NASA NTRS · 19700000620
Low-noise flow valve for air ducts
Abstract
Valve assembly controls air flow from feeder into main duct, with minimum of turbulence, friction, pressure differential, and noise. Valve consists of damper, deflector, and spring. Streamlining of damper and deflector merges flow smoothly, while spring keeps damper and deflector in contact and eliminates valve chatter and damping vibrations.
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Gallo, E. A.. 1970-12-01. Low-noise flow valve for air ducts. https://ntrs.nasa.gov/citations/19700000620
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