| 摘要 |
PURPOSE: A noise blocking cover for a bolt valve is provided to prevent leakage of fluid by blocking noise of fluid in a fluid cut-off process. CONSTITUTION: A noise blocking cover for a bolt valve comprises a flange(230), a fitting part(210), and a fixing part. The flange is formed the outer circumference of the noise blocking cover. The fitting part includes a curvature portion(211) and an opening(215) and is inserted in a sheet(40). The curvature portion contacts the exterior face of a ball(20). The fixing part is projected to the other side of a flange and is inserted in a flow path(13) with connected to an opening.
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