Bosch Rexroth | 4WEH22HC7X6EW110N9TK4V
4WEH22HC7X/6EW110N9TK4/V
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The 4WEH22HC7X/6EW110N9TK4/V valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and serves to route hydraulic flow in automated machines. It is an electro-hydraulic device with a nominal size of NG25, matching the ISO 4401-08-08-0-05 mounting pattern for block or sub-plate installation. The HC spool design supports a maximum flow of 450 l/min, allowing high-capacity circuits to run without restrictive losses. A 4WE 6E high-power pilot valve shifts the main spool, and hydraulic force returns the spool to center once the pilot signal is removed. External pilot oil supply through port X keeps control pressure stable, while the spent pilot fluid drains internally to port T so no separate return line is required. These features combine to simplify piping and to maintain fast, repeatable switching under demanding throughput conditions.
The hydraulic circuit can operate at line pressures up to 280 bar on ports P, A, and B, while the tank port tolerates 250 bar, making the unit suitable for heavy industrial loads. Pilot control withstands 210 bar and functions reliably down to a minimum pilot pressure of 8 bar, ensuring secure end-positioning even when system pressure drops. Electrical actuation is provided through a DIN EN 175301-803 connector coded K4, supporting quick coil replacement during service. A concealed manual override identified by code N9 lets technicians shift the valve without energizing the solenoid for setup or fault recovery. Functional safety is supported by an MTTFd of 100 years, giving long statistical operating life in continuous-duty applications. Together, these pressure ratings, connection details, and service provisions allow the valve to integrate directly into modern electro-hydraulic control architectures.
Technical Specifications
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (hc Symbol)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Operating Pressure (t)
250 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (hydraulic End Pos)
8 bar
Mttfd (type Weh)
100 years
Nominal Size
NG25 (W.H 22)
Pilot Control Valve
4WE 6E High-Power
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-08-08-0-05
Spool Symbol
HC
Type Of Actuation
Electro-Hydraulic
1620 Old Apex Road
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