Top-rod rupture disc device: a robust barrier protecting against extreme working conditions

Industry Status：

From traditional petrochemicals and power energy to the rapidly developing new energy and aerospace sectors, the demand for highly reliable safety equipment is increasing daily across various industrial fields. Among them, rupture discs, as a crucial "last line of defense," directly safeguard the safety baseline of the entire industrial system.

Example 1. A large phthalic anhydride production enterprise in Shandong Province

Urgent difficulties:The phthalic anhydride production process involves easy crystallization of the medium and high reaction temperatures. Ordinary rupture discs are easily blocked by crystallization, leading to pressure relief failure. If valve-type safety pressure relief devices are used, their sealing performance often fails to meet stringent leakage rate requirements. The enterprise suffers annual losses exceeding 500,000 yuan due to leakage.

Solution:BasCo DN800 rod-type rupture discs were selected, with a burst pressure of 0.19 MPa and a burst temperature of 160℃.

Results:Continuous operation for 12 months without blockage or leakage, passing the special safety production inspection.

Example 2. Acrylic Ester Project of a Petrochemical Company

Urgent difficulties:Acrylic acid is highly prone to adhesion. If conventional rupture disc safety devices are used to protect the acrylic unit, the adhesion of the medium will cause inaccurate burst pressure, resulting in premature or delayed bursting. The original rupture discs would inevitably become blocked by crystallization within 3 months, causing multiple overpressure alarms.

Solution:BasCo DN800 push-rod type rupture discs were selected, with a burst pressure of 0.19 MPa and a burst temperature of 420℃.

Results: Zero leakage after 8 months of operation; continuous operation period extended by 30%; annual maintenance cost savings of over 400,000 RMB.

Core Advantages: Four Key Features to Solve Operating Condition Challenges

1. Dual trigger mechanism for absolutely reliable venting

The dual-action design of "rod instability + rupture disc rupture" maintains absolute sealing under normal conditions, and opens rapidly when the pressure reaches the set value, forming a smooth venting channel and preventing malfunctions.

2. Extreme environment tolerance, suitable for complex working conditions

• Corrosion and non-stick: Available in materials such as Hastelloy and fluoroplastic lining, suitable for hydrofluoric acid, chlorine, and easily crystallizing media;

• High temperature resistance and low pressure adaptability: Suitable for high-temperature reaction systems such as phthalic anhydride and acrylic acid, and can also provide low-pressure protection for precision equipment.

Random inspection and testing of the top rod type rupture disc device:

The test strictly followed the requirements of the rupture disc standard GB/T 567, and the test results met the requirements.

3. Zero-leakage seal ensures production safety.

Under normal operating pressure, the components fit tightly together to achieve an absolute seal, with a leakage rate approaching zero. This makes it particularly suitable for highly toxic, expensive media, and radioactive environments, eliminating material loss and environmental risks.

4. Compact and flexible structure, convenient installation and maintenance

Utilizing a flange connection design, it can be directly installed on pressure vessels and pipeline bodies, adapting to different equipment interface requirements. No daily maintenance is required, significantly reducing operation and maintenance costs.

Focusing on high-risk scenarios, widely applicable to multiple industries

Chemical industry：

Overpressure relief for phthalic anhydride reactors, acrylic acid storage tanks, polymerization kettles, etc.

Pharmaceutical industry:

Zero-leakage protection for corrosive raw material storage tanks and sterile reactors;

Energy and environmental protection:

Self-pressurizing liquid nitrogen tanks, RTO/RCO furnace pressure control;
Specialty industries:

Dust systems, explosion-proof pressure relief for ultra-high pressure reactors.

Strict quality control ensures reliability.

From rigorous overall testing to specific verification of key performance indicators, Jiangsu Bafang conducts various inspections and tests on each device in accordance with the specifications, striving to ensure its stable performance in long-term use and provide customers with lasting peace of mind.

Rupture disc device opening pressure test

The test strictly followed the requirements of rupture disc standard GB/T 567, and the test results met the requirements.

Meanwhile, we support customized services to precisely match working conditions; we provide installation guidance and after-sales support to ensure a worry-free experience throughout the process.

Building a Solid Last Line of Defense for Safety

Safety never relies on luck, but on tangible barriers. Jiangsu Bafang Safety Equipment Co., Ltd., based on technological innovation, is committed to providing precise and suitable safety pressure relief solutions for various industries, safeguarding every line of defense in production operations.