Bosch Rexroth | H-4WEH25R6X6EG24N9ETK4B10D3V
H-4WEH25R6X/6EG24N9ETK4/B10D3V
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The H-4WEH25R6X/6EG24N9ETK4/B10D3V valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It diverts pressure-balanced flow in hydraulic automation circuits that need rapid switching. The unit is built for a nominal size of NG25 so the ports match standard subplates. It withstands operating pressures up to 350 bar while passing as much as 450 l/min without exceeding the performance limit. Pilot control uses code ET, meaning both the supply and return paths are internal; the return is routed through port T to keep external lines to a minimum. Interface dimensions follow the ISO 4401-08-08-0-05 porting pattern to simplify manifold design. A DIN EN 175301-803 K4 connector supplies coil power, and system oil entering the valve must meet cleanliness class 20/18/15 to protect the precision spool.
Subplate mounting secures the valve to the manifold and positions the flow paths accurately. Six M12 × 60 screws are specified for installation, each tightened to 100 Nm to maintain the seal under load. The assembly can receive a maximum coating thickness of 100 µm so the surfaces resist corrosion without obstructing fit. A calculated mean time to dangerous failure of 100 years supports high system reliability targets. An integrated pressure reducing stage is factory-set to 45 bar, allowing the control pilot to remain stable when upstream pressure fluctuates. A throttle insert with a 1.0 mm orifice is included to limit pilot flow during fast shifts and damp pressure peaks. These features complete the mechanical envelope of the model.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Electrical Connection
DIN EN 175301-803 K4
Max Flow (performance Limit)
450 l/min
Max Operating Pressure (p, A, B)
350 bar
Mounting Screw Thread
M12 x 60 (6 pcs)
Mounting Screw Torque
100 Nm
Mounting Type
Subplate Mounting
Mttfd
100 years
Nominal Size
NG25
Pilot Oil Flow Code
ET (internal supply and return)
Pilot Oil Return
Internal Via Port T
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve Setting
45 bar (D3)
Surface Coating Thickness (max)
100 µm
Throttle Insert Size
Ø 1.0 mm (B10)
1620 Old Apex Road
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