Bosch Rexroth | 4WEH16W7X6EW110N9ETDK25LB10
4WEH16W7X/6EW110N9ETDK25L/B10
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The 4WEH16W7X/6EW110N9ETDK25L/B10 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and serves to shift hydraulic flow paths under automated control. Its electro-hydraulic actuation lets an electric signal trigger hydraulic pilot force, reducing coil power while still moving the NG16 spool for medium flow circuits. The ISO 4401-07-07-0-05 mounting pattern fits standard subplates so installation into manifolds is straightforward. A 4WE6 6E pilot valve drives the main stage, providing fast response without external logic elements. Internal pilot-oil supply marked ET feeds the pilot passages from the pressure port, and internal return marked T channels exhaust back to the tank, eliminating separate pilot lines. A concealed N9 manual override is present to allow emergency switching without exposing a lever. Finally, a Ø1.0 mm B10 throttle insert is fitted to meter pilot flow and damp pressure shocks.
This valve withstands pilot pressures up to 250 bar so it can be paired with high-pressure systems without additional regulators. It operates in ambient temperatures up to 50 °C, while the hydraulic fluid may range from −20 °C to 80 °C so seasonal starts and heated oil service remain within limits. The permitted viscosity window is 2.8 mm²/s to 500 mm²/s, allowing use with most mineral hydraulic oils from low-temperature grades to heavy-duty fluids. To protect the precision spool, the cleanliness requirement is ISO 4406 20/18/15, meaning contamination levels must stay below that code. Electrical actuation is wired through a DIN EN 175301-803 connector, giving a common industrial interface for coils and position sensors.
Technical Specifications
Actuation Type
Electro-Hydraulic
Ambient Temp Max
+50 C
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803
Hydraulic Fluid Temp Max
+80 C
Hydraulic Fluid Temp Min
-20 C
Manual Override
Concealed (N9)
Maximum Pilot Pressure
250 bar
Mounting Pattern
ISO 4401-07-07-0-05
Nominal Size
NG16
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Pilot Valve Type
4WE6 6E
Throttle Insert
Ø1.0 mm (B10)
Viscosity Max
500 mm2/s
Viscosity Min
2.8 mm2/s
1620 Old Apex Road
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