Bosch Rexroth | H-4WEH25L6X6EW110N9ETDALB10D3V
H-4WEH25L6X/6EW110N9ETDAL/B10D3V
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The H-4WEH25L6X/6EW110N9ETDAL/B10D3V valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth. It directs hydraulic flow in automated machinery by shifting a spool to connect or block pressure lines. The unit is built in size NG25 so it mounts on standardized subplates intended for 25 mm nominal passages. A porting pattern of ISO 4401-08-08-0-05 aligns the body ports with manifold channels and keeps installation consistent across systems. The spool carries symbol L, giving the flow paths required for high-capacity circuits, and the assembly reaches a maximum flow of 650 l/min when the spool operates at 350 bar. Operating channels p, A, and B tolerate up to 350 bar without derating. A concealed manual override is included to permit service actuation while protecting the button from accidental use. Fluoroelastomer FKM seals are fitted so the valve resists common hydraulic fluids at elevated temperature.
Internal pilot oil management simplifies the control section; both the pilot supply and the pilot return follow the ET arrangement, so external drain lines are not needed. Pilot control can rise to 250 bar, yet an integrated pressure-reducing stage marked D3 limits the pilot circuit to 45 bar to protect the solenoids. When the spring-centered spool is at rest, a minimum pilot pressure of 13 bar is necessary to shift it, while the internal Ac return path can withstand 160 bar during dynamic movement. A Ø1.0 mm throttle insert identified as B10 sits in the pilot gallery to damp pressure spikes and refine switching response. Together these features allow dependable positioning of the main spool under varying loads and ensure consistent directional control within hydraulic automation systems.
Technical Specifications
Manual Override
Concealed
Max Flow (spool L, 350 Bar)
650 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
13 bar
Pilot Oil Return
Internal (ET)
Pilot Oil Supply
Internal (ET)
Pilot Pressure Reduced To
45 bar
Pilot Return Pressure (internal, Ac)
160 bar
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve
D3
Seal Material
FKM
Size
NG25
Spool Symbol
L
Throttle Insert
Ø1.0 mm (B10)
1620 Old Apex Road
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