Butterfly valve formed of a laminated material
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United States of America Patent
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Apr 16, 2019
Grant Date -
Dec 28, 2017
app pub date -
Dec 14, 2015
filing date -
Dec 26, 2014
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Abstract
A butterfly valve includes a valve body-side valve seat section, a valve box-side valve seat section, and a valve movement mechanism. The valve movement mechanism includes a cam groove, a cam projection, and a reverse key. The valve movement mechanism moves the valve body in an extending direction of the flow passage along with rotation of the valve shaft between a blocking position and an open position. One of the valve body-side valve seat section and the valve box-side valve seat section is formed of a laminated material composed of alternatingly stacked plates made of metal and plates made of expanded graphite.
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