Bosch Rexroth | 4WEH16C7XOF6EW110N9K4
4WEH16C7X/OF6EW110N9K4
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The 4WEH16C7X/OF6EW110N9K4 valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It serves as a pilot-operated directional element that guides flow to hydraulic actuators in automated machinery. The design is built in size NG16 so it mates with standard subplates of that footprint. With symbol C it passes up to 300 l/min, supporting high-flow circuits, while ports P, A, and B tolerate operating pressures of 280 bar. Port T withstands 250 bar, allowing elevated return pressures without damaging seals. Pilot oil is fed internally through channel X and discharged externally through port Y to isolate back-pressure from the control stage. The pilot section needs a minimum of 4.5 bar to shift and accepts up to 250 bar, and the hydraulic fluid may reach 80 °C during continuous duty.
The unit remains reliable at ambient temperatures up to 50 °C and requires oil cleanliness of ISO 4406 20/18/15 to maintain precise spool motion. Electrical actuation is provided through a DIN EN 175301-803 type K4 connector that offers quick coil replacement. A concealed manual override identified as N9 allows manual shifting when power is absent. Correct installation demands tightening the mounting screws to 58 Nm, and the subplate interface follows ISO 4401-07-07-0-05 so the valve drops onto common manifolds. The mean time to dangerous failure is rated at 100 years, supporting safety-related circuits over long life cycles.
Technical Specifications
Ambient Temperature Max
50 °C
Cleanliness Class
ISO 4406 20/18/15
Electrical Connector
DIN EN 175301-803 (K4)
Hydraulic Fluid Temp Max
80 °C
Manual Override
Concealed (N9)
Max Flow (symbol C)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (x Internal)
4.5 bar
Mounting Screw Torque
58 Nm
Mttfd
100 years
Pilot Oil Return
External (Y)
Pilot Oil Supply
Internal (X)
Port T Max Pressure
250 bar
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
1620 Old Apex Road
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