Bosch Rexroth | 4WEH22H7X6EW110N9DA
4WEH22H7X/6EW110N9DA
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The 4WEH22H7X/6EW110N9DA valve is produced by Bosch Rexroth as part of the WEH Directional Spool Valves series. It controls actuator motion by routing oil in hydraulic automation systems. The unit is built in nominal size NG25, giving flow capacity for medium-to-large circuits. Its configuration offers 4 ways and 2 positions according to spool symbol D, so flow can be directed to either service line or blocked as required. The main spool is returned by hydraulic pressure instead of a mechanical spring, which supports smooth shifting under load. A type 6E pilot valve moves the spool when the 110 V AC 50/60 Hz solenoid is energized. Local intervention is possible through a concealed manual override. Mounting is on an ISO 4401-08-08-0-05 interface suitable for stack or manifold assemblies.
Pilot functions are supplied from external lines and drained externally, isolating the pilot circuit from main flow and simplifying pressure management. Maximum operating pressure reaches 350 bar at ports P, A, and B, while ports T and Y connected externally are limited to 250 bar. The pilot stage itself accepts up to 250 bar, yet reliable actuation begins at a minimum pilot pressure of 8 bar for this two-position NG25 model. Compatibility with the NFPA T3.5.1 R2 D08 mounting pattern lets the valve align with North American subplates. Together these ratings allow the valve to switch high-pressure flows while keeping pilot control stable and separated from tank return lines.
Technical Specifications
Coil Voltage
110 V AC 50/60 Hz
Main Spool Return
Hydraulic
Manual Override
Concealed
Max Pilot Pressure
250 bar
Max Pressure (p,a,b)
350 bar
Max Pressure (t, Y External)
250 bar
Min Pilot Pressure (2-pos, Ng25)
8 bar
Nfpa Interface
T3.5.1 R2 D08
Nominal Size
NG25
Pilot Oil Drain
External
Pilot Oil Supply
External
Pilot Valve
Type 6E
Porting Pattern
ISO 4401-08-08-0-05
Positions
2
Spool Symbol
D
Ways
4
1620 Old Apex Road
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