BS&B SKi reverse buckling disk

Rupture disks respond to differential pressure. A conventional disk installed on a header with variable back pressure therefore bursts at a pressure that shifts with whatever is happening downstream, and the only remedy used to be a second disk or a complicated analysis. The SKi is the first reverse buckling disk designed to be back-pressure independent: two rupture elements work together so that a variable back pressure between 0 and 2 bar has no influence on the burst pressure, and it still opens cleanly when the differential is reached.

Beyond that, the SKi packs the performance of the Sta-Saf family into the sizes where reverse buckling disks were traditionally hard to make consistent. Its patented opening geometry gives a clean, predictable burst at pressures from 3.45 bar upwards without any risk of fragmentation.

Like the rest of the Sta-Saf range it runs at up to 90 % of the marked burst pressure, resists full vacuum and has the best fatigue life in the BS&B programme. It is the natural choice for small vessels, pump protection and packaged equipment, and it fits the same pre-torqued SRI-7RS and SRB-7RS safety heads as the SKr so an installed base can be mixed without changing holders.

Selection data we need

Size, burst pressure and temperature, operating pressure, medium and flange rating. Mention if the disk is combined with a safety relief valve.