In industries such as petrochemicals, fine chemicals, high-pressure storage and transportation, and pharmaceuticals, equipment is often exposed to long-term high temperatures, high pressures, strong corrosion, and pressure fluctuations. The operational reliability of pressure relief devices is directly critical to production safety. The reverse arch clamp type bursting disc (YJ), based on its “reverse buckling instability” working principle, fatigue resistance, and precise relief accuracy, is suitable for overpressure protection of key equipment such as reactors, polymerization units, heat exchangers, and high-pressure storage tanks.
Structural Principle:
Traditional bursting discs are mostly of a forward arch structure, relying on tensile rupture for pressure relief, which makes them susceptible to pressure fluctuations and fatigue. In contrast, the arch direction of the reverse arch clamp type bursting disc (YJ) is opposite to the system pressure. The disk is subjected to compressive stress when pressurized, and upon reaching the set pressure, it instantly buckles, flips open, and relieves pressure.
This structure offers two key advantages:
Before activation, the disk experiences almost no tensile stress, providing superior fatigue resistance compared to forward arch designs, making it suitable for frequent pressure fluctuations or pulsating conditions.
The response is millisecond-level, enabling rapid overpressure mitigation.
Sealing Performance:
For highly toxic, flammable, explosive, high-purity, or high-value media, even leakage can lead to environmental, safety, or product contamination issues. Safety valves may experience slight valve lift near the set pressure. The reverse arch clamp type bursting disc (YJ) features an all-metal structure with no moving parts, ensuring zero leakage before activation.
This component is ideal for applications with stringent sealing requirements, such as fluorochemical production, phosgene synthesis, high-purity gas storage and transportation, and pharmaceutical reaction systems. It can also be used in series with a safety valve, installed on the inlet side of the safety valve to protect it via its zero-leakage characteristic while providing reliable relief during overpressure.
Fatigue Resistance and Corrosion Resistance：
Typical equipment with pressure fluctuations often operates under conditions of pressure cycling, temperature alternating, and corrosive media over long periods. The reverse arch clamp type bursting disc (YJ) is manufactured from materials such as stainless steel, Hastelloy, Inconel, Monel, and titanium alloys, through precision machining and heat treatment, offering excellent corrosion and fatigue resistance.
In scenarios with high-frequency pressure fluctuations—such as compressor outlets, agitator shaft protection in polymerization reactors, and overpressure protection for heat exchanger tube sides—the reverse arch clamp type bursting disc (YJ) maintains long-term operational performance, reduces the risk of premature bursting, extends equipment operating cycles, and lowers maintenance and replacement frequency.
Manufacturing Precision and Standardization:
Different process systems have strictly limited overpressure protection thresholds. The reverse arch clamp type bursting disc (YJ) achieves highly accurate calibration over a wide pressure range by controlling disk thickness, arch radius, and heat treatment processes, with manufacturing tolerances controlled within ±5%.
Application Scenarios:
Chemical and Fine Chemical Industry: Polymerization reactors, chlorination reactors, phosgenation units, high-pressure hydrogenation units.
Petroleum and Natural Gas: High-pressure separators, gas compressor skid-mounted equipment, liquefied gas storage tanks.
Pharmaceutical and Bioengineering: Fermenters, sterile reaction systems, solvent recovery units.
New Energy and Storage/Transportation: High-pressure hydrogen storage and transportation systems, LNG storage tanks, carbon capture units.
Selection and Maintenance Recommendations:
Selection considerations include: system design pressure, operating pressure fluctuation range, media corrosiveness, temperature, and whether production shutdown for replacement after relief is acceptable. For conditions with frequent pressure fluctuations or strict sealing requirements, the reverse arch clamp type bursting disc (YJ) is preferred over safety valves or forward arch bursting discs. For systems that allow repeated resealing and have clean media, a series combination with a safety valve can be adopted.
Maintenance and operation:
The reverse arch clamp type bursting disc (YJ) does not require periodic calibration but should be replaced regularly based on operating conditions and the manufacturer’s recommendations. During installation, correct orientation must be confirmed, mechanical damage avoided, and batch numbers and set pressure calibration values recorded to establish equipment management documentation.
Shenyang Xinguang Aerospace Safety System Co., Ltd. specializes in the R&D and manufacturing of bursting disc safety devices, with over 20 years of mastery over core reverse arch clamp type bursting disc (YJ) technologies, as well as complete material and testing systems. Its products are applied across petroleum, chemical, pharmaceutical, clean energy, and other fields, offering customers full-process services including selection calculations, solution design, and after-sales technical support.
