Bosch Rexroth | 4WEH22G7X6EG24N9TDA
4WEH22G7X/6EG24N9TDA
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The 4WEH22G7X/6EG24N9TDA valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth to direct hydraulic flow in automated machinery. It uses a size 25 mounting pattern that matches ISO 4401-08-08-0-05 interfaces, so installation on standard subplates is straightforward. Three spool positions are provided, and the G-coded spool defines the flow paths available to the actuator ports. A spring-centered design returns the spool to its neutral position when pilot pressure is removed, while a concealed N9 manual override lets maintenance staff shift the valve without energizing the solenoid. The pilot stage is the high-power 6E type fed by a 24 V DC coil, giving fast actuation under load. Main ports A, B, and P tolerate up to 280 bar, and with that pressure applied the valve passes as much as 200 L/min, making it suitable for large cylinder circuits.
The hydraulic pilot circuit supplies oil externally through port X and sends the return flow internally to tank via port T, simplifying plumbing in manifolds that lack a separate drain line. The control spring version needs at least 10.5 bar pilot pressure to move the main spool, while both the pilot supply and the pilot return y line may be operated up to 210 bar, allowing consistent response even in high back-pressure systems. Tank port t withstands 250 bar, so the valve can be used where shock pressures are expected at the reservoir connection. To maintain reliability, incoming fluid must meet ISO 4406 cleanliness class 20/18/15, which helps prevent silting in the precision lands and bore.
Technical Specifications
Centering Type
Spring-Centered
Fluid Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow At 280 Bar (spool G)
200 l/min
Max Pilot Pressure
210 bar
Max Pilot Return Pressure (y)
210 bar (DC)
Max Pressure (p, A, B)
280 bar
Max Tank Port Pressure (t)
250 bar
Min Pilot Pressure (3-pos Spring)
10.5 bar
Pilot Oil Configuration
Supply X External, Return T Internal
Pilot Valve Type
6E (High-Power)
Porting Pattern
ISO 4401-08-08-0-05
Size (ng)
25
Spool Positions
3
Spool Symbol
G
Supply Voltage
24 V DC
1620 Old Apex Road
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