A reverse-acting rupture disc (also called a reverse buckling rupture disc) is an advanced compression-loaded pressure relief device. Its convex side of the arched structure bears the pressure, which is different from conventional forward-acting types. This design enables the disc to first undergo reverse deformation and unstable inversion when overpressurized, then rupture rapidly along the pre-scored groove. The non-fragmenting design is one of the most prominent features of reverse-acting rupture discs. With precision-guided fracturing, specialized supports and blade assistance, it ensures that the arched disc ruptures integrally without generating loose metal fragments, making the pressure relief process clean and reliable.
Principles and Technical Features of the Non-Fragmenting Design:
The unique operating mechanism of reverse-acting rupture discs is what prevents fragment generation during rupture. As pressure builds up in the application environment, it causes the reverse-acting disc to deform in the opposite direction, eventually making contact with the support blade or rupturing steadily along the C-shaped pre-scored groove. The entire arched disc flips open instead of tearing apart and scattering. This combination of guided fracturing and compression loading ensures that any fragments are either contained within the disc structure or eliminated entirely.
Compared with fragmenting designs, non-fragmenting reverse-acting rupture discs demand higher standards for material selection, manufacturing precision and support matching, while also delivering enhanced safety performance. The design with locating pins further ensures accurate installation and prevents reverse mounting errors.
Multiple Advantages of the Non-Fragmenting Design:
Prevention of Downstream Contamination and Damage:
Conventional fragmenting rupture discs may produce metal shards upon rupture, which can enter pipelines or equipment, causing blockages, damaging pumps and valves, or contaminating the medium. The non-fragmenting design guarantees integral rupture with no fragment dispersion, making it especially suitable for clean or sensitive systems that use rupture discs for pressure relief.
Suitability for Toxic and Flammable Media:
When handling toxic, corrosive or flammable media, the non-fragmenting feature prevents secondary accidents or environmental pollution triggered by flying fragments, boosting the overall safety of the system. Rupture discs for pressure relief with this design have become a preferred choice for such high-risk working conditions.
Compatibility for Series Connection with Safety Valves:
The fragment-free nature of reverse-acting rupture discs allows direct integration with safety valves in a series configuration. This setup achieves zero leakage, extends the service life of safety valves, and cuts down maintenance costs.
Higher Reliability and Adaptability:
Non-fragmenting reverse-acting rupture discs offer excellent fatigue resistance and a high operating ratio. They are suitable for fully liquid-phase or gas-liquid mixed media systems that rely on rupture discs for pressure relief for overpressure protection.
In industries such as petrochemicals and pharmaceuticals, non-fragmenting reverse-acting rupture discs provide more stable overpressure protection and reduce accident risks.
Shenyang Xinguang Aerospace Safety Systems Co., Ltd. is a professional enterprise with over 60 years of experience in R&D, manufacturing and service of rupture disc safety devices. We hold CE and ASME UD certifications and can supply high-precision reverse-acting rupture discs. We welcome all purchasers to contact us for potential cooperation opportunities!
