Bosch Rexroth | 4WEH22D7XOF6EW110N9K4B10
4WEH22D7X/OF6EW110N9K4/B10
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The 4WEH22D7X/OF6EW110N9K4/B10 directional spool valve is produced by Bosch Rexroth in the WEH Directional Spool Valves series. It serves to shift hydraulic flow paths in automated circuits using electro-hydraulic actuation so electrical signals can command fluid movement. The valve provides a 4/2-way function and is built in size NG 25 to fit medium-flow manifolds. Its mounting interface follows the ISO 4401-08-08-0-05 porting pattern, allowing direct substitution in standardized subplates. The main ports p, A, and B withstand up to 280 bar, while pilot flow is fed from an external X connection and returns through an external Y line to separate control and tank channels. Control stability is supported by the 6E high-power pilot valve equipped with an OF detent that holds the spool position without continuous energization.
Electrical connection is made through a DIN EN 175301-803 type K4 plug, simplifying field wiring to solenoids. A concealed N9 manual override lets maintenance personnel shift the spool mechanically when power is absent. The pilot stage tolerates pressures up to 210 bar and requires at least 11 bar to shift the spring-centered spool, ensuring reliable actuation across normal system ranges. Port T is rated for 250 bar to handle elevated tank back-pressure, whereas port Y in the control circuit is limited to 160 bar to protect pilot components. These pressure limits, combined with the standardized connector and override, make the valve suitable for machine tools, presses, and other installations needing dependable directional control under variable load conditions.
Technical Specifications
Actuation Type
Electro-Hydraulic
Electrical Connector
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Max Pressure Port T
250 bar
Max Pressure Port Y (ac)
160 bar
Min Pilot Pressure (2-spool Spring End)
11 bar
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Pilot Valve Detent
OF (Detent)
Pilot Valve Version
6E High-Power
Porting Pattern
ISO 4401-08-08-0-05
Size
NG 25
Valve Function
4/2-Way
1620 Old Apex Road
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