Bosch Rexroth | 4WH10J4X
4WH10J4X/
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The 4WH10J4X spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits that require NG10 mounting dimensions, and it employs a porting pattern conforming to ISO 4401-05-05-0-05 to fit standard manifold blocks. The unit contains three spool positions so actuators can move, hold, or return to neutral as commanded. When the spool is spring-centered the valve passes up to 160 l/min, supporting medium-flow machinery. Channels p, a, and b tolerate operating pressures up to 280 bar, enabling reliable motion under high load. Pilot pressure can reach 250 bar, allowing external control signals to shift the spool without delay. Hydraulic fluid may range from 2.8 mm²/s to 500 mm²/s, and the permitted temperature span inside the valve extends from −20 °C to +80 °C to cover cold starts and warmed reservoirs.
Ambient service conditions for the 4WH10J4X are limited to −20 °C to +50 °C, protecting seals during outdoor installation. System cleanliness must remain at ISO 4406 code 20/18/15 to minimize spool wear. The spring-centered mechanism needs at least 12 bar pilot pressure to shift from neutral, and external port Y carries a 250 bar limit for safe drainage. Port T withstands 280 bar, preventing damage when return lines develop high back-pressure. These pressure allowances, combined with the NG10 size and standardized port layout, let the valve deliver consistent directional control in automated hydraulic equipment.
Technical Specifications
Ambient Temperature Max (nbr)
+50 C
Ambient Temperature Min (nbr)
-20 C
Cleanliness Class
ISO 4406 20/18/15
Hydraulic Fluid Temp Max (nbr)
+80 C
Hydraulic Fluid Temp Min (nbr)
-20 C
Max Flow (j, Spring-centered)
160 l/min
Max Fluid Viscosity
500 mm2/s
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
280 bar
Max Pressure Port Y (external)
250 bar
Min Fluid Viscosity
2.8 mm2/s
Min Pilot Pressure (spring-centered)
12 bar
Porting Pattern
ISO 4401-05-05-0-05
Size
NG10
Spool Positions
3
1620 Old Apex Road
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