Under what operating conditions are butterfly valves suitable for use?
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2017-03-16
There are many types of butterfly valves, including quick shut-off and continuous adjustment. Mainly used for liquid and gas low-pressure large diameter pipelines. Suitable for situations where pressure loss requirements are not high, flow regulation is required, and fast opening and closing requirements are required; Usually, in situations where the temperature is below 300 ℃ and the pressure is below 40 kilograms (butterfly valves are generally not used with high pressure, and there are few domestic ones that achieve CL600), the medium is generally used for water and gas, and the requirements for the medium are not high. Granular media can also be used.
As a sealed butterfly valve, it was only after the emergence of synthetic rubber that it developed rapidly, making it a new type of shut-off valve. Until the 1980s in China, butterfly valves were mainly used for low-pressure valves, with synthetic rubber seats. By the 1990s, due to increased communication with foreign countries, hard sealed (metal sealed) butterfly valves had developed rapidly. At present, multiple valve factories are able to stably produce medium pressure metal sealed butterfly valves, making the application field of butterfly valves more extensive.
The media that butterfly valves can transport and control include water, condensate, circulating water, sewage, seawater, air, gas, liquid natural gas, dry powder, mud, fruit pulp, and mixtures with suspended solids.
Butterfly valves are suitable for flow regulation. Since the pressure loss of butterfly valve in the pipeline is relatively large, about three times that of gate valve, when selecting butterfly valve, the impact of pressure loss on the Plumbing should be fully considered, and the solidity of butterfly plate bearing pipeline medium pressure when closing should also be considered. In addition, it is also necessary to consider the limitations of the working temperature that elastic seat materials can withstand at high temperatures. The structural length and overall height of butterfly valves are small, with fast opening and closing speeds, and good fluid control characteristics. The structural principle of butterfly valves is suitable for making large-diameter valves. When it is required to use butterfly valves for flow control, it is important to correctly select the size and type of butterfly valves so that they can work properly and effectively.
