The 4WEH32E50B-6EW220-50NETZ5L Type Electro-Hydraulic Directional Control Valve is a heavy-duty pilot-operated directional valve designed for controlling the direction, start, stop, and switching of hydraulic oil flow in high-flow hydraulic systems. Combining an electrically actuated pilot valve with a hydraulically operated main spool, this valve provides reliable directional control, smooth shifting performance, and exceptional flow capacity for demanding industrial applications. It is widely used in steel plants, hydraulic presses, mining equipment, marine machinery, and large hydraulic power units.

Working Principle

The 4WEH32E50B valve consists of two stages:

Pilot Stage

When the AC220V solenoid is energized, the pilot valve directs control oil pressure to one side of the main spool chamber.

Main Stage

The pilot pressure shifts the large main spool hydraulically, allowing high-volume oil flow between ports P, A, B, and T.

Return Function

When the solenoid is de-energized, the pilot valve returns to its neutral position, and the main spool is automatically centered by spring force.

This electro-hydraulic design allows small electrical signals to control extremely large hydraulic flows while maintaining smooth and reliable operation.

Product Features

• Electro-hydraulic pilot-operated control
• 4-way, 3-position directional valve
• High flow capacity up to 1100 L/min
• Stable spool shifting with low hydraulic shock
• Suitable for high-pressure industrial systems
• Pilot-operated design reduces solenoid load
• Available with manual override
• Internal or external pilot oil supply options
• Long service life and low maintenance
• Suitable for continuous-duty operation