Forward acting rupture disc Type D

composite

Composite Bursting Disc Type D The Type D Composite Bursting Disc consists of a slotted metal top section and a plastic or metal seal membrane located at the concave or pressure side of the top section. The top section is the pressure zone and controls bursting rating of disc. Since the top section has open slots, the seal isolates it from process media and prevents leakage. Like the Type B Solid Metal Bursting Disc, the Type D composite disc is dome-shaped with an angular seating arrangement. Pressure is applied to dished or concave side, subjecting disc metal to tension loading. Seal material in the Type D bursting disc is thin and subject to damage by a foreign substance on seating surfaces or flanges. It may be desirable to use a heavier gauge metal ring permanently mounted to the seat area of the plastic or metal seal. This assembly is called Type DR bursting disc. When two rings are used, the assembly is called Type DRR bursting discs.