Bosch Rexroth | H-4WEH25C6X6EG24N9TDAV
H-4WEH25C6X/6EG24N9TDA/V
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The H-4WEH25C6X/6EG24N9TDA/V valve is manufactured by Bosch Rexroth within the WEH Directional Spool Valves series. It directs hydraulic flow to actuators in automated systems and fits circuits that use a nominal size NG25 mounting interface. The porting pattern follows ISO 4401 to simplify manifold design and replacement. When spool type C is operated at 350 bar the unit passes up to 650 l/min, while working ports P, A, and B tolerate the same 350 bar continuous pressure. The tank port Y endures 210 bar when internally connected in direct-current service. Pilot oil is supplied externally through port X and returns internally through port T, and a 24 V DC solenoid energizes the pilot poppet. Acceptable oil viscosity ranges from 2.8 to 500 mm²/s, and the assembly weighs 17.6 kg with one solenoid installed.
Reliable shifting requires pilot pressure to remain between the 13 bar minimum for the two-spool spring design and the 250 bar maximum rating of the control stage. FKM seals allow operation with fluid temperatures from −15 to +80 °C and ambient air between −15 and +50 °C. The hydraulic medium must meet ISO 4406 cleanliness code 20/18/15 to protect the spool and seats from abrasive wear. Adhering to these limits ensures consistent performance and guards downstream actuators against pressure disturbances routed through the NG25 directional valve.
Technical Specifications
Ambient Temp Range (fkm)
-15 to +50 °C
Cleanliness Class
ISO 4406 (c) 20/18/15
Fluid Temp Range (fkm)
-15 to +80 °C
Max Flow (spool C At 350 Bar)
650 l/min
Max Pressure (p,a,b)
350 bar
Max T Pressure (y Internal, Dc)
210 bar
Nominal Size
NG25
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Pressure Max
250 bar
Pilot Pressure Min (2-spool Spring)
13 bar
Porting Pattern
ISO 4401
Seal Material
FKM
Solenoid Voltage (pilot)
24 V DC
Viscosity Range
2.8 to 500 mm2/s
Weight (one Solenoid)
17.6 kg
1620 Old Apex Road
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