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Butterfly valve, also known as flap valve, is a simple structure of the valve, but also can be used for low pressure pipe medium switching control valve work. But what are the applicable occasions for butterfly valves? I am afraid not everyone understands them. Let's get to know them together!
1. The butterfly valve is suitable for flow regulation. Because the pressure loss of the butterfly valve in the pipeline is relatively large, the robustness of the butterfly plate to withstand the medium pressure of the pipeline should also be considered. In addition, it is also necessary to consider the limitation of the operating temperature of the elastic seat material 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.
2. Generally, in the throttling, regulating control and mud 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.
3, in the two-position adjustment, necking channels, low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, with abrasive media, you can use the butterfly valve.
4. 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 seal with the adjustment device must be used for three eccentricity or double eccentricity. Special butterfly valve.
5. The midline butterfly valve is suitable for fresh water, sewage, seawater, salt water, steam, natural gas, food, medicine, and oil products that require complete sealing, zero gas test leakage, high life expectancy, and working temperature of -10 degrees to 150 degrees. And a variety of acid-base and other pipelines.
6. The 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.
7, metal to wire seal double eccentric butterfly valve is suitable for urban heating, gas supply, water and other gas, oil, acid and alkali pipelines, as a regulating and throttling device.
8. The metal-to-metal face seal triple eccentric butterfly valve is not only used as a large 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 A good alternative product.