Rupture disks can be classified under 2 different categories depending on the design and how it is activated.
REVERSE BUCKLING 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.
List of Reverse Buckling Disks
- LPS Reverse Buckling Disk
- SKR Rupture Disk
- SIGMA EXL
- BIO-SAF System
- STA-SAF System
- SKR-U Reverse Buckling Disk
- SURE-SAF System
- GCR-S Reverse Buckling Disk
- ECO-SAF System
- RB-90 Reverse Buckling Disk
- MRB High Pressure Rupture Disk
FORWARD ACTING DISKS
Forward acting, or conventional rupture disks (bursting discs) have been a mainstay in process applications since BS&B developed the first rupture in 1931. Developed in 1934, the Type B disk, the "granddaddy" of all rupture disks (bursting discs) is still the disk-of-choice in many applications.
Applying load to the concave side, the disk is subjected to tension forces. Forward acting disks regulate burst pressures by the tensile strength of the material.
For low burst pressures, the Type D disk has a slotted metal top section and a metal or fluorocarbon seal. For higher operating ratios, the scored NU-SAF family of disks is often selected for polymerization processes. Our VAC-SAF line offers protection from excessive vacuum or overpressure.
For tank car applications, the ITC disk protects intermodel tank containers while the SR-TC is a surge resistant disk for railroad took cars and over-the-road trailer service industry.
A wide range of standard rupture disk (bursting disc) assemblies is available for your specific application. These Threaded and Welded Assemblies are discarded after disk rupture. Customized designs are available for customer applications that cannot be met using standard assembly designs.
List of Forward Acting Disks
- Solid Metal Rupture Disk (Bursting Disc) Type B
- Composite Bursting Disk Type D
- NU-SAF Rupture Disk
- VAC-SAF Rupture Disk
- ITC Cargo Gard
- SR-TC Rupture Disk
- Assemblies - Custom Rupture Disk (Bursting Disc)
Many customer applications cannot be met using standard rupture disk (bursting disc) and safety head designs. That’s why BS&B has invested in a department committed to the development of customized rupture disk assemblies.
Examples of special requests:
- Special disk holder design
- Exotic materials
- Cryogenic or elevated temperature
- Lower or higher item standard burst pressures
- Hermetic sealing
- Qualification procedures, testing and documentation
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