The existing advanced pneumatic butterfly valve is a three eccentric metal hard seal pneumatic butterfly valve. The valve body and valve seat are integral components, and the sealing surface of the valve seat is welded with heat-resistant and corrosion-resistant alloy materials. This pneumatic butterfly valve is more resistant to high temperature than the general pneumatic butterfly valve.

The flow coefficient adjustment butterfly valve of the analysis and regulation butterfly valve is also called the ventilation butterfly valve, which belongs to a kind of butterfly valve. It is mainly used for gas pipeline systems in metallurgy, mining, cement, chemical industry and power generation industries as flow regulating equipment. The valve is mainly composed of valve body, valve disc and driving device. Its basic principle is that the drive device drives the valve plate to open at any angle between 0~90 °, so as to control the flow of medium in the pipeline when flowing through the valve body