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How to choose the right size and type of center line butterfly valve

Asked by freemexy on 05/15/2019 at 1:38 AM


How to choose the right size and type of center line butterfly valve
Generally, in the throttling, regulating control and mud medium, the structure length is short, the opening and closing speed is fast (1/4 turn). Low pressure cut-off (small pressure difference), it is recommended to choose butterfly valve.
In the two-position regulation, shrink mouth to channel, low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, with abrasive medium, can choose the butterfly valve. In special working conditions, throttle regulation, or strict sealing requirements, or severe wear, low temperature (cryogenic) and other working conditions when using the butterfly valve, it is necessary to use a special design of metal seal belt adjustment device, three eccentric or double eccentric special butterfly valve.
The middle line butterfly valve is suitable for the fresh water, sewage, sea water, brine, steam, natural gas, food, medicine, oil and various acid and alkali and other pipelines with requirements of complete sealing, zero leakage of gas test, high service life and working temperature between -10 c and 150 c.
Soft seal eccentric butterfly valve is suitable for bidirectional opening and closing and adjustment of ventilation and dust removal pipeline, widely used in metallurgy, light industry, electric power, petrochemical system gas pipelines and waterways.
Metal to metal line sealing double eccentric butterfly valve is suitable for city heating, gas supply, water supply and other gas, oil, acid and alkali pipeline, as a regulation and throttling device.
Metal-to-metal sealing tri-eccentric butterfly valve can be widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields besides being used as the program control valve of PSA gas separation device. It is a good substitute for gate valve and globe valve.

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