Bosch Rexroth | 4WEH10EA4X6EW110N9ETS2K4B10
4WEH10EA4X/6EW110N9ETS2K4/B10
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The 4WEH10EA4X/6EW110N9ETS2K4/B10 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and directs pressure and return flow in hydraulic automation circuits. The unit is built to the NG10 nominal size, allowing it to fit manifolds intended for medium-capacity lines, and its port layout follows ISO 4401-05-05-0-05 so mounting surfaces remain interchangeable across standardized subplates. A maximum operating pressure of 280 bar on ports P, A, and B lets the valve handle high-pressure systems without derating, while a peak flow rate of 160 l/min supports rapid actuator movement. Pilot oil is supplied internally, and the return path is also internal, eliminating external pilot hoses. Spring-centered operation begins once pilot pressure reaches 12 bar and can be controlled up to 250 bar, providing a wide control window for various pump setups.
For precise timing, a 1.0 mm throttle insert regulates pilot oil to influence spool travel, and discharge control is available for switching time adjustment. A concealed manual override permits local actuation during commissioning while protecting the mechanism from accidental use, and electrical termination follows DIN EN 175301-803 for quick wiring with standard connectors. Fastening screws should be tightened to 12.5 Nm to maintain seal integrity between the valve and subplate, and system oil must meet cleanliness class ISO 4406 20/18/15 to prevent spool sticking and wear. The housing carries a protective coating with a maximum thickness of 100 µm to resist corrosion in humid environments, and functional safety is supported by an MTTFd of 100 years for long service life in continuous duty.
Technical Specifications
Coating Thickness (max)
100 µm
Electrical Connection
DIN EN 175301-803
Fluid Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed
Max Flow
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
12 bar
Mttfd
100 years
Nominal Size
NG10
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-05-05-0-05
Screw Tightening Torque
12.5 Nm
Switching Time Adjustment
Discharge Control
Throttle Insert Diameter
1.0 mm
1620 Old Apex Road
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