Bosch Rexroth | H-4WEH16Y7X6EW110N9K4V
H-4WEH16Y7X/6EW110N9K4/V
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The H-4WEH16Y7X/6EW110N9K4/V valve belongs to the WEH Directional Spool Valves series produced by Bosch Rexroth and is used to direct hydraulic flow in automated systems. With a valve size of NG16, it suits mid-capacity circuits, and its ISO 4401-07-07-0-05 porting pattern lets it mount on standard subplates. Pilot oil enters through external port X and returns through external port Y to separate the control circuit from the main tank line. Electrical actuation uses a K4 connector that follows DIN EN 175301-803 for straightforward solenoid wiring. The main ports handle operating pressures up to 350 bar, while the pilot stage is rated for 250 bar to maintain reliable shifting. A spring-centered two-spool version needs a minimum pilot pressure of 14 bar to move the spool and guarantee positive positioning.
The valve carries up to 300 l/min on symbol Y in NG16 applications, supporting rapid cylinder movement. It accepts hydraulic fluids with viscosities from 2.8 mm²/s to 500 mm²/s to cover a broad range of oil types and temperatures. A concealed N9 manual override lets technicians shift the spool during setup without exposing the control to accidental use. FKM seals contain the working fluid and withstand most common hydraulic media. Installation uses four M10 × 60 mounting bolts, and each bolt is tightened to 58 N·m to keep the gasket compressed against the subplate. System oil cleanliness must reach ISO 4406 class 20/18/15 so the spool lands stay free of abrasive contamination.
Technical Specifications
Electrical Connection
K4 (DIN EN 175301-803)
Hydraulic Cleanliness Class (iso 4406)
20/18/15
Manual Override
Concealed (N9)
Max Flow (symbol Y, Ng16)
300 l/min
Max Kinematic Viscosity
500 mm2/s
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Min Kinematic Viscosity
2.8 mm2/s
Min Pilot Pressure (2-spool, Spring)
14 bar
Mounting Bolt Torque (m10)
58 Nm
Mounting Bolts (main)
4 × M10 × 60
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-07-07-0-05
Seal Material
FKM
Valve Size
NG16
1620 Old Apex Road
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