| 摘要 |
PURPOSE: A disk sealing control device for a butterfly valve is provided to conveniently prevent water leakage using adjustable bolts without disassembling whole butterfly valve. CONSTITUTION: A disk sealing control device for a butterfly valve comprises an auxiliary rotary shaft(500), an adjustable member(450), first fastening screws(460), and a space part. The auxiliary rotary shaft rotates a disk(200). The adjustable member is fixed on the auxiliary rotary shaft. The first fastening screws connect the adjustable member. The space part is formed between the adjustable member and an intermediate cover(440). The intermediate cover is connected to an upper cover(430). An adjustable bolt(420) is inserted through the adjustable member and the intermediate cover. The upper cover is formed in the end of the adjustable bolt.
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