Butterfly valve and method of manufacturing the same
OwnerSang Seon LEEinventor
Life of this patent
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Abstract
A butterfly valve which may enhance corrosion resistance or acid resistance with keeping its strength, have light weight and realize mass production, and method of manufacturing the same. are disclosed. 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. Here, the disk includes a disk body formed of a metal, and at least one plastic layer formed on the disk body.
Claims18
A butterfly valve comprising:
- 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;
- and
- 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.
A fluid contacting member contacted with a fluid in a valve, the fluid contacting member comprising:
- a body formed of a metal and manufactured by using a mechanical processing;
- a first plastic layer formed on the body and formed of a first plastic;
- and
- a second plastic layer formed on the first plastic layer and formed of a second plastic,
- wherein the plastic layers are formed through an insert molding, and a melting point of the first plastic is different from a melting point of the second plastic.
A method of manufacturing a disk used in a butterfly valve, the method comprising:
- forming a first plastic layer on a disk body formed of a metal through an insert molding;
- and
- forming a second plastic layer on the first plastic layer through an insert molding,
- wherein a melting point of a first plastic of the first plastic layer is different from a melting point of a second plastic of the second plastic layer.
Dependencies are inferred from the claim text.