Abstract: A non-rotational fitting assembly (10; 110; 210) is provided to prevent torsional forces of a nut (12, 112; 212) from being transmitted to a sealing face (16; 26; 246) of a fitting component (12; 22; 248). The assembly (10; 110; 210) includes at least one fitting component (22; 248) having a bearing face (28; 246) aligned orthogonal to the axis of the fitting component (22; 248). The assembly (10; 110; 210) also includes a nut (12; 112; 212) having a bearing face (36; 118) aligned orthogonal to the threads of the nut (26; 112; 212) and dimensioned for engagement with the bearing face (28; 246) of the fitting component (12; 22; 248).

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.

Abstract: A high pressure fluid fitting is provided for repeated connection and disconnection. The fitting includes a threaded nipple and a flanged nipple configured for abutting end-to-end mating with one another. A thrust bearing formed from a metal harder than the flanged nipple is positioned adjacent the flange and on the side thereof opposite the mating face of the flanged nipple. A coupling nut with an inwardly extending annular flange is disposed over the flanged nipple and is threadedly engageable with the threaded nipple. The flange of the coupling nut moves against the thrust bearing and urges the nipples into tight sealing engagement. The smoothness and hardness and chemical dissimilarity of the thrust bearing avoid galling and other friction related damage to the fitting, and hence lead to an extended life for the fitting.

Abstract: A rotatable regenerator of toroidal configuration is frictionally driven by a single roller disposed internally of the toroid.