NASA NTRS · 19860000460
Sealing a Loosely Fitting Valve Assembly
Abstract
Double-ring seal avoids expense of remachining or redesigning valve parts. Mating fittings on valve sealed by pair of rings - one O-ring and backup ring. Backup ring fills relatively large gap between parts. Prevents softer O-ring from being pushed into and through gap.
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Goff, L., Tellier, G.. 1986-09-01. Sealing a Loosely Fitting Valve Assembly. https://ntrs.nasa.gov/citations/19860000460
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