| 摘要 |
PURPOSE: A butterfly valve is provided to control a sealing degree between a sealing unit and a body by pressurizing a ring member module with a pressurizing unit. CONSTITUTION: A butterfly valve comprises a body(100), a disk unit, and a sealing unit(300). The body comprises an internal space of which both ends are opened. The disk unit is rotatably installed in the internal space to selectively open and close the internal space according to rotation. The sealing unit is arranged between the outer circumference of the disk unit and the inner circumference of the body to seal between the disk unit and the body. The sealing unit comprises a main body(310), a ring member module(340), and a pressurizing unit(350).
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