Bosch Rexroth | H-4WEH25E6X6EW110N9ETDAB08D3V
H-4WEH25E6X/6EW110N9ETDA/B08D3V
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The H-4WEH25E6X/6EW110N9ETDA/B08D3V valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for hydraulic automation where directional control of pressurized oil is required. Its 110 V AC, 50/60 Hz coil energizes a high-power 6E pilot valve that shifts the NG25 main spool to alter flow paths on command. A porting pattern of ISO 4401-08-08-0-05 matches common subplates, while the internal pilot oil supply from port P and internal return to port T eliminate external pilot lines. The unit includes a concealed N9 manual override so technicians can move the spool mechanically during setup without compromising enclosure integrity. FKM sealing material resists heat and mineral oil, and a Ø 0.8 mm B08 throttle insert meters pilot flow to moderate actuation speed and damp pressure surges.
The valve accepts line pressures up to 350 bar at ports P, A, and B, while the pilot stage is limited to 250 bar and its internal return circuit must remain below 160 bar. A spring-centered, three-position configuration allows safe neutralization when de-energized but requires at least 13 bar pilot pressure to overcome the centering spring. An integrated pressure-reducing valve holds the pilot supply to 45 bar, protecting the solenoid and spool assembly from excess load. Installation calls for tightening the mounting screws to 100 N·m to maintain gasket compression under cyclic pressure. With both solenoids fitted, the assembly weighs 19.0 kg, so support brackets or lifting aids may be needed during service.
Technical Specifications
Coil Voltage
110 V AC (50/60 Hz)
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (internal)
160 bar
Min Pilot Pressure (3-pos, Spring-centered)
13 bar
Mounting Screw Torque
100 Nm
Nominal Size
NG25
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (P)
Pilot Valve Type
6E (High-Power)
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve Setting
45 bar
Sealing Material
FKM
Throttle Insert
Ø 0.8 mm (B08)
Weight (2 Solenoids)
19.0 kg
1620 Old Apex Road
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