| 摘要 |
PURPOSE: A variable disc-shaped butterfly valve is provided to maintain strong sealing and prevent interference with a disc and a sealing member while opening passage. CONSTITUTION: A variable disc-type butterfly valve includes a main body(110), a first disk(121), a second disk(122), a first sealing member(141), a second sealing member(142), and a disk controller(200). The main body has an internal space of which both ends are opened. The first disc and the second disc are arranged to be faced each other in the internal space and rotatably installed between a state where the internal space is opened and a state where the internal space is closed. The first sealing member and the second sealing member are mounted on the main body and respectively contacted with the first and the second disc in the state where the internal space is closed. The disc controller moves the first and the second disc toward a direction of being closed to the first and the second sealing member or an opposite direction in the state where the internal space is closed. |
