304 two-piece ball valve in the pipeline is mainly used to cut off, distribution and change the flow direction of the medium. Ball valve is currently widely used as a new type of valve, it has the following advantages:
1. Fluid resistance is small, and its resistance coefficient is equal to the pipe segment of the same length.
2. Simple structure, small volume, light weight.
3. Close and reliable, the sealing surface material of the current ball valve is widely used plastic, good tightness, and has been widely used in the vacuum system.
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