Structural principle of pneumatic ball valve（1）

Structural Principle

Pneumatic ball valve is composed of valve body, ball, valve stem, sealing ring, pneumatic actuator, etc. When the pneumatic actuator receives a control signal, the air pressure inside the pneumatic actuator rotates the ball to the corresponding position, thereby achieving valve opening and closing control. Inside the pneumatic actuator, the air source enters the cylinder through the trachea, pushing the piston to move and thereby driving the valve stem to rotate the ball. When the gas supply stops, the gas in the cylinder is discharged, the valve stem and ball return to their original position, and the valve closes. The sealing ring of the pneumatic ball valve plays a sealing role to prevent medium leakage. When the valve is closed, the sealing ring is compressed to form a seal and prevent medium leakage. When the valve is opened, the sealing ring is stretched and will not affect the opening of the valve.

 

Working Principle

The working principle of pneumatic ball valve is mainly to use compressed air to drive the switch of the ball valve. Specifically, when compressed air enters the pneumatic actuator, the cylinder inside the actuator is subjected to the action of air pressure, causing the piston to move forward or backward. This movement drives the valve stem by rotating or lifting the torsion shaft, thereby driving the ball of the ball valve to rotate.