Pneumatic ball valve is a common control valve, its main function is to control the flow of liquid or gas in pipelines.

It usually consists of a ball, a valve seat and an operating mechanism. 

The ball rotates to open or close the pipe, and the seat provides a seal to ensure that liquid or gas does not leak.

Compared with manual ball valves, pneumatic ball valves have a higher degree of automation and reliability. 

They can be opened and closed controlled by air pressure or pneumatic signals, greatly reducing the need for operator involvement. 

This means that pneumatic ball valves can be widely used in industrial automation systems, 

such as in chemical plants, petroleum industry, food processing and other fields.