ENHANCED REVERSE BUCKLING RUPTURE DISC

摘要

The disc is defined by an annular flat flange region (12), a concave-convex disc dome region (16) and a transition region (14). One or more deformations (18) may be formed at the apex of the disc dome region for weakening the disc to the point that incidental damage to the disc will not weaken the disk any further, thereby ensuring that the disc will reverse at a certain pressure, and no lower. The disc has irregular transition regions (20) at the base and a partial circular groove (30). The irregular transition region of the disc cooperates with a shear enhancing means such as a protrusion (22) or notch (23) formed in a support ring (24) or disc holder (27) disposed downstream of the disc. A back pr essure support means (29) is included. An ungrooved region (32) of the transition region acts as a hinge holding the ruptured disc dome.