Bosch Rexroth | 4WEH16HD7XOF6EW110N9ETK4B10
4WEH16HD7X/OF6EW110N9ETK4/B10
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The 4WEH16HD7X/OF6EW110N9ETK4/B10 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth. It is deployed to shift hydraulic flow paths in automated circuits. The valve is a pilot-operated directional spool design, allowing low actuation effort for high-flow channels. It is built in NG16 size so it matches subplate manifolds of that cavity. Two hydraulic end spool positions provide on-off control between connected ports. Internal pilot supply on port P feeds the pilot stage, while internal pilot return to port T brings the pilot oil back to tank without external lines. The interface follows the ISO 4401-08-08-0-05 porting pattern to ensure interchangeability with standard bases. Electrical actuation uses a DIN EN 175301-803 K4 connector for quick solenoid wiring. Subplate mounting simplifies service exchange without disturbing pipework.
Maximum service capacity reaches 300 l/min, enabling the valve to handle large actuator flows. Work ports can be pressurized up to 350 bar during operation, while the pilot stage tolerates up to 250 bar to maintain reliable shifting. The pilot circuit still functions when line pressure drops to 14 bar, defining the minimum pilot pressure at the hydraulic end. A Ø1.0 mm throttle insert is fitted to damp transient flow surges through the pilot lines. Cleanliness requirements are ISO 4406 20/18/15 so upstream filtration must limit solid contamination accordingly. Four M10×60 grade 10.9 screws tightened to 58 Nm ±10 % secure the housing to the mounting surface. These mechanical and hydraulic limits together define safe use within automated hydraulic machines.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow
300 l/min
Max Operating Pressure (p/a/b)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (hyd. End)
14 bar
Mounting Screws
4× M10×60 (10.9), 58 Nm ±10%
Mounting Type
Subplate
Pilot Return
Internal (T)
Pilot Supply
Internal (P)
Porting Pattern
ISO 4401-08-08-0-05
Size
NG16
Spool Positions
2 (Hydraulic End Position)
Throttle Insert
Ø1.0 mm
Valve Type
Pilot-Operated Directional Spool
1620 Old Apex Road
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