Reverse-buckling rupture disk with replaceable disk and blade

摘要

A reverse-buckling rupture disk assembly provides a cylindrical housing having a bore for conveying flow through the housing. Removably mounted within the housing is a frangible concave-convex disk which is connected along its peripheral edge to the housing so as to form a closure to the bore. The housing can be disassembled and such disassembly allows removal and replacement of the disk. The disk is designed to resist pressure on the convex side up to a predetermined pressure and then collapsing after the predetermined pressure is reached. A knife blade is positioned within the housing bore on the concave side of the disk for perforating the disk when it collapses. The ends and center of the blade are removably connected to the inner surface of the housing so that the blade can be replaced after it wears or otherwise needs replacement. The knife blade is spaced from the inner surface of the housing at least along a substantial portion of its length. The knife blade can be serrated and is preferably curved. Reference to Related Application