Bosch Rexroth | 4WEH22C7X6EG24N9ETK4B10
4WEH22C7X/6EG24N9ETK4/B10
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The 4WEH22C7X/6EG24N9ETK4/B10 is produced by Bosch Rexroth for the WEH Directional Spool Valves series and directs hydraulic flow in automated machinery through electro-hydraulic actuation. Its NG25 size defines the flow capacity and matches manifolds built for that cavity. The porting pattern follows ISO 4401-08-08-0-05 so the valve fits standard subplates without adaptation. A 24 V DC coil energizes the pilot stage, allowing low-voltage electrical control. The electrical connection uses a DIN EN 175301-803 plug, which provides quick coil replacement and clear polarity coding. Spool symbol C establishes the flow paths for each operating state, while two switching positions permit basic directional change. Internal pilot oil supply feeds the pilot stage from the pressure port, and internal pilot oil return sends pilot flow back into the body so no external lines are needed.
The main ports p, a, and b withstand up to 280 bar of operating pressure, enabling the valve to run in high-pressure circuits. Pilot return port y is limited to 210 bar (DC), protecting the pilot stage from excessive backpressure. A Ø 1.0 mm throttle insert labeled B10 restricts pilot flow to moderate shifting speed and reduce shock. Installation uses six M12 × 60 screws per ISO 4762, and each screw requires 100 Nm of tightening torque to secure the housing against the subplate. NBR seals contain mineral hydraulic oil and maintain leakage control across the full pressure range. The mean time to dangerous failure (Mttfd) is 100 years, supporting long service intervals in safety-related systems.
Technical Specifications
Actuation
Electro-Hydraulic
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Return Pressure (y)
210 bar (DC)
Mounting Screws
6x M12 x 60 (ISO 4762)
Mttfd
100 Years
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
NBR
Size
NG25
Spool Symbol
C
Switching Positions
2
Throttle Insert
Ø 1.0 mm (B10)
Tightening Torque (screws)
100 Nm
1620 Old Apex Road
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