340 Nm
Porting Pattern
ISO 4401-10-09-0-05
Viscosity Maximum
500 mm2/s
Viscosity Minimum
2.8 mm2/s
Weight (hydraulic Actuation)
39.5 kg
1620 Old Apex Road
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