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Magnetic Check ValvePoppet in proposed check valve restored to closed condition by magnetic attraction instead of spring force. Oscillations suppressed, with consequent reduction of wear. Stationary magnetic disk mounted just upstream of poppet, also containing magnet. Valve body nonmagnetic. Forward pressure or flow would push poppet away from stationary magnetic disk so fluid flows easily around poppet. Stop in valve body prevents poppet from being swept away. When flow stopped or started to reverse, magnetic attraction draws poppet back to disk. Poppet then engages floating O-ring, thereby closing valve and preventing reverse flow. Floating O-ring facilitates sealing at low loads.
Document ID
19940000070
Document Type
Other - NASA Tech Brief
Authors
Morris, Brian G. (NASA Lyndon B. Johnson Space Center, Houston, TX.)
Bozeman, Richard J., Jr. (NASA Lyndon B. Johnson Space Center, Houston, TX.)
Date Acquired
August 16, 2013
Publication Date
February 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 2
ISSN: 0145-319X
Subject Category
MECHANICS
Report/Patent Number
MSC-22046
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.