| 摘要 |
PURPOSE:To enable employment for high temperature fluid by providing a convex on the valve seat face of lining material composed of metal plate for covering the valve body while surrounding the valve shaft and providing a heat-resistant resilient member in the convex. CONSTITUTION:A convex 16 is provided on a lining material 13 while surrounding the valve shaft 11 where the top of said convex 16 exists entirely on a spherical face having same center with the spherical outercircumference of valve board 10 and the diameter is reduced by the amount collapased by a resilient member 18. When pushing the valve board 10 into a valve body 14 applied with lining material 13 through the resilient member 18, the convex section 16 will tend to collapse but reaction of resilient member 18 is applied onto the lining material 13 to seal the outercircumference of valve board 10 and the top of convex 16 entirely. |
