Butterfly valve is suitable for flow regulation. Because the pressure loss of the butterfly valve in the pipeline is relatively large, about three times that of the gate valve, when selecting the butterfly valve, the pressure loss of the pipeline system should be fully considered, and the disc plate should be considered to withstand the medium pressure of the pipeline when closed. Sex. In addition, it is also necessary to consider the limitation of the working temperature that the elastic seat material can withstand at high temperatures. The butterfly valve has a small structural length and overall height, fast opening and closing speeds, and good fluid control characteristics. The structural principle of the butterfly valve is most suitable for making large-diameter valves. When a butterfly valve is required to control the flow, the most important thing is to correctly select the size and type of the butterfly valve so that it can work properly and effectively.
In general, in the throttling, regulating control and slurry media, the required structure length is short, and the opening and closing speed is fast (1/4 turn). Low pressure cut-off (small pressure difference), butterfly valve is recommended. In the double-position adjustment, necking channel, low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, with abrasive media, you can use the butterfly valve.
When the butterfly valve is used for throttling under special working conditions, or when strict sealing is required, or when the wear is severe and the temperature is low (cryogenic), special design of the metal sealing tape adjusting device is required for the three eccentric or double eccentric special purpose. Butterfly valve.
The midline butterfly valve is suitable for fresh water, sewage, seawater, salt water, steam, natural gas, food, medicine, oil products, etc. that require complete sealing, zero gas test leakage, high life expectancy, working temperature of -10 degrees to 150 degrees. Acid and alkali and other pipelines.
Soft seal eccentric butterfly valve is suitable for bidirectional opening, closing and adjustment of ventilation and dust removal pipelines. It is widely used in gas pipelines and waterways of metallurgy, light industry, electric power, and petrochemical systems.
Metal to metal wire seal 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.
The metal-to-metal face seal triple eccentric butterfly valve is not only used as a large-scale pressure swing adsorption (PSA) gas separation device program control valve, but also can be widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields, when the gate valve, globe valve is good replacement product.
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