Bosch Rexroth | 4WEH16D7XOF6EW110N9ESDK25LV
4WEH16D7X/OF6EW110N9ESDK25L/V
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The 4WEH16D7X/OF6EW110N9ESDK25L/V valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth to direct hydraulic flow in automated systems. Its NG16 size suits mid-capacity lines, and the D spool symbol sets the internal porting needed for conventional actuator control. A four-way configuration routes pressure to two work ports and provides dedicated return passages. Maximum flow reaches 300 l/min, enabling rapid cylinder or motor movement, while ports P, A, and B withstand up to 280 bar to support high-pressure circuits. The permitted viscosity band of 2.8–500 mm²/s accommodates a broad range of hydraulic oils, and fluid temperatures from −15 to +80 °C with FKM seals cover both cold starts and elevated running temperatures. Ambient conditions between −15 and +50 °C are acceptable, so the valve operates reliably in standard machine halls.
An oil cleanliness level of ISO 4406 20/18/15 is specified to limit wear on mating surfaces. The valve draws pilot supply internally on port X and vents externally through port Y, matching installations that provide a separate tank return. A minimum pilot pressure of 14 bar is required for consistent shifting, and the pilot circuit tolerates up to 250 bar for safety under surge conditions. Port T may see back-pressures up to 250 bar without affecting function, and port Y remains safe up to 160 bar when used as an external drain. Switching time can be trimmed using the supply-control adjustment identified by code S, allowing the user to balance response speed against shock. A concealed manual override designated N9 lets maintenance personnel reposition the spool during setup or power loss without altering external dimensions.
Technical Specifications
Ambient Temp Range
−15 to +50 °C (FKM)
Cleanliness Class
ISO 4406(c) 20/18/15
Fluid Temp Range
−15 to +80 °C (FKM)
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Pressure
250 bar
Max Port T Pressure
250 bar
Max Port Y Pressure (external, Ac)
160 bar
Min Pilot Pressure
14 bar
Pilot Supply/return
X Internal, Y External (E)
Size (ng)
16
Spool Symbol
D
Switching Time Adjustment
Supply Control (S)
Viscosity Range
2.8 to 500 mm²/s
Way Configuration
4-Way
1620 Old Apex Road
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