Bosch Rexroth | H-4WEH25J6X6EG24N9ETK4N08D3
H-4WEH25J6X/6EG24N9ETK4/N08D3
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The H-4WEH25J6X/6EG24N9ETK4/N08D3 directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs pressure flow in hydraulic automation systems. It is built in size NG25 to suit circuits that need a nominal passage for medium-flow rates. The J spool symbol defines the crossover pattern between ports when the solenoids shift. A standardized porting pattern ISO 4401-08-08-0-05 lets the valve mount directly on compatible subplates. Main ports p, A, and B withstand up to 350 bar, while the pilot stage accepts oil internally through passage ET and releases it internally to T. Pilot operation is possible up to 250 bar, with a required minimum of 13 bar to center the three-position spring mechanism. The pilot return path tolerates 210 bar, and a dedicated D3 secondary circuit limits pressure to 45 bar for auxiliary functions.
The valve interfaces electrically through a DIN EN 175301-803 form K4 connector that carries the 24 V DC supply to the solenoid coil and simplifies plug-in wiring. A concealed N9 manual override offers local spool shift without energizing the coil and reduces the risk of accidental activation. Fluid cleanliness must meet ISO 4406 class 20/18/15 so that the precision-fit spool remains free of abrasive particles. During mounting, six M12 × 60 screws clamp the housing to the manifold, and each fastener must be tightened to 100 Nm to resist separation under full line pressure. Together, these electrical, mechanical, and contamination control provisions ensure dependable cycle-to-cycle performance in automated hydraulic circuits.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
D3 Secondary Pressure
45 bar
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y Internal, Dc)
210 bar
Min Pilot Pressure (3-pos Spring-centered)
13 bar
Mounting Screws
6 x M12 x 60
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-08-08-0-05
Size
NG25
Solenoid Voltage
24 V DC
Spool Symbol
J
Tightening Torque (m12 Screws)
100 Nm
1620 Old Apex Road
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