Bosch Rexroth | 4WEH22J7X6EW110N9EK4B10
4WEH22J7X/6EW110N9EK4/B10
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The 4WEH22J7X/6EW110N9EK4/B10 belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for hydraulic automation tasks that require controlled flow direction. Its nominal size of NG25 fixes passage dimensions adequate for medium-size circuits, and the valve can conduct up to 450 l/min according to symbol J to keep large cylinders moving quickly. Ports P, A, and B withstand 280 bar, permitting use in high-pressure lines. A porting pattern of ISO 4401-10-09-0-05 aligns with standard manifolds, while the subplate mounting style lets technicians replace the unit without disturbing pipework. Installation uses six M12 × 60 screws that spread clamping force evenly, and each screw is tightened to 100 Nm to preserve gasket compression. Electrical power reaches the solenoids through a DIN EN 175301-803 K4 connector that supports quick field wiring. With both solenoids fitted the housing weighs 11.9 kg, which guides safe handling during service.
The pilot stage tolerates 210 bar so spool shifts remain dependable even when main pressure peaks, yet spring-centered return needs at least 10.5 bar to move the spool from its neutral position. External pilot return Y may see up to 160 bar in AC circuits, so the drain line must be rated accordingly. A pilot chamber volume of 7.64 cm³ influences the response time, and a 1.0 mm throttle insert moderates pressure spikes in that chamber. Hydraulic oil cleanliness has to reach ISO 4406 20/18/15 so the spool and lands are not scored by contamination. The design secures an MTTFd of 100 years, supporting long-term use in safety-related installations.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Hydraulic Fluid Cleanliness
ISO 4406 20/18/15
Max Pressure Ports P, A, B
280 bar
Maximum Flow (symbol J)
450 l/min
Maximum Pilot Pressure
210 bar
Minimum Pilot Pressure (spring-centered)
10.5 bar
Mounting Screws
M12 × 60 (6 pcs)
Mounting Type
Subplate
Mttfd (type Weh)
100 years
Nominal Size
NG25
Pilot Return Y External Max Pressure
160 bar (AC)
Pilot Volume (spring-centered)
7.64 cm3
Porting Pattern
ISO 4401-10-09-0-05
Screw Tightening Torque
100 Nm
Throttle Insert Orifice
Ø 1.0 mm
Weight With Two Solenoids
11.9 kg
1620 Old Apex Road
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