Bosch Rexroth | H-4WEH25G6X6EW110N9DAL
H-4WEH25G6X/6EW110N9DAL
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The H-4WEH25G6X/6EW110N9DAL directional spool valve is produced by Bosch Rexroth for hydraulic automation tasks that need precise flow switching. The valve uses a 4-way configuration to alternate pressure and return lines on NG25 ports, enabling bidirectional control of cylinders and motors. Its spool is identified by symbol G, allowing a maximum flow of 400 l/min while maintaining full stroke stability. Working pressure on ports P, A, and B can reach 350 bar, and the tank port is limited to 250 bar to protect return plumbing. A 110 V AC pilot coil shifts the spool electrically, and a concealed N9 manual override permits local actuation during setup or power loss.
Component series 6X defines internal clearances and envelope dimensions and pairs with the ISO 4401-08-08-0-05 porting pattern for consistent manifold layouts. Subplate mounting, fastened by six M12 × 60 screws, keeps the body aligned and lets the unit be removed without disturbing fixed pipework. This assembly withstands a pilot return pressure of 160 bar on port y or Ac, preventing leakage under back-pressure conditions. Hydraulic fluid must meet ISO 4406 20/18/15 cleanliness to avoid spool wear, and the functional safety metric MTTFd is 100 years, allowing the valve to be included in high-performance level circuits. These attributes round out the hydraulic and mechanical profile of the valve.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Component Series
6X
Manual Override Type
Concealed (N9)
Max Flow (symbol G)
400 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Operating Pressure (t)
250 bar
Max Pilot Return Pressure (y, Ac)
160 bar
Mounting Screws
M12 x 60 (6 pcs)
Mounting Type
Subplate
Mttfd
100 Years
Pilot Coil Voltage
110 V AC
Porting Pattern
ISO 4401-08-08-0-05
Size
NG25
Spool Symbol
G
Valve Configuration
4-Way
1620 Old Apex Road
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