Bosch Rexroth | 4WEH22D7X6EW110N9S2K4
4WEH22D7X/6EW110N9S2K4
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The 4WEH22D7X/6EW110N9S2K4 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It operates as a 4-way control element in hydraulic automation by shifting a D-type two-position spool to direct fluid between actuator ports. With an NG25 size interface, the unit passes up to 450 l/min under symbol D flow paths. Channels P, A, and B tolerate 280 bar, while the internal pilot supply accepts pressures to 210 bar. Achieving the shortest switching sequence requires a pilot flow of 35 l/min, and at least 11 bar must be present to move the spring-returned spool. Pilot oil returns externally through port Y, where the line may be pressurized to 160 bar without damage.
The port face matches ISO 4401-08-08-0-05 so it mounts on common subplates, and port T can withstand 250 bar back-pressure. Discharge control identified as code S2 lets technicians fine-tune switching time to suit circuit dynamics. A concealed manual override marked N9 provides mechanical actuation during commissioning or power loss. Electrical excitation is supplied through a DIN EN 175301-803 K4 connector, ensuring quick hookup in control cabinets. These features combine to give the valve precise, adaptable performance within high-pressure hydraulic systems.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (symbol D)
450 l/min
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Pressure
210 bar
Max Pressure Port T
250 bar
Max Pressure Port Y (external, Ac)
160 bar
Min Pilot Pressure (2-pos, Spring End)
11 bar
Pilot Flow For Shortest Switching
35 l/min
Pilot Oil Return
External (Y)
Pilot Oil Supply
Internal (E)
Porting Pattern
ISO 4401-08-08-0-05
Spool Type
D (2-Position)
Switching Time Adjustment
Discharge Control (S2)
Valve Configuration
4-Way
Valve Size
NG25
1620 Old Apex Road
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