Bosch Rexroth | 4WEH22J7X6EG24N9K4B08
4WEH22J7X/6EG24N9K4/B08
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The 4WEH22J7X/6EG24N9K4/B08 valve is part of the WEH Directional Spool Valves series manufactured by Bosch Rexroth for controlling actuator motion in hydraulic automation. It uses electro-hydraulic actuation so a 24 V DC signal moves the main spool through a pilot stage, allowing remote command without manual effort. The unit follows a 4-way configuration which routes pressure, tank, and two working lines to manage bidirectional cylinder or motor circuits. A porting pattern of ISO 4401-08-08-0-05 matches standard subplates in NG25 size, simplifying manifold mounting. Pilot oil is supplied externally through X and Y ports, enabling independent pressure selection and reducing heat in the main line. The spool is returned to center by springs, so flow stops automatically when the coil is de-energized. A minimum pilot pressure of 10.5 bar is required for this spring-centered design while the pilot stage may be loaded up to 210 bar without damage.
Rated for a continuous flow of 450 l/min under symbol J, the valve handles operating pressures up to 280 bar at ports P, A, and B to suit high-power circuits. A throttle insert with a 0.8 mm diameter can be fitted to stabilize pilot oil flow when the supply line is remote. Electrical interface is provided by a DIN EN 175301-803 K4 connector that supports fast coil replacement and consistent sealing. A concealed manual override lets maintenance staff shift the spool during commissioning without exposing moving parts. The surface coating reaches a maximum thickness of 100 µm to resist corrosion in humid plant environments, while fluid cleanliness must meet ISO 4406 class 20/18/15 to protect the precision lands and seals.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Control Spool Return
Springs
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed
Max Flow (symbol J)
450 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Pilot Oil Configuration
External (X, Y)
Porting Pattern
ISO 4401-08-08-0-05
Size
NG25
Surface Protection Max Thickness
100 µm
Throttle Insert
Diameter 0.8 mm
Voltage
24 V DC
Way Configuration
4-Way
1620 Old Apex Road
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