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Tapped-Hole Vent PathLong helical vent path cools and releases hot pyrotechnical gas that exits along its spiraling threads. Current design uses 1/4-28 threads with outer diameter of stud reduced by 0.025 in. (0.62 mm). To open or close gassampler bottle, pyrotechnic charges on either one side or other of valve cylinder are actuated. Gases vented slowly over long path are cool enough to present no ignition hazard. Vent used to meter flow in refrigeration, pneumaticcontrol, and fluid-control systems by appropriately adjusting size and length of vent path.
Document ID
19820000183
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Chandler, J. A.
Date Acquired
August 10, 2013
Publication Date
March 1, 1983
Publication Information
Publication: NASA Tech Briefs
Volume: 7
Issue: 1
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
MSC-20146
Accession Number
82B10183
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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