Bosch Rexroth | 4WEH22P7X6EW110N9DA
4WEH22P7X/6EW110N9DA
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The 4WEH22P7X/6EW110N9DA is produced by Bosch Rexroth for the WEH Directional Spool Valves series and guides hydraulic flow in automated equipment. The valve uses electro-hydraulic actuation so a solenoid-driven pilot shifts the main spool without large electrical loads. External pilot supply isolates the control stage from the working lines for consistent switching. The ISO 4401-08-08-0-05 porting pattern fits standard NG25 sub-plates, and nominal size NG25 supports compact manifold layouts. A 4-way path with three spool positions allows forward, neutral, and reverse flow, while the P-coded spool geometry sets the overlap during transition. Maximum flow reaches 170 l/min at 280 bar, and continuous pressure on ports P, A, and B can also reach 280 bar to suit high-duty actuators.
A concealed manual override lets technicians shift the spool during setup or fault finding without energizing the pilot. The pilot stage tolerates up to 210 bar, yet spring-centered return only needs 10.5 bar, reducing standby energy use. Port T can handle back-pressure to 250 bar and the Y drain remains safe up to 160 bar, so the valve functions reliably in circuits with elevated return pressures. Mounting uses four M12 × 60 screws, and tightening to 100 Nm keeps the interface sealed against system loads.
Technical Specifications
Actuation Type
Electro-Hydraulic
Manual Override
Concealed
Max Flow (spool P, 280 Bar)
170 l/min
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Pressure
210 bar
Max Port T Pressure
250 bar
Max Port Y Pressure (ac)
160 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Screw Size
M12 x 60
Mounting Screw Torque
100 Nm
Nominal Size
NG25
Pilot Supply
External
Porting Pattern
ISO 4401-08-08-0-05
Spool Positions
3
Spool Symbol
P
Way Configuration
4-Way
1620 Old Apex Road
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