| 摘要 |
PROBLEM TO BE SOLVED: To provide a safe pressure relief valve in which pressure is prevented from leaking by pressing of an inner cylinder, a rapture disk is not damaged, and the inner cylinder can not be touched from the outside if it is attached to a pressure container. SOLUTION: A pressure relief valve is constituted of an outer cylinder 1 provided with a head part 2, and an inner cylinder 8 to be fitted in the outer cylinder 1, and a hole 4 communicated with an opening part 5 of the outer cylinder 1 is provided on the side surface of the head part 2 of the outer cylinder 1. A rapture disk whose outer peripheral edge is pinched by a packing, and for blocking the opening part 5 of the outer cylinder 1 and an opening part 11 of the inner cylinder 8 is provided between the outer cylinder 1 and the inner cylinder 8. A thin part 7 of the outer cylinder 1 is caulked to the outer end of the inner cylinder 8 by a press machine. |
