Bosch Rexroth | H-4WEH25J6X6EW110N9EDALB10D3
H-4WEH25J6X/6EW110N9EDAL/B10D3
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The H-4WEH25J6X/6EW110N9EDAL/B10D3 directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. Electro-hydraulic actuation moves the NG25 spool with pilot oil so remote solenoid commands can shift flow paths in automated hydraulic machinery. Its 4/3-way configuration offers a pressure, tank, and two work ports that return to center when the control signal is removed. The unit installs on a subplate, and the ISO 4401-08-08-0-05 porting pattern matches common manifold layouts. Pilot oil is drawn internally, while the external Y port sends pilot return oil to tank, keeping back-pressure low in the control stage. A concealed manual override lets technicians move the spool by hand during setup or power loss without exposing moving parts.
A 1.0 mm throttle insert in the pilot gallery tempers flow for smooth shifting, and the spring-centered design requires at least 13 bar pilot pressure to actuate. System oil must meet ISO 4406 20/18/15 cleanliness to protect the precision lands. When J-style flow paths are selected the valve passes up to 520 l/min at 350 bar, while the main ports tolerate operating pressures to the same 350 bar. The pilot supply withstands 250 bar, and the external return line is rated for 160 bar to suit circuits with back-pressure. An internal pressure-reducing element caps secondary pressure at 45 bar to shield the control components. These limits allow the valve to direct high-energy flows reliably in press machines, plastic molding equipment, and other hydraulic automation where rapid directional changes are required.
Technical Specifications
Actuation
Electro-Hydraulic
Fluid Cleanliness
ISO 4406 20/18/15
Manual Override
Concealed
Max Flow (symbol J, 350 Bar)
520 l/min
Max Operating Pressure
350 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y Internal, Ac)
160 bar
Min Pilot Pressure (spring-centered)
13 bar
Mounting Type
Subplate
Pilot Oil Return
External (Y)
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve Secondary Pressure
45 bar
Throttle Insert Orifice
1.0 mm
Valve Function
4/3-Way
Valve Size
NG25 (W.H 25)
1620 Old Apex Road
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