Bosch Rexroth | H-4WEH25E6X6EW110N9ETK4B10D3V
H-4WEH25E6X/6EW110N9ETK4/B10D3V
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The H-4WEH25E6X/6EW110N9ETK4/B10D3V valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series to route fluid in automated hydraulic systems. It employs a spring-centered three-position spool that returns to neutral when the pilot signal is off. Main flow paths P to A or B tolerate 350 bar, and with symbol E at that pressure the valve can pass 650 l/min, suiting high-volume circuits. The pilot stage accepts control pressure from 13 bar up to a limit of 250 bar, giving flexibility in system design. Pilot oil is fed internally from port P, and the exhausted pilot oil returns internally through port T to reduce external plumbing. A B10 throttle insert in the pilot valve port P restricts pilot flow for smoother spool movement.
The unit follows porting pattern ISO 4401-10-09-0-05 so it fits standard subplates. Six M12 × 60 screws per ISO 4762 secure the body, and these fasteners require 100 N·m ±10% torque to hold the seals. An integrated D3 pressure-reducing valve prevents pilot circuit over-pressure, while FKM seals tolerate aggressive hydraulic fluids. Port T is rated for 250 bar, enabling operation with elevated tank line back-pressure. The assembly with two solenoids and springs weighs 19.0 kg, which influences manifold support requirements. System oil cleanliness must meet ISO 4406 class 20/18/15 to avoid spool sticking and wear.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Max Flow (symbol E @ 350 Bar)
650 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Operating Pressure (port T)
250 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (3-pos Spring-centered)
13 bar
Mounting Screw Torque
100 Nm ±10%
Mounting Screws
6x M12 x 60 (ISO 4762)
Pilot Oil Return
Internal Via T
Pilot Oil Supply
Internal From P
Porting Pattern
ISO 4401-10-09-0-05
Pressure Reducing Valve
D3 Installed
Seal Material
FKM
Spool Centering
Spring-Centered (3-Position)
Throttle Insert
B10 In Pilot Valve Port P
Weight (two Solenoids, Spring-centered)
19.0 kg
1620 Old Apex Road
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