Bosch Rexroth | 4WEH10D4XOF6EW110N9S2DK25L
4WEH10D4X/OF6EW110N9S2DK25L
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The 4WEH10D4X/OF6EW110N9S2DK25L valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and is used to direct hydraulic flow in automated machinery. Electro-hydraulic actuation lets an electrical signal drive the spool through a pilot stage instead of a direct mechanical link. The component is built in nominal size NG10 so it installs on common size-10 manifold plates. A 4-way configuration provides pressure, tank, and two work ports for bidirectional actuator control. Two spool positions give the machine controller a simple on-off choice between flow paths. The pilot solenoid operates at 110 V AC, 50 or 60 Hz, enabling connection to standard control transformers. Internal pilot oil supply reduces external piping, while external pilot oil return discharges pilot flow without back-pressure, and the assembly accepts up to 160 l/min through the main ports following porting pattern ISO 4401-05-05-0-05.
The main ports P, A, and B withstand operating pressures to 280 bar, and port T is rated for the same limit so the unit can handle high system loads. Pilot circuitry endures up to 250 bar yet still shifts the spool when pressure falls to 10 bar, maintaining functionality during low-pressure startup. Required oil cleanliness is ISO 4406 class 20/18/15 to avoid wear in the precision spool lands. A concealed manual override permits local actuation without removing protective covers. Safety calculations are assisted by a mean time to dangerous failure of 100 years, indicating long statistical service life. These pressure, cleanliness, and reliability characteristics allow the valve to support continuous duty in presses and other machinery where sudden directional changes must occur under load.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed
Max Flow
160 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Operating Pressure (t Port)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure
10 bar
Mttfd
100 years
Nominal Size
NG10
Pilot Oil Return
External
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-05-05-0-05
Rated Voltage
110 V AC (50/60 Hz)
Spool Positions
2
Way Configuration
4-Way
1620 Old Apex Road
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