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BS&B · Rupture Disks

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BS&B Vac-Saf RLBP / RLBV low pressure disk

Reverse buckling disk for very low burst pressures, 12 to 747 mbar, DN50 to DN200, with optional calibration in both directions. Non-fragmenting, for gas or liquid with gas pocket.

Burst pressures measured in millibar are a specialist field. The RLBP (pressure) and RLBV (vacuum) disks use reverse buckling geometry to give a reliable, repeatable burst from as low as 12 mbar, which is territory normally reserved for large weight-loaded vents or fragile graphite disks.

Both variants open without fragmentation and mount in the same HL-7RS and HL-7R holders as the HiLo. The disks can be calibrated in one or two directions, so a tank that only needs vacuum protection gets the RLBV, one that needs pressure relief gets the RLBP, and one that needs both at similar levels can use a two-way calibrated disk.

Selection data we need

Size, burst pressure and direction(s), temperature, operating pressure range, medium and flange rating.

Applications

  • Atmospheric and low-pressure storage tanks
  • Vacuum protection of vessels
  • Dust collectors and dryers
  • Glass-lined equipment

Models: Rupture Disks

BS&B

BS&B Sigma / Sigma EXL reverse buckling disk

Flagship Sta-Saf reverse buckling disk: operates at up to 95 % (ASME) or 100 % (CE/PED) of burst pressure, full vacuum resistant, non-fragmenting, DN25 to DN600.

BS&B

BS&B SKr reverse buckling disk

Scored reverse buckling disk with a 90 % operating ratio and burst pressures from 0.6 to 34.5 bar, non-fragmenting, for gas, vapour and liquid service. The all-round Sta-Saf disk.

BS&B

BS&B SKi reverse buckling disk

The first back-pressure independent reverse buckling disk: variable back pressure up to 2 bar has no effect on the burst pressure. DN25 to DN250, 3.45 to 34.5 bar, 90 % operating ratio, non-fragmenting.