Bosch Rexroth | 4WH22E7XV-SO43A-1651
4WH22E7X/V SO43A-1651
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The 4WH22E7X/V SO43A-1651 valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series and serves to route hydraulic oil in automated machinery. Its internal element is shifted by hydraulic pilot actuation, allowing remote control from a separate pressure line. With a nominal size of NG 25, the housing fits manifold cavities that accommodate 25 mm flow paths. The spool provides three selectable positions in the E configuration, giving operators neutral and two working states for controlled cylinder or motor movement. A porting interface to ISO 4401-08-08-0-05 standard aids interchangeability, while external pilot supply at port X and external pilot return at port Y separate control pressure from main flow. The design supports up to 450 l/min, making it suitable for high-capacity circuits.
Working ports P, A, and B tolerate operating pressures to 280 bar, so the valve can handle medium-pressure power units without overstressing the body. Pilot pressure may reach 210 bar and must exceed 10.5 bar to ensure consistent spool shift even under back-pressure conditions. FKM sealing elements resist heat and synthetic hydraulic fluids, preserving leak-free operation over long service intervals. Installation requires six M12 × 60 screws conforming to ISO 4762, and each fastener is tightened to 100 Nm to maintain the gasketed interface against full system pressure. These mechanical and hydraulic limits define safe integration of the 4WH22E7X/V SO43A-1651 valve in industrial automation lines.
Technical Specifications
Actuation Type
Hydraulic (Pilot)
Max Flow
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure
10.5 bar
Mounting Screws
6x M12 x 60 (ISO 4762)
Nominal Size
NG 25
Pilot Return
External (Y)
Pilot Supply
External (X)
Porting Pattern
ISO 4401-08-08-0-05
Screw Tightening Torque
100 Nm
Seal Material
FKM
Spool Positions
3
Spool Symbol
E
1620 Old Apex Road
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