NASA NTRS · 19930000223
Face-Sealing Butterfly Valve
Abstract
Valve plate made to translate as well as rotate. Valve opened and closed by turning shaft and lever. Interactions among lever, spring, valve plate, and face seal cause plate to undergo combination of translation and rotation so valve plate clears seal during parts of opening and closing motions.
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Tervo, John N.. 1992-04-01. Face-Sealing Butterfly Valve. https://ntrs.nasa.gov/citations/19930000223
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