Bosch Rexroth | 4WEH22GB766EG24N9TDAVB15
4WEH22GB76/6EG24N9TDAVB15
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The 4WEH22GB76/6EG24N9TDAVB15 directional spool valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for hydraulic automation systems where remote pilot operation is required. It is a size 25 unit, so the flow passages accommodate up to 200 l/min when the G-type spool is shifted at 280 bar. The solenoid coils operate on 24 V DC to energize the integrated 6E pilot control valve, and the external pilot oil supply through port X keeps the main stage isolated from system pressure peaks. Internal return via port T carries pilot oil back to tank without additional plumbing. The G-coded spool establishes the required load paths while the maximum operating pressure of 280 bar on ports P, A, and B, and 250 bar on port T, let the valve fit medium-pressure circuits.
Pilot operation remains stable because the manifold can provide up to 210 bar at the pilot stage, and reliable centering is maintained once pressure falls below the 10.5 bar minimum. A concealed N9 manual override permits local actuation for service without exposing the mechanism to contamination. The valve uses FKM seals so it can handle higher temperatures and aggressive fluids common in industrial hydraulics. A Ø 1.5 mm throttle insert labeled B15 is fitted to damp pressure surges in the pilot gallery. Connection to the stack manifold follows the ISO 4401-08-08-0-05 pattern, simplifying interchange with other NG25 components. Two spring-centered solenoids bring the assembled weight to 11.9 kg, which is acceptable for panel mounting inside power units.
Technical Specifications
Coil Voltage
24 V DC
Manual Override
Concealed (N9)
Max Flow (symbol G, 280 Bar)
200 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Max Tank Port Pressure (t)
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Pilot Control Valve
6E
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM (V)
Spool Symbol
G
Throttle Insert
Ø 1.5 mm (B15)
Valve Size (ng)
25
Weight (2 Solenoids, Spring-centered)
11.9 kg
1620 Old Apex Road
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