Bosch Rexroth | 4WEH22J7X6EG24N9ETS2DK25LB10D3
4WEH22J7X/6EG24N9ETS2DK25L/B10D3
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The 4WEH22J7X/6EG24N9ETS2DK25L/B10D3 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth. It directs hydraulic flow in automated circuits where high response and internal piloting are required. The nominal size is 25, matching the ISO 4401-08-08-0-05 porting pattern for easy manifold integration. A J-type spool provides three distinct positions to route oil for extend, neutral, and retract functions. Maximum flow capacity reaches 450 l/min, supporting large actuators without excessive pressure drop. Ports A and B tolerate operating pressures up to 280 bar so the valve can work in high-pressure systems. The pilot solenoid runs on a 24 V DC supply which simplifies connection to common machine controls. A concealed N9 manual override permits local switching while protecting the mechanism from accidental actuation.
Internal ET piloting feeds and returns control oil from the main pressure gallery, eliminating external pilot lines. The pilot stage accepts pressures up to 210 bar and returns oil at the same limit, ensuring consistent function under high load. When the spring centers the spool, reliable actuation begins once pilot pressure exceeds 10.5 bar. A secondary pressure reducing valve limits pilot circuit pressure to 45 bar to protect the discharge control components. The S2 switching time adjustment enables discharge control of pilot flow so users can tailor shift speed. A B10 throttle insert with a 1.0 mm diameter orifice further fine-tunes response by restricting pilot oil. These hydraulic features coordinate to move the main spool smoothly and prevent shock in connected lines. By integrating all control elements within the valve body, the design reduces installation work and minimizes leakage points.
Technical Specifications
Manual Override
N9 (Concealed)
Max Flow (j, Ng25 W.h 22)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Max Pilot Return Pressure (internal)
210 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Nominal Size
25
Pilot Oil Return
Internal (ET)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve (secondary)
45 bar
Spool Positions
3
Spool Symbol
J
Supply Voltage (pilot Valve)
24 V DC
Switching Time Adjustment
S2 (Discharge Control)
Throttle Insert
B10 (Ø1.0 mm)
1620 Old Apex Road
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