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Differential Pressure Helps Seal Ball ValveLeakage suppressed despite O-ring wear. New design eliminates leakage in vacuum selector valve on Space Shuttle waste-control subsystem. Applied to improve sealing in laboratory and industrial vacuum systems and other plumbing involving switching among lines with pressure differentials of order of 1 atmosphere (0.1 MPa).
Document ID
19840000330
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Mangialardi, J. K. (General Electric Co.)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: NASA Tech Briefs
Volume: 8
Issue: 4
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
MSC-20615
Accession Number
84B10330
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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