In the global industrial sector, process safety is shifting from 'passive protection' to 'active management.' In this upgrade process, a seemingly small component—the bursting disc—is undergoing a profound technological iteration. Increasingly, more factories are switching from conventional dome-shaped bursting discs to reverse arch bursting discs in their safety upgrade projects. Why is this trend emerging? And what are the differences between the two products?
Technical Comparison: The Fundamental Difference from 'Tension Failure' to 'Inversion'.
The core difference between standard arch and reverse arch bursting discs stems from their completely different rupture mechanisms. A standard arch bursting disc breaks by being 'pulled' to its limit, whereas a reverse arch bursting disc inverts by being 'compressed' to instability. These two distinct stress patterns determine their markedly different performance characteristics.
Performance indicators | Dome-shaped burst disk | Reverse arch bursting disc |
Operation ratio | Less than 70% (standard type). | Up to 90%. |
Fatigue resistance | Poor, pressure fluctuations easily cause cracks. | Excellent, elastic deformation tolerates frequent fluctuation. |
Back Pressure/Vacuum Adaptability | Requires an additional bracket; otherwise, it is prone to premature failure. | Naturally resistant with full vacuum, no bracket needed. |
Blast fragments | May produce fragments, interception device required. | No fragments, can directly connect the safety valve. |
Applicable media | Primarily gas. | Gas/Liquid/Two-phase mixed medium. |
Cost | Lower. | Slightly higher, but the total lifecycle cost is lower. |
Based on the core performance comparison between reverse arch bursting discs and traditional dome-shaped bursting discs, reverse arch bursting discs outperform dome-shaped ones in operating ratio, fatigue resistance, vacuum resistance, fragment-free performance, and media compatibility. Although the initial cost is slightly higher, the total lifecycle cost is lower, and the overall performance is better.
Why are factories worldwide accelerating the "model change"?
From a cost perspective, although the unit price of reverse arch bursting discs is slightly higher than that of dome-shaped discs, in terms of lifecycle cost, reverse arch bursting discs are more economical. Their service life, production efficiency, auxiliary equipment requirements, and maintenance costs are all far superior to dome-shaped discs.
From a safety perspective, in industries such as pharmaceuticals, food, and electronic chemicals, any tiny fragment could lead to batch rejection, downstream equipment damage, or safety valve jamming and failure. The fragment-free feature of reverse arch bursting discs is crucial for high cleanliness requirements.
From a compliance perspective, global standards are favoring reverse arch bursting discs. In international certification systems such as ASME and CE/PED, reverse arch bursting discs are gaining increasing recognition due to their higher safety levels.
Among the many reverse arch bursting disc suppliers, Shenyang Xinguang Aerospace Safety Systems Co., Ltd. has gained more trust from buyers based on its technical strength and quality control. Its reverse arch bursting discs are chosen by many customers for their excellent performance.
1. Fragment-free design.
Using a single-piece metal structure, the bursting disc ruptures along a preset weakened groove upon overpressure after losing stability, without producing any fragments. It can also be used in series with a safety valve to protect the valve from corrosion by aggressive media, ensuring its sealing performance.
2. Strong fatigue resistance.
Based on the principle of compression instability, the elastic deformation withstands frequent fluctuations, giving it better fatigue resistance than standard domed products. For process systems with pressure pulsations (such as stirred chemical reactors or natural gas compressor units), Shenyang Xinguang's reverse arch bursting disc can achieve long-term stable performance.
3. Can withstand complete vacuum without a vacuum support.
Many process systems undergo alternating operation between positive and negative pressure. Due to its unique arch structure, the reverse arch bursting disc remains stable even under full vacuum conditions, with no vacuum support required, simplifying installation and reducing system complexity.
4. Suitable for gas media, with customizable solutions for liquid applications.
Shenyang Xinguang's reverse arch bursting disc is suitable for gas media. For liquid or gas-liquid two-phase media, the company offers various technical solutions (such as annular groove designs) that can be customized according to specific operating conditions.
5. Maximum operating pressure can reach 90% of the minimum allowable bursting pressure.
This is the most prominent advantage of Shenyang Xinguang's reverse arch bursting disc. The operating ratio of standard domed bursting discs is typically only 70%-80%, meaning the system must operate below 70%-80% of the bursting pressure, which greatly limits production capacity. The operating ratio of our reverse arch bursting disc can reach 90%, allowing equipment to operate safely at higher pressures and directly improving production line efficiency.
Shenyang Xinguang Aerospace Safety Systems Co., Ltd. is the first professional manufacturer of bursting disc safety devices in New China to integrate research and development, production, sales, and service. Over its 60 years of establishment, the company has owned more than 30 independent intellectual property rights, participated in drafting multiple national bursting disc standards, and obtained CE/ASME UD system certification in 2022. The company's products are used in multiple fields. If you also want to learn about bursting discs, we welcome your inquiries.
