The 4WEH16E50B-6EG24NETZ5L Type Electro-Hydraulic Directional Control Valve is a high-performance electro-hydraulic directional spool valve designed for controlling the start, stop, and flow direction of hydraulic oil in medium and large hydraulic systems. The valve combines an electrically operated pilot valve with a hydraulically actuated main spool, enabling reliable switching of high-flow and high-pressure hydraulic circuits. It is widely used in steel plants, hydraulic presses, injection molding machines, construction machinery, mining equipment, and industrial automation systems.

The 4WEH16E50B valve consists of a pilot solenoid valve and a hydraulically actuated main directional spool.

When the solenoid coil is energized, the pilot valve directs pilot pressure oil to one side of the main spool chamber. The hydraulic pressure then shifts the main spool to the required position, allowing hydraulic oil to flow between ports P, A, B, and T.

When the solenoid is de-energized, the pilot pressure is released and the spool returns to its center position through spring force.

Compared with direct-operated directional valves, the electro-hydraulic pilot-operated structure allows:

• Larger flow capacity
• Lower operating force
• More stable switching
• Reduced solenoid load
• Improved reliability in heavy-duty applications

The WEH series utilizes a pilot control stage to hydraulically move the main spool, enabling electrical control of large hydraulic flows.

Product Features

• Electro-hydraulic pilot operated directional control
• Suitable for large flow hydraulic systems
• High pressure and high flow capacity
• Stable switching performance with low impact
• Fast response and reliable operation
• Modular ISO standard mounting design
• Low pressure loss and high efficiency
• Optional manual override function
• Long service life and low maintenance cost