Bosch Rexroth | 4WH22C7XV
4WH22C7X/V
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The 4WH22C7X/V directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is intended for hydraulic automation where fast, repeatable flow direction changes are required. It is hydraulically actuated, carries a nominal size of 25 (NG25), and follows the ISO 4401-08-08-0-05 porting pattern so it mounts directly on standardized subplates. The valve passes up to 450 l/min and tolerates 280 bar on pressure and service ports P, A, and B, enabling control of large cylinders and motors. FKM seals provide chemical resistance for common hydraulic fluids, and operation is specified with oil cleanliness at ISO 4406 20/18/15.
An external pilot supply enters through port X and may reach 210 bar, while reliable shifting begins once 11 bar is available. Pilot oil returns through port Y, which is permitted up to 210 bar, and the tank port T withstands 250 bar without compromising the housing. Each actuation cycle displaces 15.28 cm³ of pilot oil, informing accumulator and line sizing. The mean time to dangerous failure is calculated at 150 years, highlighting the valve’s suitability for safety-relevant hydraulic drives.
Technical Specifications
Actuation
Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Max Flow
450 l/min
Max Pilot Pressure
210 bar
Max Pressure P,a,b
280 bar
Max Pressure Port T
250 bar
Max Pressure Port Y
210 bar
Min Pilot Pressure
11 bar
Mttfd
150 years
Nominal Size
25 (NG25)
Pilot Oil Return
Y External
Pilot Oil Supply
X External
Pilot Volume
15.28 cm³
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM
1620 Old Apex Road
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