Bosch Rexroth | 4WEH16W7X6EW110NETDALB08
4WEH16W7X/6EW110NETDAL/B08
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The 4WEH16W7X/6EW110NETDAL/B08 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs hydraulic oil in automated power units. With a nominal size of NG16, it accommodates a maximum flow of 300 l/min through its W-profile spool, supporting medium-capacity cylinders and motors. The spool provides three distinct positions so machinery can extend, retract, or hold loads mid-stroke. Internal pilot oil supply from port P eliminates external pilot lines, and the return path is internal to port T to streamline manifold layouts. A manual override lets technicians shift the element during commissioning or power loss. The assembly withstands 280 bar on pressure and work ports while needing at least 14 bar pilot pressure to recentralize the spring-centered spool under all conditions.
Installation uses the ISO 4401-07-07-0-05 interface, and each M10 mounting screw must be tightened to 58 Nm for secure seating against the sub-plate. The pilot circuit can operate up to 250 bar, and the valve tolerates the same 250 bar on the tank port so backpressure does not impair function. A throttle insert with a 0.8 mm orifice may be fitted to smooth flow transitions, and the centered spool leaves a 6 mm² cross-section between A-T and B-T to keep leakage low at rest. Functional reliability is quantified by an MTTFd of 100 years, reflecting the long service life expected for this type of WEH valve.
Technical Specifications
Manual Override
Yes
Max Flow (symbol W, Ng16)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Tank Port Pressure (t)
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Screw Torque (m10)
58 Nm
Mttfd (type Weh)
100 years
Nominal Size
NG16
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (P)
Spool Positions
3
Spool Symbol
W
Throttle Insert
Ø 0.8 mm
Zero-position A–t/b–t (w)
6 mm2
1620 Old Apex Road
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