Butterfly valves are suitable for flow regulation. Due to the significant pressure loss of butterfly valves in the pipeline, consideration should also be given to the robustness of the butterfly plate to withstand the pressure of the pipeline medium when closed. In addition, it is also necessary to consider the limitations of the working temperature that elastic seat materials can withstand at high temperatures. The structural length and overall height of butterfly valves are small, with fast opening and closing speeds, and good fluid control characteristics. The structural principle of butterfly valves is most suitable for making large-diameter valves. When it is required to use butterfly valves for flow control, the most important thing is to correctly select the size and type of butterfly valves, so that they can work properly and effectively.

Usually, in throttling, regulating control, and mud media, short structural length and fast opening and closing speed (1/4 turn) are required. Low pressure cutoff (low pressure difference), butterfly valve is recommended.

Butterfly valves can be used for dual position regulation, necked channels, low noise, cavitation and gasification phenomena, small leakage into the atmosphere, and abrasive media.

When using butterfly valves under special operating conditions such as throttling adjustment, strict sealing requirements, severe wear, low temperature (deep cold), etc., special designed metal sealing belt adjustment devices with three or two eccentric special butterfly valves are required.

Butterfly valves are suitable for fresh water, sewage, seawater, saline water, steam, natural gas, food, medicine, oil, and various acid-base and other pipelines that require complete sealing, zero gas leakage during gas testing, high service life requirements, and operating temperatures between -10 ° C and 150 ° C.

Soft sealed eccentric butterfly valves are suitable for bidirectional opening and closing and adjustment of ventilation and dust removal pipelines, and are widely used in gas pipelines and waterways in metallurgical, light industry, power, petrochemical systems, etc.

The 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, as a regulating and throttling device.

Metal to metal face sealed triple eccentric butterfly valves are not only used as program control valves for large pressure swing adsorption (PSA) gas separation devices, but also widely used in fields such as petroleum, petrochemical, chemical, metallurgical, and power. They are good substitutes for gate and globe valves.