| 摘要 |
<p>A wafer type butterfly valve is disclosed for locating between two conduit flanges. The valve has a plurality of threaded mounting holes extending between the mounting surfaces and positioned on a circle outside the central bore adapted for lug bolts connecting the valve body to each of the two conduit flanges to withstand conduit pressure between the valve and each flange. A plurality of gaps are also supplied in the valve body located on the circle between the holes adapted for long bolts connecting the two conduit flanges together and transferring some bending stress directly from flange to flange omitting the valve body. Thus the valve withstands pressure when attached to either flange but does not take bending forces between the flanges. Bending forces are transferred directly from flange to flange.</p> |
