Bosch Rexroth | 4WEH10D4XOF6EW110N9ETDA
4WEH10D4X/OF6EW110N9ETDA
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The 4WEH10D4X/OF6EW110N9ETDA directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and routes pressurized oil to actuators in hydraulic automation. It follows the ISO 4401-05-05-0-05 mounting pattern so it mates with NG10 subplates. Ports P, A, and B withstand operating pressures up to 280 bar, while symbol D allows a maximum flow of 160 l/min for medium-capacity circuits. The unit works with oil viscosities between 2.8 and 500 mm²/s, letting designers use a broad range of fluids. Ambient temperatures may range from –20 °C to +50 °C, and permitted fluid temperatures extend from –20 °C to +80 °C, ensuring function in cold starts and warm running. System cleanliness must be held to class 20/18/15 under ISO 4406 to minimize wear and prevent spool sticking.
Switching performance depends on controlled pilot conditions: the pilot stage accepts up to 250 bar and needs 35 l/min pilot flow for the shortest actuation time. A two-spool configuration consumes 4.08 cm³ pilot volume per shift, aiding accumulator sizing. The internal return through port T can handle 160 bar back-pressure, so the valve suits circuits with elevated tank lines. An MTTFd of 100 years supports long service life in safety-related applications. Together, these limits let the 4WEH10D4X/OF6EW110N9ETDA execute reliable, rapid direction changes within its specified hydraulic envelope.
Technical Specifications
Ambient Temp Max (nbr)
+50 °C
Ambient Temp Min (nbr)
-20 °C
Cleanliness Class
20/18/15 (ISO 4406)
Hydraulic Fluid Temp Max (nbr)
+80 °C
Hydraulic Fluid Temp Min (nbr)
-20 °C
Max Flow (symbol D, Ng10)
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Mounting Pattern
ISO 4401-05-05-0-05
Mttfd (type Weh)
100 years
Pilot Flow For Shortest Switching Time
35 l/min
Pilot Volume For Switching (2-spool)
4.08 cm3
Port T Max Pressure (internal Return, Ac)
160 bar
Viscosity Max
500 mm2/s
Viscosity Min
2.8 mm2/s
1620 Old Apex Road
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