Bosch Rexroth | H-4WEH25J6X6EW110N9ETDA10B10D3V
H-4WEH25J6X/6EW110N9ETDA/10B10D3V
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The H-4WEH25J6X/6EW110N9ETDA/10B10D3V directional valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. It uses electro-hydraulic actuation to shift its spool, allowing remote electrical control of hydraulic flow in automation circuits. The 4-way configuration permits separate pressure, return, and two service ports so actuators can reverse. A J spool symbol defines the metering edges that set the flow paths in each position. With a nominal size of NG25, the valve fits circuits that require medium to high flow rates while maintaining manageable installation dimensions. The unit handles operating pressures up to 350 bar at ports P, A, and B, enabling use in high-pressure systems. At that pressure it passes up to 520 l/min, supporting large cylinder or motor demands. A high-power 6E pilot valve supplies the shifting force needed to move the main spool under full pressure. Mounting follows the ISO 4401-08-08-0-05 porting pattern, ensuring interchangeability with standard subplates.
Pilot oil is supplied and returned internally, identified by the ET code, which eliminates external pilot lines and simplifies manifold layouts. The pilot stage tolerates pressures up to 250 bar, while a minimum of 13 bar is required to recentralize the spring-centered spool. An integrated D3 pressure reducing valve limits pilot pressure to 45 bar to protect the pilot circuit from surges. A Ø1.0 mm B10 throttle insert restricts pilot flow, improving stability during spool transitions. A concealed N9 manual override lets maintenance personnel shift the valve locally without exposing moving parts. The hydraulic cleanliness requirement is 20/18/15 per ISO 4406, which calls for fine filtration to prevent wear of precision surfaces. These features together allow the valve to operate reliably in automated machines that depend on consistent directional control under fluctuating load conditions.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
20/18/15 (ISO 4406)
Manual Override
Concealed (N9)
Max Flow (j @350 Bar)
520 l/min
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
13 bar
Nominal Size
NG25
Pilot Oil Return
Internal (ET)
Pilot Oil Supply
Internal (ET)
Pilot Valve Type
High-Power (6E)
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve
D3 (45 bar)
Spool Symbol
J
Throttle Insert
Ø1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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