What is a butterfly valve? What is the function of butterfly valve?

(1) What is a butterfly valve? It is also called flap valve. It is a kind of regulating valve with simple structure. Butterfly valve, which can be used to control the opening and closing of low-pressure pipeline medium, refers to a valve whose closing part (disc or butterfly plate) is a disc and rotates around the valve shaft to realize opening and closing. Valves can be used to control the flow of various fluids, such as air, water, steam, corrosive media, mud, oil, liquid metal and radioactive media. It mainly cuts off and throttles the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting.

(2) The function of butterfly valve is 1. When using butterfly valves under special working conditions, or under working conditions such as strict sealing requirements, serious wear and tear, low temperature (cryogenic), special butterfly valves with specially designed metal sealing and adjusting devices must be used.

2. Metal-to-metal wire sealing double eccentric butterfly valve is suitable for urban heating, gas supply, water supply and other gas, oil, acid and alkali pipelines as regulating and throttling devices.

3. Butterfly valves are suitable for pipelines with fresh water, sewage, seawater, salt water, steam, natural gas, food, medicines, oil products, various acids and alkalis, which require complete sealing, zero leakage during gas testing, long service life and working temperature of-10℃ ~ 150℃.

4. Soft sealing eccentric butterfly valve is suitable for bidirectional opening and closing and adjustment of ventilation and dust removal pipelines, and is widely used in gas pipelines and waterways of metallurgical, light industry, electric power and petrochemical systems. Metal-to-metal triple eccentric butterfly valve can be widely used in petroleum, petrochemical, chemical, metallurgical, electric power and other fields besides being used as the program control valve of large-scale pressure swing adsorption gas separation device.