Bosch Rexroth | 4WEH10D4XOF6EW110N9ETDK25L
4WEH10D4X/OF6EW110N9ETDK25L
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The 4WEH10D4X/OF6EW110N9ETDK25L directional spool valve is produced by Bosch Rexroth in the WEH Directional Spool Valves series. It directs pressure flow to selected actuator ports in hydraulic automation. Electro-hydraulic actuation lets a small pilot stage shift the main NG 10 spool with low electrical effort. A maximum flow rate of 160 l/min allows the valve to serve medium-capacity circuits, while a maximum operating pressure of 280 bar at ports P, A, and B suits high-pressure systems. The pilot stage is a 4WE6 valve, so spare parts and coils match the common size 6 platform. Internal pilot oil supply (ET) feeds the pilot channels from the system line, and internal pilot oil return (T) routes the pilot discharge back to tank without extra lines. Together these features simplify installation and reduce external plumbing.
For safe pilot operation the unit tolerates up to 250 bar pilot pressure, and the internal return port T withstands 160 bar without damage. Subplate mounting anchors the body to a manifold, and the interface follows ISO 4401, using the specific porting pattern ISO 4401-05-05-0-05 to match NG 10 circuit plates. Cleanliness class ISO 4406 (c) 20/18/15 specifies the maximum particle count that must be maintained by system filtration to preserve sealing surfaces. Mean time to dangerous failure is rated at 100 years, supporting long service in safety-relevant machinery. These parameters define operating limits, connection geometry, and required fluid quality so the valve can reliably shift flow directions under demanding industrial duty cycles.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 (c) 20/18/15
Max Flow
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T (internal Return, Ac)
160 bar
Mounting Interface Standard
ISO 4401
Mounting Type
Subplate
Mttfd
100 years
Nominal Size
NG 10
Pilot Control Valve
4WE6
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-05-05-0-05
1620 Old Apex Road
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