BS&B Safety Systems VD-Y-05 Rupture Disk S90 3 Inch

BS&B Safety Systems VD-Y-05 Rupture Disk S90 3 Inch is a solid metal reverse-buckling rupture disk that is designed for isolation in BS&B safety heads to provide rapid, predictable overpressure relief in fixed piping. The 3" nominal disk, part of the S-90 family and cataloged as 1172726 (VD-Y-05), is specified as 290 PSIG at -20°F, making it suitable for environments where low-temperature performance is required. It is intended for upstream installation with BS&B safety heads such as SRI-7RS, SRB-7RS, or S90-7R to protect downstream equipment from overpressure events. The S-90 disks are offered in a range of corrosion‑resistant materials, including 316 stainless steel, Nickel 200, Monel 400, Inconel 600, Hastelloy C-276, and other stainless variants, allowing selection for diverse chemical services. In BS&B catalogs, 3-inch S-90 disks have material-dependent burst ranges (for example, Nickel 200 versions list a broad burst-pressure window around 75–350 psig at 72°F, with Inconel 600 versions up to about 350 psig), illustrating the importance of selecting the correct material for the intended service temperature and chemistry. This VD-Y-05 configuration provides a compact, weld-ready solution that fits BS&B’s Sta-Saf and related safety-head configurations, aligning with standard installation practices for rupture disks in industrial safety systems.