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Caps Seal Boltholes On Vacuum-System FlangesSealing caps devised for boltholes on vacuum-system flanges. Used in place of leak-prone gaskets, and provide solid metal-to-metal interfaces. Each sealing cap contains square-cut circular groove in which O-ring placed. Mounted on studs protruding into access ports, providing positive seal around each bolthole. Each cap mates directly with surface of flange, in solid metal-to-metal fit, with O-ring completely captured in groove. Assembly immune to misalignment, leakage caused by vibration, and creeping distortion caused by weight of port. O-ring material chosen for resistance to high temperature; with appropriate choice of material, temperature raised to as much as 315 degrees C.
Document ID
19930000673
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Roman, Robert F.
(NASA Lewis Research Center, Cleveland, OH.)
Date Acquired
August 16, 2013
Publication Date
October 1, 1993
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 10
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
LEW-14939
Accession Number
93B10673
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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