What is a butterfly valve?

Butterfly valve, also known as flap valve, is a structurally simple regulating valve that can also be used for on/off control of low-pressure pipeline media. In operation, butterfly valve refers to a valve whose closing element (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. It mainly plays a role in cutting off and throttling on pipelines. The opening and closing component of a butterfly valve is a disc-shaped butterfly plate that rotates around its own axis inside the valve body to achieve the purpose of opening, closing, or regulating. The function of a butterfly valve is to control the flow of fluid, mainly for cutting off and throttling in pipelines.The main Butterfly Valve product names of China Butterfly Valve Network include:Manual Soft-sealed Wafer Butterfly Valve,Manual Single Eccentric Wafer Butterfly Valve,Manual Ventilation Butterfly Valve,ManualDesulfurization Wafer Butterfly Valve,Oversized Electric Soft-sealed Flange Butterfly Valve,Pneumatic Metal Hard-sealed Wafer Butterfly Valve,Pneumatic Hard-sealed Flange Butterfly alve,Pneumatic Soft-sealed Wafer Butterfly Valve,Pneumatic Single Eccentric Wafer Butterfly Valve,Pneumatic Soft-sealed Flange Butterfly Valve

Butterfly valves are currently developing the fastest, moving towards high temperature, high pressure, large diameter, high sealing performance, excellent regulating performance, and long service life. They have partially replaced gate valves, globe valves, and ball valves. Butterfly valves, as a component used to achieve on/off and flow control in pipeline systems, have 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.

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