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The diameter of a disc is the same as the outer diameter of the pipe We can infer that the valve is opened or closed by rotating the spindle A butterfly valve comprises a disc and a ring body The profile of the butterfly valve is a ring body
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The profile of the valve is like a globe The valve seat is set into the bulbous body The plug or disc of the valve is made vertical to the axis of the pipe The valve seat is located at right side of the plug or disc
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