Bosch Rexroth | 4WEH16D7X6EW110N9SDK23L
4WEH16D7X/6EW110N9SDK23L
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The 4WEH16D7X/6EW110N9SDK23L directional spool valve is part of the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation tasks that require reliable flow switching. Electro-hydraulic actuation moves the spool with solenoid-controlled pilot oil, enabling rapid transitions under load. The NG16 valve size supports a flow of 300 l/min through the D-coded spool while withstanding a maximum operating pressure of 350 bar. An internal pilot oil supply identified as Type E eliminates separate feed lines, and the body mounts to a subplate that follows the ISO 4401-07-07-0-05 porting pattern. Four M10 × 60 screws anchor the housing, matching the valve footprint for secure installation on the manifold.
The pilot stage tolerates pressures up to 250 bar and starts shifting once 14 bar is available on the external X connection; drained pilot oil returns through Port Y to keep tank flow isolated from the work lines. A protective coating limited to 100 µm guards the surface against corrosion without affecting subplate alignment. The mean time to dangerous failure is rated at 100 years, which supports long service intervals in safety calculations. Correct assembly requires tightening the mounting screws to 58 Nm to maintain gasket compression and prevent leakage. These characteristics define the valve’s operational envelope and allow dependable control in automated hydraulic stations.
Technical Specifications
Actuation Type
Electro-Hydraulic
Coating Thickness (max)
100 µm
Maximum Flow (ng16 D Spool)
300 l/min
Maximum Operating Pressure
350 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (x External)
14 bar
Mounting Screws
4x M10 x 60
Mounting Type
Subplate
Mttfd
100 years
Pilot Oil Return
External (Port Y)
Pilot Oil Supply
Internal (Type E)
Porting Pattern
ISO 4401-07-07-0-05
Screw Tightening Torque
58 Nm
Valve Size
NG16
1620 Old Apex Road
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