Butterfly valve is a structurally simple regulating valve that can be used for switch control of low-pressure pipeline media. 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 most suitable for making large-diameter valves. When using butterfly valves for flow control, the most important thing is to choose the correct size and type of butterfly valve so that it can work properly and effectively.

1. Due to the relatively large pressure loss of butterfly valves compared to gate valves and ball valves, they are suitable for pipeline systems with less stringent pressure loss requirements.

2. Since butterfly valves can be used for flow regulation, they are suitable for use in pipelines that require flow regulation.

3. Due to the limitations of the structure and sealing materials of butterfly valves, they are not suitable for use in high-temperature and high-pressure pipeline systems. The general working temperature is below 425 ℃, and the nominal pressure is below PN100.

4. Due to the short length of the butterfly valve structure and its ability to be made into a large diameter, it is advisable to choose a butterfly valve in situations where the structural length is required to be short or for large diameter valves (such as DN1000 and above).

5. Due to the fact that butterfly valves can be opened or closed by only rotating 90 °, it is advisable to choose butterfly valves in areas with fast opening and closing requirements.