(1) What is a butterfly valve?
Butterfly valve, also called flap valve, is a regulating valve with a simple structure that can be used for switching control of low-pressure pipeline media. The butterfly valve refers to the closing part. A valve (disc or butterfly plate) is a disc that rotates around the valve axis to open and close. Valves 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 the role of cutting and throttling on pipelines. The butterfly valve opening and closing part is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. (2) Function of butterfly valve
1. When using butterfly valve under special working conditions such as throttling adjustment, strict sealing, serious wear, low temperature (cryogenic) and other working conditions, it is necessary to use Specially designed triple-eccentric or double-eccentric butterfly valve with metal seal and adjustment device.
2. Metal-to-metal wire sealed double eccentric butterfly valve is suitable for urban heating, gas supply, water supply and other gas, oil, acid and alkali pipelines, etc., as a regulating and throttling device.
3. Butterfly valves are suitable for fresh water, sewage, seawater, salt water, steam, natural gas, etc. that require complete sealing, zero gas test leakage, high life requirements, and operating temperatures between -10 degrees and 150 degrees. Food, medicine, oil and various acid-base and other pipelines.
4. The soft-sealing eccentric butterfly valve is suitable for bidirectional opening, closing and adjustment of ventilation and dust removal pipelines. It is widely used in gas pipelines and waterways in metallurgy, light industry, electric power, and petrochemical systems. In addition to being used as program control valves for large-scale pressure swing adsorption gas separation devices, metal-to-metal surface sealed triple eccentric butterfly valves can also be widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields.