Bosch Rexroth | 4WEH16HC7X6EW110N9ESK4B10
4WEH16HC7X/6EW110N9ESK4/B10
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The 4WEH16HC7X/6EW110N9ESK4/B10 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated circuits that need remote piloting and rapid cycling. The component is built in nominal size NG16 so it matches medium-frame manifolds, and its porting pattern follows ISO 4401-07-07-0-05 to align with standardized sub-plates. An internal pilot oil supply identified by port P feeds the pilot stage, while the return is external on port Y to keep control pressure stable. The valve passes up to 300 l/min, and the main ports can withstand 280 bar, enabling high-volume actuation at elevated pressure. A throttle insert coded B10 in the pilot valve inlet moderates flow to the control spool, and the S switching time adjustment lets technicians fine-tune shift speed for machine requirements. A concealed manual override is provided so the spool can be shifted locally during commissioning or power loss.
The valve tolerates pilot pressure up to 250 bar, while the two-position hydraulic end requires a minimum of 14 bar to move the spool. Maintaining pilot circuits inside that window prevents erratic shifts. Operating fluid must meet cleanliness class ISO 4406 20/18/15 so that contaminants do not jam the precision lands. Continuous duty is permitted with hydraulic oil temperatures up to 80 °C, and the surrounding ambient may rise to 50 °C without derating. Thermal limits such as these preserve fluid viscosity and coil life. Mechanically, the housing is fastened to the manifold with four M10 × 60 screws, each tightened to 58 Nm to hold the gasket against full system pressure. These mounting figures, together with the pressure and temperature boundaries outlined above, complete the installation framework required for dependable service.
Technical Specifications
Ambient Temperature Max
+50 C
Cleanliness Class
ISO 4406 20/18/15
Hydraulic Fluid Temp Max
+80 C
Manual Override
Concealed
Max Flow
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (2-pos Hyd End)
14 bar
Mounting Screws
M10 x 60 (4 pcs)
Nominal Size
NG16
Pilot Oil Return
External (Y)
Pilot Oil Supply
Internal (P)
Porting Pattern
ISO 4401-07-07-0-05
Screw Tightening Torque
58 Nm
Switching Time Adjustment
S
Throttle Insert
B10 (Pilot Valve P)
1620 Old Apex Road
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