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The 4WEH10D4X/OF6EG24N9ETS2DK24L directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated machinery. It is built in NG10 size so it mounts on manifolds with a nominal 10 mm passage. The D-coded spool offers two positions, allowing choice between two discrete flow paths. Because the detent is configured without a spring return, external pilot force must shift and hold the spool in each position. Actuation is provided by a 24 V DC solenoid that drives a 6E pilot valve, with an internal pilot supply that removes the need for a separate feed line. For maintenance, a concealed manual override identified as N9 lets technicians operate the pilot stage without electrical power.
The valve handles flows up to 160 l/min, while ports p, A, and B are rated for 280 bar; the tank port t carries the same 280 bar limit. An internal Y-port tolerates 210 bar when direct-current coils are used. The pilot circuit works at pressures up to 250 bar and stays functional down to 10 bar, supporting a wide control range. An internal pilot return, marked ET, eliminates an external drain connection. Switching behavior can be tuned with the discharge adjustment coded S2 to match circuit damping and reduce pressure shock during spool transitions.
Manual Override
Concealed (N9)
Max Flow
160 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Operating Pressure (t)
280 bar
Max Pilot Pressure
250 bar
Minimum Pilot Pressure
10 bar
Pilot Return
Internal (ET)
Pilot Supply
Internal (ET)
Pilot Valve Type
6E
Solenoid Voltage
24 V DC
Spool Detent
Without Spring Return (OF)
Spool Positions
2
Spool Symbol
D
Switching Time Adjustment
Discharge (S2)
Valve Size
NG10
Y-port Max Pressure (internal)
210 bar (DC)
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