Bosch Rexroth | 4WEH22J7X6EW110N9S2K4
4WEH22J7X/6EW110N9S2K4
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The 4WEH22J7X/6EW110N9S2K4 valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits and relies on a nominal size of NG25, which establishes the port cross-section for medium to high flow systems. The unit follows the ISO 4401-08-08-0-05 porting pattern so it aligns with standard subplates. During operation it can pass up to 450 l/min under symbol J, and the main ports tolerate 280 bar. Pilot oil is supplied externally; the control line must therefore deliver at least 10.5 bar and may reach 210 bar without exceeding design limits. A spring-centered stage consumes 7.64 cm³ of pilot volume each cycle, influencing response time and accumulator sizing.
The pilot return gallery handles 160 bar and the tank port withstands 250 bar, parameters that determine back-pressure allowance when sizing downstream plumbing. Switching time is tuned through a discharge control adjustment, enabling users to match spool movement to circuit dynamics. A concealed manual override permits local actuation for setup while preventing inadvertent operation in service. Electrical power reaches the solenoid via a DIN EN 175301-803 connector, and oil cleanliness must not exceed ISO 4406 class 20/18/15 to preserve the spool fit. Installation uses six M12 × 60 screws that secure the body to the manifold, and the calculated mean time to dangerous failure for this type is 100 years.
Technical Specifications
Cleanliness Class (iso 4406)
20/18/15
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed
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, Ac)
160 bar
Max Tank Port Pressure (t)
250 bar
Min Pilot Pressure (x External)
10.5 bar
Mounting Screws
M12 x 60 (6 pcs)
Mttfd (type Weh)
100 years
Nominal Size
NG25 (W.H 22)
Pilot Oil Supply
External
Pilot Volume (spring-centered)
7.64 cm3
Porting Pattern
ISO 4401-08-08-0-05
Switching Time Adjustment
Discharge Control
1620 Old Apex Road
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