Bosch Rexroth | 4WEH16HD7X6EG24N9S2K4
4WEH16HD7X/6EG24N9S2K4
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The 4WEH16HD7X/6EG24N9S2K4 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated machinery. It employs electro-hydraulic actuation so an electrical pilot signal controls oil movement to shift the spool. A 24 V DC coil energizes the pilot stage and allows direct connection to machine controls. With a nominal size of NG16, the unit handles up to 300 l/min to serve mid-range circuits, and the working ports tolerate 280 bar for high-pressure lines. Two spool positions establish the required flow paths, and a hydraulic return forces the spool back when the pilot current is removed. A concealed manual override lets technicians move the spool mechanically during commissioning or troubleshooting.
The valve mounts on an ISO 4401-07-07-0-05 interface, enabling quick exchange on standardized subplates. External pilot supply at port X separates the control pressure from load variations, while an external pilot return at port Y discharges oil directly to tank. The pilot circuit functions between 14 bar and 250 bar, and port Y withstands up to 210 bar to accommodate pressure spikes. Connection to the coil is made through a DIN EN 175301-803 K4 plug, which matches common industrial wiring systems. Switching time can be trimmed with the S2 discharge control so users can reduce shock in cylinders or motors.
Technical Specifications
Actuation
Electro-Hydraulic
Coil Voltage
24 V DC
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (hd, Ng16)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port Y (external, Dc)
210 bar
Min Pilot Pressure
14 bar
Mounting Interface
ISO 4401-07-07-0-05
Nominal Size
NG16
Pilot Return
External (Y)
Pilot Supply
External (X)
Spool Positions
2
Switching Time Adjustment
Discharge Control (S2)
1620 Old Apex Road
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