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V-ball valve is a kind of rotary cutting method with V-notch in the ball core. It can be used with valve positioner to realize proportional adjustment. It is widely used in petroleum, chemical industry, papermaking, metallurgy, water treatment and other industrial departments to adjust or cut off the medium in the pipeline. It has a large flow coefficient and a valve seat with an energizing ring, which can adjust the sealing force and ensure sealing.