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The 4WEH22E7X/6EG24N9EK4/B10 directional spool valve is produced by Bosch Rexroth in the WEH Directional Spool Valves series and directs hydraulic flow in automated systems. With a nominal size of NG25, the unit matches manifolds engineered for medium-frame circuits. The porting pattern follows ISO 4401-08-08-0-05 so the valve aligns with standardized subplates in this size range. When spool code E is fitted, the valve passes up to 450 l/min, allowing high actuator speeds. Ports p, a, and b tolerate 280 bar, while port T withstands 250 bar, establishing the maximum working pressures across supply and return lines. Pilot actuation is permitted up to 210 bar and remains reliable down to 10.5 bar in the spring-centered version. A pilot volume of 7.64 cm³ determines the amount of fluid required to shift the spool and influences the response time.
For electrical and mechanical integration, the valve is energized by a 24 V DC supply and accepts a plug built to DIN EN 175301-803, simplifying wiring in control cabinets. A concealed manual override lets maintenance staff shift the spool locally without exposing the mechanism to contaminants. Flow to the pilot stage can be metered by a Ø1.0 mm throttle insert, giving designers a way to damp pressure spikes. The cleanliness class is ISO 4406 20/18/15, indicating the filtration level needed to protect internal lands from wear. Subplate mounting supports quick replacement without disturbing pipe runs, and a weight of 11.9 kg must be considered when selecting manifold brackets. An MTTFd of 100 years reflects the statistical functional lifetime of the safety-related parts, ensuring long service intervals in continuous operation.
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed
Max Flow (spool E)
450 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Max Pressure Port T
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Type
Subplate Mounting
Mttfd
100 years
Nominal Size
NG25
Pilot Volume (spring-centered)
7.64 cm3
Porting Pattern
ISO 4401-08-08-0-05
Supply Voltage
24 V DC
Throttle Insert
Ø1.0 mm
Weight (2-solenoid, Spring-centered)
11.9 kg
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