The butterfly valve is suitable for flow regulation. Due to the significant pressure loss of the butterfly valve in the pipeline, the strength of the butterfly plate when it is closed and withstands the pressure of the pipeline medium should also be considered. In addition, the limit of the working temperature that the elastic valve seat material can withstand at high temperatures must also be taken into account. The structural length and overall height of the butterfly valve are relatively small, it opens and closes quickly, and has good fluid control characteristics. The structural principle of the butterfly valve is most suitable for manufacturing large-diameter valves. When the butterfly valve is required to be used for controlling flow, the most important thing is to correctly select the size and type of the butterfly valve so that it can work appropriately and effectively.
Usually, in throttling, regulating control and in the mud medium, it is required that the structure length be short and the opening and closing speed be fast (1/4 turn). For low-pressure cutoff (with small pressure difference), a butterfly valve is recommended.
When dealing with two-position regulation, constricted channels, low noise, cavitation and vaporization phenomena, slight leakage into the atmosphere, and abrasive media, butterfly valves can be selected.
When using a butterfly valve under special operating conditions such as throttling regulation, strict sealing requirements, severe wear, low temperature (cryogenic) and other conditions, a special-designed metal sealing ring with a regulating device for three eccentricity or double eccentricity dedicated butterfly valve should be used.
The butterfly valve is suitable for applications where complete sealing is required, zero leakage during gas testing is necessary, longer service life is demanded, and the working temperature ranges from -10 degrees to 150 degrees. It is used in freshwater, sewage, seawater, salt water, steam, natural gas, food, medicine, oil products, various acids, bases and other pipelines.
Soft-sealed eccentric butterfly valve is suitable for the bidirectional opening and closing as well as regulation of ventilation and dust removal pipelines. It is widely used in gas pipelines and water channels of metallurgy, light industry, power, and petrochemical systems.
The metal-to-metal wire-sealed double eccentric butterfly valve is suitable for various pipelines such as urban heating, gas supply, water supply, etc., for gases, oils, acids, alkalis, etc. It is used as a regulating and throttling device.
The metal-to-metal face-sealed three eccentric butterfly valve can not only be used as a program control valve for large-scale pressure swing adsorption (PSA) gas separation devices, but is also widely applied in fields such as petroleum, petrochemicals, chemicals, metallurgy, and power. It is a good alternative product to gate valves and globe valves.
