Bosch Rexroth | H-4WEH25X80-6X6EG24N9ETK411B12D3
H-4WEH25X80-6X/6EG24N9ETK4/11B12D3
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The H-4WEH25X80-6X/6EG24N9ETK4/11B12D3 valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for precise control of hydraulic actuators in automated machinery. It is built in size NG25 to match manifolds following porting pattern ISO 4401-08-08-0-05, letting designers use standardized mounting surfaces. A solenoid coil rated for 24 V DC shifts the spool when energized, while a concealed manual override marked N9 allows local actuation during commissioning or power loss. The internal pilot oil supply designated X and the internal pilot oil return labeled T simplify plumbing because no external pilot lines are required. Maximum operating pressure at ports P, A, and B is 350 bar, and the pilot stage tolerates up to 250 bar so the valve can function in high-pressure circuits. Internal pilot return Y must stay below 210 bar to protect the control section. A throttle insert with a 1.2 mm orifice code B12 restricts pilot flow and smooths spool movement.
Installation uses four M12 × 60 screws in compliance with ISO 4762 grade 10.9, and each screw must be tightened to 100 Nm to secure the body against the subplate. Stroke setting 11 on valve side A limits spool travel for accurate metering. An integrated pressure-reducing valve labeled D3 caps pilot pressure at 45 bar to protect the solenoid. The permitted fluid cleanliness is ISO 4406 class 20/18/15, so filtration must keep contamination within that range to avoid wear. Electrical connection is made with a DIN EN 175301-803 K4 plug that allows quick disconnection for maintenance. These assembly guidelines and interface details streamline valve replacement in production lines.
Technical Specifications
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
ISO 4406 (c) 20/18/15
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Mounting Screws
M12 × 60 (ISO 4762, 10.9)
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (X)
Pilot Return Y Internal Max Pressure
210 bar
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve D3
45 bar
Screw Tightening Torque
100 Nm
Size
NG25
Stroke Setting
Valve Side A (11)
Throttle Insert
Ø1.2 mm (B12)
1620 Old Apex Road
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