Bosch Rexroth | H-4WEH25D6X6EG24N9ETK4B10D3
H-4WEH25D6X/6EG24N9ETK4/B10D3
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The H-4WEH25D6X/6EG24N9ETK4/B10D3 valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for use in hydraulic automation circuits. It is an electro-hydraulic 4-way unit that directs flow through an NG25 port group while employing spool symbol D to define the switching pattern. Pilot oil is supplied internally from port P and returned internally to port T, eliminating external pilot lines. The assembly tolerates a maximum operating pressure of 350 bar in the main ports and relies on a 24 V DC solenoid fed through a DIN EN 175301-803 K4 connector. These design points allow compact installation where electrical actuation must reliably shift high-pressure oil paths.
Control stability is supported by an integrated D3 pressure reducing valve that limits pilot pressure to 45 bar while permitting a maximum pilot pressure of 250 bar when needed for dynamic shifts. A concealed N9 manual override allows local actuation during commissioning without exposing moving parts. Flow damping is provided by a B10 throttle insert with a 1.0 mm orifice, helping to moderate signal oil when the valve changes state. All external surfaces carry a protective coating no thicker than 100 µm to resist corrosion in industrial environments and maintain dimensional accuracy over the valve’s service life.
Technical Specifications
Actuation Type
Electro-Hydraulic
D3 Secondary Pressure
45 bar
Electrical Connector
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Maximum Operating Pressure
350 bar
Maximum Pilot Pressure
250 bar
Pilot Oil Return
Internal (to T)
Pilot Oil Supply
Internal (from P)
Pressure Reducing Valve
D3
Size
NG25
Spool Symbol
D
Supply Voltage
24 V DC
Surface Protection
Coating ≤ 100 µm
Throttle Insert
Ø 1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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