Bosch Rexroth | H-4WEH25E6X6EW110N9S2K4V
H-4WEH25E6X/6EW110N9S2K4/V
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The H-4WEH25E6X/6EW110N9S2K4/V valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits using electro-hydraulic actuation so that a low-powered solenoid signals a higher-pressure pilot stage. The unit is built in nominal size NG25, enabling it to fit manifolds designed for that cavity. A 6E pilot valve manages the pilot flow, and both supply and return lines for the pilot oil are arranged externally to simplify maintenance on the main body. The spool follows symbol E to provide a defined center position for system blocking or flow paths. A concealed manual override identified as N9 permits local shifting during commissioning without exposing moving parts. Minimum pilot pressure is 13 bar to ensure the spool reaches its end position under all load conditions.
Maximum operating limits are 350 bar on ports P, A, and B, 250 bar on port T when the return is external, and 160 bar on port Y, allowing the valve to tolerate the common pressure hierarchy in mobile and industrial hydraulics. Pilot supply may reach up to 250 bar so the control stage can handle high differential forces. Switching speed is tuned with discharge control coded S2, letting the user adjust timing without additional orifice plates. Electrical connection is made through a DIN EN 175301-803 K4 plug, and the required cleanliness level is ISO 4406 class 20/18/15 to avoid premature wear of sliding members. Installation uses six M12 × 60 screws per ISO 4762, anchoring the 19.0 kg housing securely to the sub-plate.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Port P/a/b Pressure
350 bar
Max Port T Pressure (y External)
250 bar
Max Port Y Pressure (ac)
160 bar
Maximum Pilot Pressure
250 bar
Min Pilot Pressure (x External)
13 bar
Mounting Screws
6 × M12 × 60 (ISO 4762)
Nominal Size
NG25
Pilot Oil Supply/return
External/External
Pilot Valve
6E
Spool Symbol
E
Switching Time Adjustment
Discharge Control (S2)
Weight
19.0 kg
1620 Old Apex Road
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