Bosch Rexroth | 4WEH16D7X6EW110N9TDALB10
4WEH16D7X/6EW110N9TDAL/B10
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The 4WEH16D7X/6EW110N9TDAL/B10 directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is intended for hydraulic automation circuits that need controlled flow direction. It is built in nominal size 16 and mounts on the ISO 4401-07-07-0-05 interface. The assembly accepts hydraulic fluids with a viscosity between 2.8 and 500 mm²/s and requires oil cleanliness of ISO 4406 (c) 20/18/15. Operating pressure at ports P, A, and B is rated to 280 bar, while the tank port tolerates up to 250 bar. Pilot oil is supplied externally through port X, and return oil flows internally through port T, which simplifies manifold plumbing.
The valve permits pilot pressures up to 250 bar and allows internal pilot return (Ac) up to 160 bar. Stroke adjustment is 1.5 mm per turn, providing precise limitation of spool travel. A throttle insert marked B10 meters flow in the pilot supply line P, and the spring-centered three-spool stage displaces 5.72 cm³ of pilot oil during actuation. Installation uses M10 screws tightened to 58 Nm with a tolerance of ±10 %, anchoring the body securely to the subplate. Port Y stays closed on this model to prevent external pilot exhaust. The mean time to dangerous failure is 100 years, supporting long service intervals in industrial machinery.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Max Operating Pressure (p, A, B)
280 bar
Max Operating Pressure (t)
250 bar
Max Pilot Pressure
250 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Screw Torque (m10)
58 Nm ±10%
Mttfd
100 years
Nominal Size
16
Pilot Oil Return
Internal via T
Pilot Oil Supply
External via X
Pilot Return Max Pressure (internal, Ac)
160 bar
Pilot Volume (3-spool, Spring-centered)
5.72 cm3
Port Y
Closed
Stroke Adjustment Per Turn
1.5 mm
Throttle Insert
B10 (pilot P)
Viscosity Range
2.8 to 500 mm2/s
1620 Old Apex Road
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