Bosch Rexroth | H-4WEH25E6X6EG24N9ETDK25LB10D3V-AN
H-4WEH25E6X/6EG24N9ETDK25L/B10D3V AN
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The H-4WEH25E6X/6EG24N9ETDK25L/B10D3V AN directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated circuits where precise on-off control is required. Electro-hydraulic actuation enables the main spool to shift under pilot pressure generated by a 24 V DC solenoid coil, so electronic controllers can trigger movement without large mechanical forces. The 4-way layout directs pressure, tank, and two work ports to handle bidirectional cylinder motion, while the NG25 nominal size matches medium-flow manifolds. A porting pattern compliant with ISO 4401-08-08-0-05 simplifies mounting to standardized subplates, and a concealed manual override lets technicians reposition the spool during commissioning or power loss. An internal Ø 1.0 mm throttle insert meters pilot oil to damp switching shocks, and FKM sealing resists high-temperature fluids.
The valve withstands system pressures up to 350 bar so it suits high-torque drives, while the pilot stage operates safely between 13 bar and 250 bar to guarantee dependable spool shift across varying loads. An integrated 6E pilot control valve provides the directional logic for the pilot oil, and both pilot supply and return are routed internally to eliminate external lines in compact manifolds. Internal return paths are rated for 210 bar in DC service, preventing back-pressure-induced malfunctions. A D3 pressure reducing valve limits pilot circuit pressure to 45 bar, protecting the solenoid and seals from overload. These pressure management features let the unit maintain stable flow direction in hydraulic machinery that cycles rapidly under fluctuating loads.
Technical Specifications
Actuation Type
Electro-Hydraulic
Coil Voltage
24 V DC
Manual Override
Concealed (N9)
Maximum Operating Pressure
350 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure
13 bar
Nominal Size
NG25
Pilot Control Valve
6E
Pilot Oil Return
Internal (ET)
Pilot Oil Supply
Internal (ET)
Pilot Return Pressure (y Internal)
210 bar (DC)
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve
D3 (45 bar)
Seal Material
FKM (V)
Throttle Insert
Ø 1.0 mm (B10)
Way Configuration
4-way
1620 Old Apex Road
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