Bosch Rexroth | 4WH22J7X
4WH22J7X/
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The 4WH22J7X/ valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for hydraulic automation circuits where high flow and rapid switching are required. It is hydraulically actuated, allowing remote pilot lines to shift the spool without electric solenoids. The NG25 size interface provides passage dimensions matched to a maximum flow of 450 l/min when the J-coded spool is selected, supporting large cylinder or motor lines. Working ports P, A, and B can be loaded continuously to 280 bar, so the unit withstands common system pressures in mobile and industrial machinery. The spool is guided in a porting pattern specified as ISO 4401-08-08-0-05, simplifying manifold design and interchangeability. External pilot oil is introduced through port X, and a spring-centered three-position element needs 7.64 cm³ of pilot volume to complete a full stroke, permitting predictable response times.
For contamination control, oil entering the 4WH22J7X/ must meet ISO 4406 class 20/18/15, preventing premature wear of the sliding lands. Pilot actuation may reach 210 bar, while the spring-centered design remains responsive down to a minimum pilot pressure of 10.5 bar, giving a broad control range. The return line at port T can tolerate up to 250 bar, so backpressure from downstream resistance does not disturb spool positioning. Six mounting screws secure the valve to the subplate; each M12 × 60 fastener is tightened to 100 Nm to maintain sealing integrity under load. Overall mass is 10.5 kg, enabling one-person handling during assembly yet providing enough body stiffness for the stated ratings.
Technical Specifications
Actuation Type
Hydraulic
Cleanliness Class (iso 4406)
20/18/15
Max Flow (symbol J)
450 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Max Pressure (t Port)
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Screw Quantity
6
Mounting Screw Size
M12 x 60
Mounting Screw Torque (m12)
100 Nm
Pilot Oil Supply
External (X)
Pilot Volume (3-pos, Spring-centered)
7.64 cm3
Porting Pattern
ISO 4401-08-08-0-05
Spool Symbol
J
Valve Size
NG25
Weight (type Wh)
10.5 kg
1620 Old Apex Road
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