Bosch Rexroth | 4WEH16J7X6EW110N9ES2K4B10
4WEH16J7X/6EW110N9ES2K4/B10
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The 4WEH16J7X/6EW110N9ES2K4/B10 valve is part of the WEH Directional Spool Valves series produced by Bosch Rexroth for hydraulic automation. It is built in size NG16 to match manifolds where nominal flow passages require that port dimension. Spool type J establishes the internal flow paths suited for standard cylinder circuits, while the three spool positions allow a neutral center plus two working states for bidirectional actuation. A spring returns the main spool to center so that flow is blocked when control pressure is removed. A concealed manual override labeled N9 lets service staff shift the spool mechanically during commissioning or power loss. Electrical actuation is accomplished through a DIN EN 175301-803 K4 connector that offers a sealed and keyed interface for the solenoid wires. Discharge control S2 provides an adjustable damping feature that trims switching time to prevent pressure shocks. Internal pilot oil supply taps system pressure without external lines, simplifying installation.
External pilot oil return routes pilot flow back to tank separately, which prevents back pressure from influencing the spool pilot stage. The valve withstands 280 bar on ports P, A, and B so it can run in high-pressure circuits, while the pilot return port y is limited to 160 bar to protect the control stage. Its subplate interface follows the ISO 4401-07-07-0-05 pattern, ensuring interchangeability with common NG16 manifolds. A 1.0 mm throttle insert coded B10 can be fitted to moderate flow and further smooth switching. Fluid cleanliness must meet ISO 4406 20/18/15 so that the precision lands are not damaged by contamination. NBR seals contain standard mineral-oil hydraulic fluids and maintain leak tightness across the specified pressure range. Mounting screws should be tightened to 58 Nm, providing adequate clamping force without distorting the body.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Main Spool Return
Spring
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Return Pressure (y)
160 bar
Mounting Screw Torque (m10)
58 Nm
Pilot Oil Return
External
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-07-07-0-05
Seal Material
NBR
Spool Positions
3
Spool Type
J
Switching Time Adjustment
Discharge Control (S2)
Throttle Insert
Ø 1.0 mm (B10)
Valve Size
NG16
1620 Old Apex Road
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