Bosch Rexroth | 4WH10HC4X
4WH10HC4X/
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The 4WH10HC4X/ directional valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for hydraulic automation circuits. It directs flow between four ports using a C-type control spool that offers two discrete positions to shift actuator functions. The unit is hydraulically actuated, and the spool is also returned to its neutral or alternate state by hydraulic pilot pressure rather than a spring. External pilot oil enters through port X while return oil leaves through port Y, keeping control lines separate from the main flow. The valve conforms to the ISO 4401-05-05-0-05 porting pattern, so it mounts on standard NG10 manifolds.
With a nominal size of NG10, the valve handles operating pressures up to 280 bar on pressure, service, and tank lines alike, enabling uniform ratings throughout the circuit. It accommodates peak flows of 160 l/min without exceeding the stated limits. The pilot stage works between 7 bar minimum and 250 bar maximum to ensure reliable actuation across varied system conditions. Installation is specified horizontally to maintain correct internal drainage. Fluid cleanliness must meet ISO 4406 class 20/18/15 to avoid spool sticking or wear. Overall, these parameters define a compact directional element ready for externally piloted, medium-capacity hydraulic systems.
Technical Specifications
Actuation
Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Control Spool Return
Hydraulic
Installation Position
Horizontal
Max Operating Pressure (p, A, B)
280 bar
Max Operating Pressure (t)
280 bar
Maximum Flow
160 l/min
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure
7 bar
Nominal Size
NG10
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-05-05-0-05
Spool Positions
2
Spool Symbol
C
Ways
4
1620 Old Apex Road
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