Bosch Rexroth | H-4WEH25E6X6EG24K4QM0G24
H-4WEH25E6X/6EG24K4QM0G24
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The H-4WEH25E6X/6EG24K4QM0G24 valve is part of the WEH Directional Spool Valves series manufactured by Bosch Rexroth for hydraulic automation where precise flow routing is required. It uses nominal size 25 ports to accommodate medium-to-high flow circuits, and its E three-position spool provides two working positions with a spring-centered neutral. The rest position is monitored under code QM0G24 so controllers can verify that the spool has returned before restarting motion. Pilot control is handled by a high-power 6E pilot valve energized at 24 V DC, allowing fast shifting under load. Electrical connection is made through a DIN EN 175301-803 (K4) plug, simplifying field wiring. Pilot oil is supplied externally through channel X and returned externally through channel Y, keeping pilot flow isolated from the main gallery. A minimum pilot pressure of 13 bar is necessary to overcome the centering springs and move the spool.
Main ports P, A, and B tolerate operating pressures up to 350 bar, while port T is limited to 250 bar and the external port Y is rated for 210 bar, letting system designers assign safe tank and drain lines. The valve passes up to 650 l/min at 350 bar, matching high-capacity pumps in industrial presses or marine power units. Pilot circuits can be charged to a maximum of 250 bar without damaging the 6E stage. Mounting follows the ISO 4401 porting pattern so the unit fits standard subplates, and a 100 µm surface coating resists corrosion in humid plant environments.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Max Operating Pressure (p, A, B)
350 bar
Max Operating Pressure (t)
250 bar
Max Operating Pressure (y, External)
210 bar
Maximum Flow (350 Bar)
650 l/min
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (spring-centered)
13 bar
Nominal Size (ng)
25
Pilot Oil Return
Y External
Pilot Oil Supply
X External
Pilot Valve Type
6E High-Power
Pilot Valve Voltage
24 V DC
Porting Pattern
ISO 4401
Spool Position Monitoring
Monitored Rest Position (QM0G24)
Spool Type
E (3-Position)
Surface Coating Thickness
100 µm
1620 Old Apex Road
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