Patent ID: 8857793
Filing Date: 2014-10-14
Classification: F16K

Abstract:
1. A butterfly valve, comprising: a body defining an inner space having two open ends and an inner circumferential surface; a disk unit having a disk rotatably installed at the inner space, and configured to selectively open and close the inner space according to a rotation of the disk, said disk having an outer circumferential surface facing said inner circumferential surface; a first seat portion protruding from a portion of the outer circumferential surface of the disk; a second seat portion protruding from the inner circumferential surface of the body, and arranged to radially face the first seat portion; and a sealing unit mounted to the body, and formed to contact the first and second seat portions such that a gap between the outer circumferential surface of the disk and the inner circumferential surface of the body is sealed, wherein the sealing unit comprises: a first contact portion inclined with respect to a central line of the body, located at one side of the sealing unit, and contacting the first seat portion; and a second contact portion inclined with respect to the central line of the body in a direction opposite to the first contact portion, located at an opposite side of the sealing unit, and contacting the second seat portion.