Bosch Rexroth | 4WEH22G7X6EG24N9S2K4P45
4WEH22G7X/6EG24N9S2K4/P4.5
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The 4WEH22G7X/6EG24N9S2K4/P4.5 valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth. It directs flow in hydraulic circuits where remote electrical control is needed for cylinders or motors. The unit is built in size NG25, providing passage dimensions for medium-flow manifolds. Its 4-way function establishes one pressure port, two service ports, and a tank port for bidirectional actuator movement. Electro-hydraulic actuation converts the 24 V DC coil signal into pilot oil movement, and the integrated 6E pilot valve performs the preliminary switching step. The porting pattern follows ISO 4401-08-08-0-05, allowing direct mounting on standardized subplates. A DIN EN 175301-803 plug handles the electrical connection, while a concealed manual override identified as N9 lets technicians shift the spool locally if power is unavailable.
The main stage is rated for 280 bar on pressure, A, and B ports, with port T accepting up to 250 bar to accommodate back-pressure conditions. Pilot supply may rise to 210 bar, and the same limit applies to the pilot return line at port Y, ensuring balanced pilot circuitry. A preload valve opens at 4.5 bar to guarantee sufficient pilot flow before movement starts. Switching speed can be tuned through discharge control coded S2 to match system dynamics. Oil cleanliness must reach ISO 4406 class 20/18/15 to prevent spool sticking and wear. Installation requires six M12 × 60 class 10.9 screws that clamp the valve to its subplate and maintain the pressure seal. This configuration completes the specification set without adding unlisted features.
Technical Specifications
Actuation
Electro-hydraulic
Cleanliness Class
ISO 4406 20/18/15
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Return Pressure Y (dc)
210 bar
Max Pressure Port T
250 bar
Maximum Pilot Pressure
210 bar
Mounting Screws
6x M12 x 60 (10.9)
Pilot Valve Type
6E
Porting Pattern
ISO 4401-08-08-0-05
Preload Valve Cracking Pressure
4.5 bar
Size
NG25
Switching Time Adjustment
Discharge Control (S2)
Valve Function
4-way
1620 Old Apex Road
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