Bosch Rexroth | H-4WEH25C6X6EW110N9S2K4V
H-4WEH25C6X/6EW110N9S2K4/V
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The H-4WEH25C6X/6EW110N9S2K4/V valve is produced by Bosch Rexroth as part of the WEH Directional Spool Valves series. It employs electro-hydraulic actuation so a pilot stage drives the spool for low switching force in high-pressure circuits. The nominal size NG25 defines the flow path dimensions, while the ISO 4401-10-09-0-05 mounting pattern allows direct installation on standardized subplates. Work ports P, A, and B can be pressurized up to 350 bar, letting the valve control cylinders or motors in heavy-duty systems. The pilot stage tolerates up to 250 bar, and a minimum pilot pressure of 13 bar is required on spring-centered two-position versions to move the spool fully. External pilot oil on port X and external drain on port Y isolate the control oil from the main flow for stable response.
A pilot flow of 35 l/min supports fast switching times, especially when viscosity stays within 2.8 to 500 mm²/s. FKM seals are fitted; they permit fluid temperatures from ‑15 °C to +80 °C and resist common hydraulic media. The valve body weighs 17.6 kg with one solenoid fitted, which affects manifold load calculations during assembly. Electrical connection is provided through the DIN EN 175301-803 type K4 plug, offering a straightforward interface for the coil. A concealed manual override identified by code N9 lets maintenance staff shift the spool without energizing the solenoid. The valve requires fluid cleanliness at ISO 4406 class 20/18/15 to avoid wear or jamming. These characteristics combine to deliver reliable directional control in automated hydraulic machinery.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Temperature Range
-15 to +80 C (FKM)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (2-spool, Spring End)
13 bar
Mounting Interface
ISO 4401-10-09-0-05
Nominal Size
NG25
Pilot Flow For Fast Switching
35 l/min
Pilot Oil Configuration
X External, Y External
Seal Material
FKM (V)
Viscosity Range
2.8 to 500 mm2/s
Weight (one Solenoid)
17.6 kg
1620 Old Apex Road
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