Bosch Rexroth | H-4WEH25J6X6EW110N9ETDALB10D3
H-4WEH25J6X/6EW110N9ETDAL/B10D3
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The H-4WEH25J6X/6EW110N9ETDAL/B10D3 valve is manufactured by Bosch Rexroth within the WEH Directional Spool Valves series and directs hydraulic flow in automated machinery. It employs a 4-way configuration to connect or block the NG25 flow paths needed for bidirectional actuator control. A high-power 6E pilot stage shifts the spool while drawing its supply internally, and pilot oil returns through port T so no external drain is required. A concealed N9 manual override allows local movement of the spool without exposing the push pin to accidental contact. The assembly tolerates fluid contamination up to ISO 4406 cleanliness code 20/18/15. Operating pressure reaches 350 bar on ports P, A, and B, enabling control of high-pressure circuits without derating.
The pilot circuitry is rated for 250 bar but needs at least 13 bar to move the three-position spring-centered spool, displacing 14.2 cm³ of oil on each stroke. A factory-set pressure-reducing valve limits pilot pressure to 45 bar to protect the solenoid and seals. Subplate ports X and Y remain closed in the ET configuration, permitting installation where external pilot lines are absent, and a 1.0 mm B10 throttle insert tempers inlet flow to reduce shock. Mechanical mounting follows the ISO 4401-08-08-0-05 pattern and is secured with six M12 × 60 screws for proper clamping. These characteristics allow rapid integration into manifold blocks while ensuring reliable switching in demanding hydraulic automation cycles.
Technical Specifications
Cleanliness Class (iso 4406 (c))
20/18/15
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (3-pos Spring-centered)
13 bar
Mounting Pattern
ISO 4401-08-08-0-05
Mounting Screws
6x M12 x 60
Nominal Size
NG25
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal
Pilot Valve Type
High-Power (6E)
Pilot Volume (3-pos Spring-centered)
14.2 cm3
Pressure Reducing Valve Setting
45 bar (D3)
Subplate Ports X And Y
Closed (ET)
Throttle Insert Orifice
1.0 mm (B10)
Valve Version
4-Way
1620 Old Apex Road
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