OmniSafe Flight Qualification

* taken at the point indicated by the red arrow on the first S.E.M.s After checking the nickel peaks on the bottom EDS we notice much higher nickel reading. This higher signal is from nickel particles that are embedded into the torroid of the gland from the galled nickel gasket during tightening of the fitting….

In the S.E.M. (top) the severe effects from over tightening on the sealing surfaces of a legacy face seal fitting are shown. In the S.E.M. (lower) using Omnisafe torque elimination, the seal area is not galled. One half turn past finger tight is a worst case scenario. At 5/8 turn past finger tight the gasket…

Multi Mate-Demate Record This report details a Multi mate/demate field study at Lawrence Livermore National Laboratory.  Over six years in service, this fitting was mate/demated 1557 times and was still working effectively when decommissioned. This evaluation shows the direct cost savings by avoiding the replacement of fittings that no longer passed leak check in this…

This is the cross sectional view of the Omnisafe fitting at finger tight (click to enlarge). The gap between the torque eliminators is the same as the gasket thickness (.028”). If the gasket is missing, the torque eliminators bottom out into a “fail safe” mode. This prevents torroid to torroid contact and destruction. The fitting…

How much rotation is transferred to the components connected by a “VCR type”* metal face seal fitting as it is tightened with a nickel gasket? This data below shows that the relative rotation of the components ranges from 6.7 to 18.2 degrees. This rotation is based on the plating inside the female nut and the…