Bosch Rexroth | 4WEH16H7X6EW110N9S2DK25L
4WEH16H7X/6EW110N9S2DK25L
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The 4WEH16H7X/6EW110N9S2DK25L directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs flow in hydraulic automation systems. It is a 4/2-way valve built to the NG16 size and shifts the D-coded spool through electro-hydraulic actuation. Working ports follow the ISO 4401-07-07-0-05 pattern, while pilot oil is supplied externally through port X and returned externally via port Y. The assembly withstands operating pressures up to 350 bar on ports P, A, and B and permits flows up to 300 l/min without exceeding design limits.
Pilot control functions between 14 bar and a maximum of 250 bar, and a hydraulic return resets the spool after each cycle. A concealed N9 manual override permits local operation when electrical power is absent, and the S2 discharge control allows adjustment of switching time to match circuit requirements. Fluid viscosity may range from 2.8 to 500 mm²/s, and hydraulic oil cleanliness must reach ISO 4406 class 20/18/15 to protect internal lands. These features complete the specification profile of the valve.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Control Spool Return
Hydraulic
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
350 bar
Maximum Flow
300 l/min
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure
14 bar
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
Spool Symbol
D
Switching Time Adjustment
Discharge Control (S2)
Viscosity Range
2.8 to 500 mm2/s
Way Configuration
4/2-Way
1620 Old Apex Road
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