Butterfly valves are suitable for regulating and intercepting the flow of medium in the pipelines of various corrosive and non-corrosive fluid media in the engineering systems of furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation and environmental protection.

Butterfly valve is suitable for flow regulation. Since the pressure loss of butterfly valve in the pipeline is relatively large, about three times that of the gate valve, therefore, when selecting the butterfly valve, full consideration should be given to the pipeline system affected by the pressure loss, and the sturdiness of the butterfly plate to withstand the pressure of the pipeline medium when it is closed should also be considered. In addition, it is also necessary to consider the limits of the working temperature of the resilient valve seat material under high temperature.

When its under special working conditions such as throttling adjustment, or requiring strict sealing, or severe wear, or low temperature (cryogenic), it is necessary to use specially designed metal sealed triple or double eccentric butterfly valves with regulating devices.

Concentric butterfly valves are suitable for pipelines that require complete sealing, zero leakage in gas test, high life expectancy and working temperature from -10 to 150℃ for fresh water, sewage, seawater, salt water, steam, natural gas, food, medicine, oil and various acid and alkali and others

Soft seal eccentric butterfly valves are suitable for bi-directional opening and closing and adjustment of pipeline for ventilation and dust removal. Soft seal eccentric butterfly valves are widely used in metallurgy, light industry, electric power, petrochemical system of gas pipeline and waterway, etc.

Metal-to-metal line sealed double eccentric butterfly valves are suitable for urban heating, steam supply, water supply and gas, oil, acid and alkali pipelines, as a regulating and intercepting device.