At present, the use of pneumatic ball valve is mainly a device for cutting off, distributing and changing the flow direction of medium in advance in the pipeline. The reason why it is popular in the market is that it has the following advantages: (1) It is easy to operate and has a fast opening and closing speed. From full closing to full opening, it only needs to rotate 90 degrees to complete, and it can also carry out remote control; (2) The fluid resistance is not large, in fact, its resistance is equal to that of pipe sections of the same length; (3) The sealing surface of pneumatic switch ball valve supplied by Yuexi is made of materials with good sealing performance, which are widely used in vacuum system; 　　

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