Bosch Rexroth | 4WEH22HY7X6EW110N9ETDAB12V
4WEH22HY7X/6EW110N9ETDA/B12V
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The 4WEH22HY7X/6EW110N9ETDA/B12V valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series and serves as a 4-way control element in hydraulic automation. Electro-hydraulic actuation allows an electric signal to shift the spool while pilot oil supplies the force required for movement. The valve uses a hydraulic return system to bring the spool back to its rest position, creating dependable spring-less operation. Two selectable spool positions provide straightforward switching between flow paths, and the Y spool symbol specifies the internal port connections created in each position. A nominal size of NG25 accommodates medium to high flow circuits, while subplate mounting lets the unit drop onto standardized bases for quick exchange. Internal pilot oil feed eliminates external pilot lines, and a concealed N9 manual override lets technicians move the spool during commissioning or power loss. A 1.2 mm throttle insert moderates pilot flow to reduce pressure spikes.
The unit carries a maximum flow rating of 450 l/min, so it can drive large cylinders or motors without excessive pressure loss. Main ports A and B withstand operating pressures up to 350 bar, allowing installation in high-pressure power packs. The pilot stage tolerates 210 bar to keep actuation responsive, and its internal return gallery handles up to 160 bar without leakage risk. An ISO 4401-08-08-0-05 porting pattern matches common subplates, ensuring interchangeability with other NG25 components. Six M12 × 60 screws to ISO 4762 standards anchor the valve body and maintain seal compression under load. These pressure, flow, and mounting parameters combine to deliver consistent control performance in demanding industrial hydraulic systems.
Technical Specifications
Actuation Type
Electro-Hydraulic
Control Spool Return
Hydraulic
Manual Override
Concealed (N9)
Max Flow (hy, Ng25 W.h 22)
450 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
210 bar
Max Pilot Return Pressure (y Internal)
160 bar
Mounting Interface
Subplate
Mounting Screws
6 × M12 × 60 (ISO 4762)
Nominal Size
NG25 (W.H 22)
Pilot Oil Configuration
Internal (ET)
Porting Pattern
ISO 4401-08-08-0-05
Spool Positions
2 Positions
Spool Symbol
Y
Throttle Insert
Ø1.2 mm (B12)
Way Configuration
4-Way
1620 Old Apex Road
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