Bosch Rexroth | 4WEH10HD4XOF6EW110N9ETS2K4B10
4WEH10HD4X/OF6EW110N9ETS2K4/B10
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The 4WEH10HD4X/OF6EW110N9ETS2K4/B10 directional valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is intended for hydraulic automation where remote, rapid flow control is required. Electro-hydraulic actuation allows a small pilot stage to shift the NG10 main spool, while the 4-way flow path supports bidirectional actuator movement. A D-coded spool offers the specified overlap profile, and two discrete positions provide simple extend-retract logic. Hydraulic pressure returns the spool to its rest state once the solenoid is de-energized. The pilot oil circuit is supplied and drained internally, which removes the need for external pilot lines. A concealed manual override permits on-site intervention without electrical power. The valve mounts on subplates that follow ISO 4401-05-05-0-05, and a 1.0 mm throttle insert in the pilot channel works with discharge-based switching time adjustment to moderate shift speed.
The housing tolerates 350 bar at the service ports, allowing the unit to operate on high-pressure systems. Pilot components are limited to 250 bar and continue to function with as little as 7 bar when the spool reaches its H end position. Electrical termination uses a DIN EN 175301-803 type K4 plug so wiring can be swapped quickly during maintenance. System fluid must remain at ISO 4406 cleanliness class 20/18/15 to protect the fine spool edges and ensure consistent response. Discharge control lets technicians tailor switching time by altering the pilot orifice, and the factory restrictor offers a balanced starting point. These attributes allow the valve to deliver predictable service in presses, test stands, and machine tools while keeping installation compact and upkeep straightforward.
Technical Specifications
Actuation
Electro-Hydraulic
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
20/18/15 (ISO 4406)
Manual Override
Concealed (N9)
Max Operating Pressure (p/a/b)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (2-spool, H End Pos)
7 bar
Pilot Oil Supply/return
Internal (ET)
Porting Pattern
ISO 4401-05-05-0-05
Size
NG10
Spool Positions
2
Spool Symbol
D
Switching Time Adjustment
Discharge (S2)
Throttle Insert Orifice
1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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