Proper use of butterfly valve

Butterfly valve for flow regulation. Because the butterfly valve in the pipeline pressure loss is relatively large, about three times the gate valve, so in the selection of butterfly valve, should fully consider the pipeline system by pressure loss, should also consider the closure of the butterfly plate under the pressure of the pipeline medium. In addition, the operating temperature limits of resilient seat materials at high temperatures must be considered.

Butterfly valve structure length and overall height is small, open and close fast, and has good fluid control characteristics, butterfly valve structure principle is most suitable for the production of large diameter valves. When butterfly valve is required to control flow, the most important thing is to correctly choose the size and type of butterfly valve, so that it can work properly and effectively.

In general, in throttling, regulating control and mud media, short construction length and fast opening and closing speed (1/4 revolution) are required. Low pressure cut-off (small pressure difference), butterfly valve is recommended.

Butterfly valve can be used in double adjustment, narrow mouth channel, low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, with abrasive medium.

Throttling adjustment under special working conditions, or strict sealing requirements, or wear serious, low temperature (cryogenic) and other working conditions under the use of butterfly valve, need to use a special design of metal seal with adjusting device to three eccentric or double eccentric special butterfly valve.

Midline butterfly valve is suitable for the requirements of complete sealing, gas test leakage is zero, high life requirements, working temperature in -10℃ ~ 150℃ fresh water, sewage, sea water, salt water, steam, natural gas, food, medicine, oil and all kinds of acid and alkali and other pipelines.

Soft seal eccentric butterfly valve is suitable for two-way opening and closing and adjustment of ventilation and dust removal pipeline, widely used in metallurgy, light industry, electric power, petrochemical system of gas pipelines and waterways.

Metal to metal wire sealing double eccentric butterfly valve is suitable for city heating, gas supply, water supply and other gas, oil, acid and alkali pipeline, as the regulation and throttling device.

Metal to metal surface sealing three eccentric butterfly valve in addition to as a large pressure swing adsorption (PSA) gas separation device program control valve, but also widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields, is a gate valve, globe valve good alternative products.