Bosch Rexroth | H-4WEH25J6X6EG24N9ETS2K4B10D3V
H-4WEH25J6X/6EG24N9ETS2K4/B10D3/V
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The H-4WEH25J6X/6EG24N9ETS2K4/B10D3/V directional spool valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for hydraulic automation tasks that require reliable flow control. It employs a J-type spool that is spring-centered to return the valve to neutral when power is removed. Two wet-pin solenoids energized at 24 V DC shift the spool, providing electrical actuation without external pilot lines. The valve is built to the NG25 nominal size and can pass up to 520 l/min at 350 bar through ports P, A, and B. Both pilot oil supply and pilot oil return are internal, identified as ports E and T respectively, which simplifies installation in compact manifolds. A B10 throttle insert in pilot port P moderates pilot flow and stabilizes spool movement under varying load conditions.
The pilot stage tolerates up to 250 bar, while the internal pilot return path is limited to 210 bar to prevent excessive back-pressure. A D3 pressure-reducing valve is included to keep pilot pressure constant during operation. The body follows the ISO 4401 porting pattern, allowing direct mounting on standardized subplates. FKM seals are fitted to withstand high temperatures and aggressive hydraulic fluids. An MTTFd value of 100 years underpins the valve’s suitability for continuous-duty machinery where long service life is critical.
Technical Specifications
Max Flow (symbol J, 350 Bar)
520 l/min
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y Int)
210 bar
Mttfd
100 years
Nominal Size
NG25 (W.H 25)
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (E)
Porting Pattern
ISO 4401
Pressure Reducing Valve
D3 Included
Seal Material
FKM (V)
Solenoids
2
Spool Return
Spring-Centered
Spool Symbol
J
Supply Voltage
24 V DC
Throttle Insert
B10 In Pilot Port P
1620 Old Apex Road
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