BS&B Safety Systems VD-L-20 Rupture Disk Type S-90

BS&B Safety Systems VD-L-20 Rupture Disk, Type S-90, is a 3-inch (nominal) bursting disk designed for overpressure relief in BS&B StaSaf safety-head installations. Identified by part number 1171862, this disk carries a labeled burst pressure of 243 PSIG at 72°F, providing a precise, single-use venting threshold to protect equipment and personnel from excess pressure. As part of the S-90 family, it is intended for use with BS&B safety heads such as SRB-7RS, SRB-7FS, and S90-7R, ensuring compatibility within BS&B’s safety-system ecosystem. The VD-L-20 designation places this disk in BS&B’s VD rupture-disk lineup, offering reliable performance in configured assemblies where rapid rupture at the specified pressure is required to relieve process pressure. With a 3-inch diameter, the disk accommodates standard installation configurations used in BS&B applications, aligning with the corresponding safety-head hardware to deliver predictable venting behavior at the designated 72°F condition.