Since the pressure loss of butterfly valves in the pipeline is relatively large, when selecting butterfly valves, the impact of pressure loss on the pipeline system should be fully considered, and the tighness of the butterfly plate under the pressure of the pipeline medium should also be considered when the butterfly valve is closed. In addition, the operating temperature limit of the elastic valve seat material at high temperatures must also be considered.
The structure length and overall height of the butterfly valve are small, the switching speed is fast, and the fluid control characteristic is good. The structural principle of the butterfly valve is suitable for manufacturing large diameter valves. When butterfly valves are required for flow control, it is important to correctly select the size and type of butterfly valves so that they can work normally and effectively. Generally speaking, throttling, regulating control and mud medium require short structure length and fast switching speed (1/4 turn). For low pressure cut-off (small pressure difference), butterfly valve is recommended.
Butterfly valve can be used for dual-position adjustment, necking channel, low noise, cavitation and gasification phenomenon, a small amount of atmospheric leakage and grinding media.
For the two butterfly valves used under special conditions such as throttling adjustment, strict sealing requirements, severe wear, low temperature (low temperature), etc., a specially designed triple-eccentric or double-eccentric butterfly valve with a metal seal adjustment device should be used.
The centerline butterfly valve is suitable for fresh water, sewage, sea water, salt water, steam, natural gas, food, medicine, petroleum, various acids and alkalis, etc. It needs to be completely sealed, without gas test leakage, long service life, and working temperature -10 ℃~150℃ pipeline.
Soft sealing eccentric butterfly valve is suitable for two-way opening and closing and adjustment of ventilation and dust removal pipelines. It is widely used in gas pipelines and waterways in metallurgy, light industry, electric power, and petrochemical systems. Stainless steel butterfly valve
Double eccentric butterfly valve and triple eccentric butterfly valve are suitable for urban heating, gas, water supply and other gas, petroleum, acid and alkali pipelines.
