Bosch Rexroth | 4WEH22J7X6EW110N9ES2K4B10
4WEH22J7X/6EW110N9ES2K4/B10
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The 4WEH22J7X/6EW110N9ES2K4/B10 directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and governs flow paths in hydraulic automation circuits. It is built in nominal size NG25 to suit medium-frame manifolds, and the J-coded spool passes a maximum flow of 450 l/min for fast cylinder or motor response. The main ports P, A, and B tolerate 280 bar, allowing use in high-pressure systems. Pilot oil is supplied internally, while the return is routed externally to keep control pressure stable. A mounting face that follows ISO 4401-08-08-0-05 enables direct interchange with standardized subplates. The design handles hydraulic media with viscosities between 2.8 and 500 mm²/s without jeopardizing shift reliability.
The valve functions in ambient temperatures from −20 to +50 °C and connects electrically through a DIN EN 175301-803 K4 plug. A concealed manual override identified as N9 lets maintenance staff reposition the spool during power loss. The pilot circuit accepts pressures up to 210 bar, and port T withstands 250 bar when backpressure occurs. Spring-centering requires a minimum pilot pressure of 10.5 bar to initiate movement. Switching dynamics can be tuned with discharge control S2, and a 1.0 mm throttle insert coded B10 limits pilot flow to smooth the transition between positions.
Technical Specifications
Ambient Temperature Range (nbr)
–20 to +50 °C
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (symbol J)
450 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Nominal Size
NG25
Pilot Oil Return
External
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-08-08-0-05
Spool Symbol
J
Switching Time Adjustment
Discharge Control (S2)
Throttle Insert
Ø 1.0 mm (B10)
Viscosity Range
2.8 to 500 mm²/s
1620 Old Apex Road
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