High purity gas fitting with grooved gasket
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United States of America Patent
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-
Mar 30, 1999
Grant Date -
N/A
app pub date -
Apr 21, 1997
filing date -
Apr 21, 1997
priority date (Note) -
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Abstract
A fitting is provided for a high purity gas system. The fitting includes first and second components having fluid passageways extending therethrough. Each of the first and second components includes a sealing face having a toroidally generated sealing bead extending unitarily thereabout. At least one nut is provided for urging the sealing faces toward one another. A metallic gasket is disposed between the respective sealing faces. The gasket includes opposed surfaces having annular grooves formed therein. The grooves are dimensioned such that a radially inner circumferentially extending surface on each groove engages a radially inner circumferentially extending surface on a respective toroidal sealing bead. As a result, dead spaces between the fitting and the gasket are eliminated. Additionally, any debris generated as the toroidal sealing beads slide over the gasket are urged outwardly and away from the fluid passages.
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