Bosch Rexroth | 4WEH22E7X6EW110N9ETDK25B10-AN
4WEH22E7X/6EW110N9ETDK25/B10 AN
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The 4WEH22E7X/6EW110N9ETDK25/B10 AN is a 4-way directional spool valve produced by Bosch Rexroth within the WEH Directional Spool Valves series. Designed for electro-hydraulic actuation, it controls high flow circuits in automated hydraulic systems. The NG25 (W.H 22) size accommodates a maximum flow of 450 l/min when operated with symbol E. For rapid shifting, the internal pilot oil supply designated ET delivers 35 l/min, while the internal pilot oil return labeled T routes the pilot fluid back to tank. Installation follows the ISO 4401 mounting pattern using six M12 × 60 screws according to ISO 4762. These hardware provisions allow secure block mounting on manifolds without external piping modifications.
The valve withstands operating line pressures up to 280 bar at ports P, A, and B, and the pilot stage tolerates up to 210 bar while remaining spring-centered once the pilot pressure falls below the 10.5 bar minimum. A concealed manual override identified by code N9 permits local actuation when electrical signals are absent. The throttle insert coded B10 contains a 1.0 mm orifice that limits inlet flow for controlled metering. Surface coating is limited to 100 µm to maintain dimensional accuracy and corrosion resistance. Final assembly requires each mounting screw to be tightened to 100 Nm so the interface seals withstand the specified pressures without leakage.
Technical Specifications
Actuation
Electro-Hydraulic (WEH)
Manual Override
Concealed (N9)
Max Flow (symbol E, Ng25)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Pattern
ISO 4401
Mounting Screws
6x M12 × 60 (ISO 4762)
Pilot Flow For Shortest Switching Time
35 l/min
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Screw Tightening Torque
100 Nm
Size
NG25 (W.H 22)
Surface Coating Thickness
100 µm Max
Throttle Insert
Ø 1.0 mm (B10)
Valve Type
4-Way Directional Spool Valve
1620 Old Apex Road
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