NASA NTRS · 19720000347
An economical vent cover
Abstract
Inexpensive formed-plastic vent cover has been developed that allows controlled purge of vent systems and also provides blowout protection. Cover can also be used in relief mode to allow normal system relief flows without disengaging from vent system. Cover consists of two parts made of plastics with varying densities to fit media used and desired pressures.
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Lee, A. C., Mcdonald, M. D.. 1972-07-01. An economical vent cover. https://ntrs.nasa.gov/citations/19720000347
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