Bosch Rexroth | 4WH22E7XV
4WH22E7X//V
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The 4WH22E7X//V valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series. It is a hydraulic-actuated 4-way unit intended to shift flow paths in automated circuits. The valve is built in size NG25, allowing a nominal flow rate up to 450 l/min for medium to high volume lines. Installation is performed on a subplate and follows the ISO 4401-08-08-0-05 porting pattern, so interchange with standard manifolds is straightforward. Pilot control oil enters through the external X port, while the return leaves through the external Y port to separate pilot drainage from the main flow path.
The spring-centered design requires at least 10.5 bar pilot pressure to move the spool and tolerates pilot pressures as high as 210 bar. Working ports P, A, and B can be pressurized to 280 bar, whereas port T is limited to 250 bar and the external Y port to 210 bar. Fluid cleanliness must meet class 20/18/15 under ISO 4406 to protect sliding surfaces, and FKM seals resist high-temperature oil and additives used in industrial systems. The mean time to dangerous failure for this type is calculated at 150 years, supporting long service intervals in safety-related hydraulic automation.
Technical Specifications
Actuation
Hydraulic
Cleanliness Class
20/18/15 (ISO 4406)
Max Flow
450 l/min
Max Pilot Pressure
210 bar
Max Pressure (port T)
250 bar
Max Pressure (port Y External)
210 bar
Max Pressure (ports P,a,b)
280 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Type
Subplate
Mttfd (type Wh)
150 years
Pilot Oil Return
External (Y)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM
Size
NG25
Way Configuration
4-way
1620 Old Apex Road
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