Turbine butterfly valve, as a component used to achieve on/off and flow control of pipeline systems, has been widely used in many fields such as petroleum, chemical, metallurgy, hydropower, etc. In the known butterfly valve technology, the sealing form often adopts a sealing structure, and the sealing material is rubber, polytetrafluoroethylene, etc. Due to structural limitations, it is not suitable for industries that are resistant to high temperatures, high pressures, corrosion, and wear. A relatively advanced butterfly valve is the three eccentric metal hard seal butterfly valve, where the valve body and valve seat are connected components, and the sealing surface layer of the valve seat is welded with heat-resistant and corrosion-resistant alloy materials. The multi-layer soft stacked sealing ring is fixed on the valve plate. Compared with traditional butterfly valves, this butterfly valve has the advantages of high temperature resistance, easy operation, frictionless opening and closing, and compensating for sealing with the increase of torque of the transmission mechanism when closing, which improves the sealing performance and extends the service life of the butterfly valve.

Advantages of turbine butterfly valve:
1. Easy and quick opening and closing, labor-saving, low fluid resistance, and can be operated frequently.
2. Simple structure, small size, and light weight.
3. It can transport mud with minimal liquid accumulation at the pipeline outlet.
4. Under low pressure, good sealing can be achieved.
5. Good regulation performance.

The turbine butterfly valve is also suitable for a high pressure range, with a large nominal diameter. The valve body is made of carbon steel, and the sealing ring of the valve plate uses a metal ring instead of a rubber ring. Large high-temperature butterfly valves are manufactured by welding steel plates and are mainly used for flue gas ducts and gas pipelines for high-temperature media.