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The 4WEH16J7X/6EG24N9DA valve is produced by Bosch Rexroth and belongs to the WEH Directional Spool Valves series. It shifts oil paths in automated hydraulic machinery where electrical commands need to reposition actuators quickly and under load. Actuation is electro-hydraulic, so a pilot stage driven by a 24 V DC coil moves the main spool. A concealed N9 manual override permits manual shifting during commissioning or power loss. Size NG16 construction follows the ISO 4401-07-07-0-05 porting pattern, easing manifold mounting. The unit carries a J spool with three spring-centered positions and needs at least 14 bar pilot pressure to leave center. Pilot oil enters through external port X, and return oil exits through external port Y.
This four-way configuration provides four flow paths that alternately connect pressure, tank, and two work ports during each command cycle. Continuous service is allowed up to 280 bar on ports P, A, and B, while port T handles 250 bar and the separate drain port Y is limited to 210 bar. System throughput reaches 300 l/min with the specified flow characteristics, making the unit suitable for high-demand circuits. The pilot stage can accept supply pressures as high as 250 bar, giving designers flexibility when locating the control source. These limits define safe operating envelopes and permit rapid, repeatable motion control in presses, injection units, and other large-scale hydraulic equipment.
Actuation
Electro-Hydraulic
Coil Voltage
24 V DC
Manual Override
Concealed (N9)
Max Flow (symbol J)
300 l/min
Max Pilot Pressure
250 bar
Max Pressure (p, A, B)
280 bar
Max Pressure Port T
250 bar
Max Pressure Port Y (external)
210 bar
Min Pilot Pressure
14 bar (3-Pos Spring-Centered)
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
Spool Positions
3-Position Spring-Centered
Spool Symbol
J
Valve Type
4-Way Directional Spool Valve
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