Bosch Rexroth | H-4WEH25G6X6EW110N9K4
H-4WEH25G6X/6EW110N9K4
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The H-4WEH25G6X/6EW110N9K4 valve belongs to Bosch Rexroth’s WEH Directional Spool Valves series and is used to direct fluid flow in hydraulic automation systems. Electro-hydraulic actuation lets a small electrical signal shift the pilot stage so the NG25 main spool can move under load without large solenoids. The spool symbol G establishes flow paths appropriate for typical supply and actuator lines, while three spool positions give extend, retract, and neutral states to connected cylinders. An ISO 4401 porting pattern ensures compatibility with standard manifolds, and the subplate mounting arrangement fixes the body to those manifolds without extra piping.
The pressure-centered design returns the spool to center with pilot oil, maintaining a safe neutral state; this feature requires a minimum pilot pressure of 18 bar and tolerates up to 250 bar on the pilot side while the main stage holds 350 bar system pressure. Cleanliness class ISO 4406 (c) 20/18/15 limits particle contamination to protect tight clearances. A DIN EN 175301-803 (K4) connector supplies power to the coils and seals against oil ingress for dependable operation.
Technical Specifications
Actuation Type
Electro-Hydraulic
Centering Method
Pressure-Centered
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connector
DIN EN 175301-803 (K4)
Max Operating Pressure
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (pressure-center)
18 bar
Mounting Type
Subplate Mounting
Porting Pattern
ISO 4401
Spool Positions
3
Spool Symbol
G
Valve Size
NG25
1620 Old Apex Road
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