Bosch Rexroth | 4WEH22J7X6EW110N9ETK4B08V
4WEH22J7X/6EW110N9ETK4/B08V
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The 4WEH22J7X/6EW110N9ETK4/B08V directional spool valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for hydraulic flow control in automated machinery. With a nominal size of NG25, it fits circuits that require this port dimension, and its ISO 4401-08-08-0-05 porting pattern allows direct mounting on standard subplates. A maximum flow of 450 l/min under symbol J enables high-volume operation, while ports P, A, and B accept pressures up to 280 bar. Actuation is provided by a High-Power 6E solenoid, and the coil operates on 110 V AC, simplifying power distribution. Wiring is completed through a DIN EN 175301-803 K4 connector that seals the electrical entry. A Ø 0.8 mm throttle insert designated B08 meters pilot flow to damp spool movement and reduce shock during transitions.
Pilot oil is supplied internally under the ET arrangement, eliminating an external feed line, and it also returns internally, which reduces manifold complexity. The pilot stage tolerates up to 210 bar, but return flow must stay below 160 bar to protect the centering springs. The tank port withstands 250 bar, supporting circuits that impose back-pressure for energy recovery. For spring-centered operation the pilot pressure must reach at least 10.5 bar before the spool will shift, ensuring consistent actuation. Fluid cleanliness should meet ISO 4406 (c) 20/18/15 to prevent abrasive wear on the precision lands. A mean time to dangerous failure of 100 years underscores the reliability demanded in safety-related hydraulic controls, and this service life expectation supports long duty cycles in continuous manufacturing environments.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Coil Voltage
110 V AC
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (symbol J)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Max Pilot Return Pressure (y Internal, Ac)
160 bar
Max Tank Port Pressure (t)
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mttfd
100 years
Nominal Size
NG25
Pilot Oil Return
Internal (ET)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-08-08-0-05
Solenoid Type
High-Power 6E
Throttle Insert
Ø 0.8 mm (B08)
1620 Old Apex Road
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