Butterfly valve and method of manufacturing the same
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United States of America Patent
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Nov 28, 2023
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N/A
app pub date -
Sep 29, 2021
filing date -
Apr 25, 2018
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Abstract
The butterfly valve comprises a body in which an inserting space is formed; and a disk inserted into the inserting space of the body, wherein fluid flow is opened or closed in response to rotation of the disk, wherein the disk further includes: a disk body formed of a metal; a first plastic layer formed of a first plastic on the disk body; a second plastic layer formed of a second plastic on the first plastic layer, wherein a melting point of the first plastic layer is different from a melting point of the second plastic layer, and the disk body is formed of a framework structure having an internal space.
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