The pneumatic ball valve is a ball, which can be opened and closed by rotating the ball 90 ° around the axis of the valve stem. The pneumatic ball valve is mainly used to cut off, distribute and change the flow direction of the medium on the pipeline. The pneumatic ball valve designed as a V-shaped opening also has a good flow regulation function. The pneumatic butterfly valve is different from the pneumatic ball valve. It is a kind of valve that uses the disc type hoist to rotate about 90 ° to open, close and regulate the fluid channel.

Butterfly valve 1. It can be opened and closed quickly, labor-saving, low fluid resistance, and can be operated frequently. 2. Simple structure, small size and light weight. 3. The slurry can be transported, and the liquid accumulated at the pipe mouth is small. 4. Good sealing can be achieved under low pressure. 5. Good adjustment performance.