Bosch Rexroth | 4WEH22E7X6EG24N9K4
4WEH22E7X/6EG24N9K4
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The 4WEH22E7X/6EG24N9K4 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. Designed to route hydraulic oil in automated machinery, it fits manifolds using the NG25 nominal size. The internal spool follows symbol E and offers three positions, enabling forward flow, reverse flow, or a spring-centered neutral state. Main flow capacity reaches 450 l/min, and the working ports P, A, and B accept operating pressures up to 280 bar, while port T is limited to 250 bar. Pilot oil enters externally through port X and returns through port Y so that pilot pressure does not load the tank gallery. The pilot circuit can be driven as high as 210 bar and needs at least 10.5 bar to overcome the centering springs and shift the spool.
Mounting follows the ISO 4401-10-09-0-05 porting pattern, and the valve body must be secured with screws tightened to 100 Nm to preserve sealing surfaces. Electrical control is connected through a DIN EN 175301-803 K4 plug, allowing rapid coil replacement during maintenance. The two-solenoid, spring-centered assembly weighs 19.0 kg, a consideration when positioning the component on overhead plates. Fluid cleanliness should not exceed ISO 4406 (c) code 20/18/15 to maintain consistent metering edges. The mean time to dangerous failure is projected at 100 years, supporting long intervals between safety reviews in industrial hydraulic equipment. Proper adherence to these installation and fluid guidelines ensures the valve cycles reliably under the rated flow and pressure conditions.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (symbol E)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Screw Torque
100 Nm
Mttfd
100 years
Nominal Size
NG25
Pilot Oil Return
Y External
Pilot Oil Supply
X External
Port T Max Pressure
250 bar
Porting Pattern
ISO 4401-10-09-0-05
Spool Positions
3
Spool Symbol
E
Weight (2-solenoid, Spring-centered)
19.0 kg
1620 Old Apex Road
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