Bosch Rexroth | 4WEH22HD7XOF6EW110N9DAL
4WEH22HD7X/OF6EW110N9DAL
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The 4WEH22HD7X/OF6EW110N9DAL valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth. It directs hydraulic flow between actuator ports in automation circuits that need rapid and repeatable switching. The unit is built in nominal size NG25, identified in the series as W.H 22, so it matches manifolds sized for medium-to-high flow machinery. Its 4-way configuration provides separate pressure, tank, and two work lines, while two spool positions supplied by the hydraulic end allow either work port to be pressurized. The D coded spool gives a distinct overlap characteristic required by many industrial actuators. Connection to subplates follows the ISO 4401-08-08-0-05 pattern, allowing interchange with standardized hardware. The main flow paths sustain up to 280 bar, and pilot passages accept pressures up to 210 bar, but shift reliably as soon as 8 bar pilot pressure is available.
Rated for demanding duty cycles, the valve passes as much as 450 l/min without exceeding its hydraulic envelope. The design accommodates oil viscosities from 2.8 mm²/s up to 500 mm²/s, so both light break-in fluids and heavy mineral stocks can be used. Operating fluid may enter the body at temperatures down to -20 °C during cold starts and up to +80 °C once the system reaches full load. When the external drain port Y is selected, return pressure must remain below 160 bar to avoid back-driving the pilot stage. Secure mounting depends on six M12 × 60 screws; each is tightened to 100 Nm to withstand the full working pressure without joint movement. Observing these mechanical limits allows the 4WEH22HD7X/OF6EW110N9DAL to provide stable, high-volume direction control in hydraulic automation.
Technical Specifications
Max Flow
450 l/min
Max Fluid Temperature (nbr)
+80 °C
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Max Pressure Port Y (external)
160 bar
Min Fluid Temperature (nbr)
−20 °C
Min Pilot Pressure (hydraulic End)
8 bar
Mounting Screw Torque
100 Nm
Mounting Screws
M12 × 60 (6 pcs)
Nominal Size
NG25 (W.H 22)
Porting Pattern
ISO 4401-08-08-0-05
Spool Positions
2 (hydraulic end)
Spool Symbol
D
Viscosity Max
500 mm²/s
Viscosity Min
2.8 mm²/s
Way Configuration
4-way
1620 Old Apex Road
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