Home
BS&B Rupture Disks


BS&B Reverse Buckling Rupture Disks



The Reverse Buckling disk represents the best in rupture disk (bursting disc) technology. Invented by BS&B, our range of reverse buckling products provides a pressure relief solution for burst pressures ranging from a few inches of water column / a few millibar to over 70,000 psig / 4800 bar.

Burst pressure is accurately controlled by a combination of material properties and the shape of the disk domed structure. By loading the Reverse Buckling disk in compression it is able to resist operating pressures up to 100% of minimum burst pressure even under pressure cycling or pulsating conditions.

Designed for non fragmentation upon activation, Reverse Buckling disks are recommended for combination with pressure relief valves to isolate them from normal process conditions ensuring excellent leak tightness, reduced valve maintenance expenses and often allowing the use lower cost valve trim.

The Reverse Buckling disk represents the best in rupture disk (bursting disc) technology. Invented by BS&B, our range of reverse buckling products provides a pressure relief solution for burst pressures ranging from a few inches of water column / a few millibar to over 70,000 psig / 4800 bar.

Burst pressure is accurately controlled by a combination of material properties and the shape of the disk domed structure. By loading the Reverse Buckling disk in compression it is able to resist operating pressures up to 100% of minimum burst pressure even under pressure cycling or pulsating conditions.

Designed for non fragmentation upon activation, Reverse Buckling disks are recommended for combination with pressure relief valves to isolate them from normal process conditions ensuring excellent leak tightness, reduced valve maintenance expenses and often allowing the use lower cost valve trim.

The Sta-Saf® family of Reverse Buckling Disks includes the S90™, SKr™, RLS™, JRS™, FRS™, and Sigma EXL™ disks. Standard Features of the Sta-Saf® family are:
• 90% or greater operating ratio relative to ASME or CE
• Vacuum resistant
• Solid metal construction enabling optimum leak tightness
• Designed for nonfragmentation
• Recommended for isolation of pressure relief valves
• Metal tag with product identification and traceability data, as well as code symbol stamps as appropriate

• The Sure-Saf® CSI™ - uses SAF technology (structural apex forming), which enhances accuracy of burst pressure
LPS™ - provides low burst pressures from 5 psig (0.35barg)
RB-90™ - provides overpressure protection by reversing and snapping against precision stainless steel knife blades
Eco-Saf® ECR™ - offers the lowest burst pressures available from a reverse buckling disk; The disk relieves overpressure or vacuum
by reversing and opening at the perimeter of the dome
SVI™ - a single-use rupture disk assembly (no holder required) for isolating safety relief valves; For retrofit with fixed piping
SKR-U™ - an all purpose SKR rupture disk partnered with a threaded union-type holder


The BS&B SRB-7RS is the original pre-torqued Safety Head designed for reverse buckling rupture disks. The SRB-7RS allows proper clamping of a Rupture Disk to be completed before installation between companion flanges. This holder offers the advantage that an installed disk may be taken out of service, inspected, cleaned (if appropriate) and reinstalled provided the cap screws are not loosened and the torque value is maintained.
A J-bolt ensures the Safety Head is fitted in the required direction between companion flanges by engaging a blind hole drilled on the inlet companion flange perimeter. The J-bolt provides a constant visible signal of correct installation.
Providing multiple pipe flange compatibility, the SRB-7RS fits pipe flanges conforming to a wide range of International Standards, including ANSI, DIN, BS, AFNOR, UNI and JIS. BS&B suggests the use of Fluoropolymer coated capscrews (blue color) for enhanced corrosion protection.
Other features of the SRB-7RS include.
• Three asymmetric locating pins ensure centering and correct orientation of the disk within the Safety Head
• A "bite-type" seal for sizes 2" (50mm) and larger engages with the disk flange creating a metal-to-metal 'bubble tight' seal
• Maximized flow with full circular opening
• Flow arrows indicate direction of flow


We provide on-site training programs include "Advanced Maintenance Workshops" covering:

  • Rupture disk technology
  • Selection, sizing and specification
  • Installation and maintenance procedures
  • Safety considerations
  • Field event analysis
  • Individual site considerations
  • Explosion vent technology
  • Buckling pin technology

Contact us to set up a Seminar



Ask our experts!


Whether you have a simple question, or product application contact us at:


304-422-4755 or

info@gwindustrial.com



Our Office Hours

Mon-Fri, 8 AM - 5PM


We accept Mastercard and Visa credit cards