| 摘要 |
PURPOSE: A butterfly valve for retaining sealing performance at low and high temperature is provided to secure strong sealing efficiency in high pressure by increasing first and second contact positions in an opposite direction. CONSTITUTION: A butterfly valve for retaining sealing performance at low and high temperature comprises a body(100), a disk part(200), first and second seat parts, and a sealing part. The disk part is installed in an internal space of the body to rotate. The disk part opens and closes the internal space according to the rotation of a disc(220). The first and second seat parts are made of a metal material. The first seat part is fixed to the disc to be projected in the outer circumference of the disc. The second seat parts are projected in the inner circumference of the body and faces to the first seat part. The sealing part seals the gap between the outer circumferences of the disc and the inner circumference of the body. The sealing part is inserted between the first and second seat parts and is touched with the first and second seat parts, respectively. |
