| 摘要 |
PROBLEM TO BE SOLVED: To provide a branch device capable of keeping a sealing state with respect to a fluid pressure from a fluid pipe side and a branch part side.SOLUTION: A branch device includes a case body provided on an outer peripheral surface of a fluid pipe in the state of hermetically surrounding a hole part of the fluid pipe, a branch part 3c extended from the case body and communicated with the hole part, a substantially arc-shaped valve element 4 provided in the case body and movable along the outer peripheral surface of the fluid pipe, and a sealing ring 7 having a seat part 7a attached to the case body in such a manner of surrounding a branch port 3d of the branch part 3c and a seal part 7b positioned on the valve element side, and controls the fluid flowing in and out to and from the case body through the branch port 3d by the valve element. A groove part 7e is formed on the seal part 7b of the annular sealing ring 7 along an annular direction, and at least two sealing head parts 7f and 7g are formed by the groove part 7e. |
