Bosch Rexroth | H-4WEH25D6XOF6EW110N9K4V
H-4WEH25D6X/OF6EW110N9K4/V
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The H-4WEH25D6X/OF6EW110N9K4/V belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is installed to route pressurized fluid in automated hydraulic systems. It is built in size NG25, defining mounting dimensions that match the ISO 4401-08-08-0-05 porting pattern for standardized subplates. Four flow ways are provided so pumps, actuators, and tanks can remain connected through a single valve body. The spool offers two discrete positions to alternate circuit paths, while the D symbol sets the internal cross-port flow configuration chosen for this model. Main spool return is hydraulic, eliminating external springs and enabling balanced shifting forces. A concealed manual override labeled N9 lets technicians reposition the valve when power is off. Pilot oil is supplied and returned externally to isolate control flow from the main gallery. A high-power 6E pilot control valve moves the main spool and is energized through a 110 V AC coil at 50 or 60 Hz. Electrical connection is made with a DIN EN 175301-803 plug coded K4.
The valve withstands 350 bar at ports P, A, and B, permitting use in high-pressure mobile or industrial circuits. Port T is limited to 250 bar to protect the return line and reservoir components. The pilot stage accepts pressures up to 250 bar, and reliable actuation begins once 8 bar is available at the hydraulic end. Fluid delivered to the valve must reach ISO 4406 class 20/18/15 cleanliness so sliding surfaces remain free of abrasive particles. FKM seals are fitted to resist heat and common hydraulic oils, maintaining leak-tight operation over long duty cycles.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Control Spool Return (main)
Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p/a/b)
350 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (hydraulic End)
8 bar
Pilot Control Valve
6E (High-Power)
Pilot Oil Return
External
Pilot Oil Supply
External
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM
Size
NG25
Spool Positions
2
Spool Symbol
D
Supply Voltage (pilot Valve)
110 V AC (50/60 Hz)
Ways
4
1620 Old Apex Road
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