Butterfly valve is a simple control valve, which mainly functions to cut off the flow of the medium in the pipeline or adjust the flow of the medium in the pipeline. 

 The application of butterfly valve has many advantages. 

 1. Excellent sealing performance: butterfly valve, especially soft sealing butterfly valve, the key component is the sealing ring made of soft sealing material. When the butterfly plate rotates, the sealing ring is closely attached to the valve seat, which can achieve a good sealing effect and ensure that the system maintains stable sealing performance during long-term operation. 

 2. Good adjustment performance: The butterfly valve has a large circulation capacity and a small flow resistance coefficient, which can achieve good flow adjustment performance. In the air pipeline system, this can meet the system's precise control needs for flow. 

 3. Simple structure and light weight: The structure of the butterfly valve is relatively simple and the weight is relatively light, which makes it more convenient in installation and maintenance. 

 4. Flexible operation: The butterfly valve opens and closes quickly, which can quickly open or close the air flow in the pipeline, which is very suitable for scenarios where the air flow needs to be quickly adjusted. 

 When choosing a butterfly valve suitable for air pipes, the following factors need to be considered: 

 1. Pipe diameter: Select the appropriate butterfly valve specifications according to the diameter of the air pipeline to ensure that the valve can fully cover the cross-section of the pipeline and achieve a good sealing effect. 

 2. Working pressure: Select the appropriate butterfly valve material and sealing material according to the working pressure of the pipeline system to ensure that the valve can maintain stable and reliable operation in a high-pressure environment. 

 3. Fluid characteristics: Considering the temperature, humidity and other factors of the fluid in the air pipeline, choose the butterfly valve material and sealing material with corresponding tolerance. 

 4. Installation space: choose the appropriate butterfly valve structure according to the actual installation space, such as vertical, horizontal, etc., to meet the installation needs. 

 To sum up, the butterfly valve can be used in the air pipeline, and the butterfly valve has a wide application prospect in the air pipeline system. When selecting and using the butterfly valve, it is necessary to consider comprehensively according to specific application scenarios and requirements to ensure that the valve can play the best performance.