Bosch Rexroth | 4WEH22G7X6EG24N9DA
4WEH22G7X/6EG24N9DA
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The 4WEH22G7X/6EG24N9DA directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and is intended to route hydraulic fluid in automated equipment. Its nominal size of NG25 defines the mounting face and supports medium to high flow circuits, while the ISO 4401-08-08-0-05 porting pattern allows direct fitting onto standardized subplates. A G-coded spool provides a flow path suited for cylinder control with a closed center when centered. The valve passes up to 200 l/min at 280 bar, giving fast actuator speeds without undue pressure loss. Working pressure at ports P, A, and B can reach 280 bar, whereas the return port T is limited to 250 bar to protect tank lines. The drain port Y, also identified as Dc, is rated for 210 bar so pilot oil can be exhausted safely. A 24 V DC solenoid coil shifts the spool, enabling direct connection to common machine controllers.
The concealed manual override designated N9 lets maintenance staff move the spool during power loss while preventing accidental operation. The pilot stage tolerates 210 bar, permitting use with high pilot pressures, and the spring-centered design needs at least 10.5 bar pilot pressure to overcome the centering force. Achieving the shortest switching time calls for 35 l/min pilot flow, and each three-position stroke displaces 7.64 cm³ of pilot oil, data that assists in sizing the pilot supply. External X and Y lines feed and return the pilot oil so pilot performance stays independent of main line fluctuations. Hydraulic fluid must meet ISO 4406 cleanliness class 20/18/15 to limit wear on precision parts. The complete valve with two solenoids and the centering spring weighs 11.9 kg, a factor considered when selecting mounting brackets and handling methods.
Technical Specifications
Manual Override
Concealed (N9)
Max Flow (spool G, 280 Bar)
200 l/min
Max Pilot Pressure
210 bar
Max Pressure (p,a,b)
280 bar
Max Pressure (port T)
250 bar
Max Pressure (port Y, Dc)
210 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Nominal Size
NG25
Oil Cleanliness
ISO 4406 20/18/15
Pilot Flow (shortest Switching)
35 l/min
Pilot Oil Supply/return
External (X,Y)
Pilot Volume (3-position)
7.64 cm3
Porting Pattern
ISO 4401-08-08-0-05
Rated Voltage
24 V DC
Spool Symbol
G
Weight (2 Solenoids, Spring)
11.9 kg
1620 Old Apex Road
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