Bosch Rexroth | H-4WEH25E6X6EW110N9ETK4B08D3
H-4WEH25E6X/6EW110N9ETK4/B08D3
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The H-4WEH25E6X/6EW110N9ETK4/B08D3 directional spool valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth. It routes pressurized fluid to hydraulic actuators under automated electrical command. The unit is electro-hydraulically actuated, so a pilot stage translates solenoid signals into hydraulic force that shifts the main spool. As a size NG25, four-way device with three spool positions, it uses the E-coded spool geometry to establish the required flow paths. The spool is returned to center by springs when pilot pressure is removed. Pilot oil is taken internally from port P and returned to tank through port T, with a minimum of 13 bar and a maximum of 250 bar available to move the spool; a secondary pilot limit of 45 bar protects the pilot circuit.
Operating channels p, a, and b are rated for 350 bar, allowing the valve to handle systems working at high pressure. At that pressure it can pass up to 650 l/min, supporting large cylinder or motor flows. The mounting interface follows ISO 4401-08-08-0-05, so it installs on standard subplates. Hydraulic fluid must meet cleanliness class ISO 4406 20/18/15 to prevent internal wear. A concealed N9 manual override lets maintenance personnel shift the spool without electrical power. These characteristics provide straightforward integration into hydraulic machinery that requires dependable directional control.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Main Valve Return
Spring-Centered
Manual Override
Concealed (N9)
Max Flow (e At 350 Bar)
650 l/min
Max Operating Pressure (p,a,b)
350 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure
13 bar
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (P)
Pilot Secondary Pressure (d3)
45 bar
Porting Pattern
ISO 4401-08-08-0-05
Size
NG25
Spool Positions
3
Spool Symbol
E
Way Configuration
4-Way
1620 Old Apex Road
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