Butterfly valve is suitable for flow regulation, usually in the throttling, regulation control and mud medium, requires a short length of structure, fast opening and closing speed. In the two - position regulation, shrink - mouth channel, low noise, with abrasive medium, can choose the butterfly valve.
The middle line butterfly valve is suitable to meet the requirements of complete sealing, zero leakage of gas test, high life requirements, working temperature in -10-150 degrees Celsius of fresh water, sea water, sewage, salt water, steam, natural gas, food, medicine, oil and various acid and alkali and other pipelines. Soft seal butterfly valve is widely used in metallurgy, light industry, electric power, petrochemical system gas pipeline and waterway etc.
Hard sealing double eccentric butterfly valve is illegally suitable for urban heating, gas supply, water supply, gas, oil, acid and alkali pipelines, as a regulation and closure device.