Bursting Discs: What They Are and How They Work


A bursting disc, also known as a ruptured disc or pressure relief valve, is a pressure-sensitive safety device designed to protect against overpressure in a system. They are widely used in the process industry to prevent equipment damage and protect personnel from harm in the event of a pressure increase. The disc is placed in a pressure containment vessel and acts as a safety valve, releasing pressure when it exceeds the set point of the disc.

The discs are typically made from thin metal or plastic and are installed in a pressure vessel, pipeline, or tank. They are designed to rupture at a specific pressure, allowing excess pressure to be vented from the system before it can cause damage or threaten personnel. In addition, the disc is designed to fail predictably, ensuring that the pressure relief system operates correctly and the system remains safe.

Several different bursting discs are available, including metal discs, soft-seated discs, and composite discs. Metal discs are made from thin metal, such as stainless steel or Inconel, and are designed to rupture when the pressure exceeds the set point. Soft-seated discs are made from a flexible material, such as rubber or silicone, and are designed to deform and relieve pressure when the set point is exceeded. Finally, composite discs are made from a combination of metal and flexible materials, providing the benefits of both metal and soft-seated discs.

The bursting disc is a passive safety device and does not require any external power or manual intervention to operate. Instead, it responds to the pressure within the system, and when the pressure exceeds the set point, the disc ruptures and relieves the pressure. This means that the disc is always ready to respond to an overpressure event, even if there is a power failure or personnel are not present.

One of the critical benefits of bursting discs is that they are simple and cost-effective. They do not require any maintenance or calibration and are easy to install. They are also reliable and have a long service life, making them an ideal solution for protecting against overpressure in many applications.

However, bursting discs do have some limitations. They are designed to fail once, and once the disc has ruptured, it must be replaced. This means that the disc must be replaced after every overpressure event, which can be time-consuming and costly. Additionally, bursting discs may not be suitable for systems with high-pressure fluctuations, as the disc may rupture frequently and require frequent replacement.

Elfab: A Leading Manufacturer of Bursting Discs

elfab is a leading manufacturer of bursting discs and pressure relief devices. Based in the UK, Elfab has been providing innovative solutions for over 60 years and is dedicated to providing customers with high-quality, reliable, cost-effective products worldwide.

Elfab offers a wide range of bursting discs to suit different applications and requirements. Their products include metal discs, soft-seated discs, and composite discs, and they also offer a range of accessories and systems to complement their bursting discs.

One of the critical features of Elfab’s bursting discs is their high-quality construction. They are manufactured to exacting standards, using the best materials and production methods to ensure they are reliable and long-lasting. As a result, customers can be confident that their systems will be protected against overpressure, even in the most demanding applications.

In addition to its high-quality products and excellent customer service, Elfab offers a range of technical training and support services. This includes training courses on pressure relief and bursting discs, as well as technical support and troubleshooting services to help customers get the most out of their systems.

Elfab is also dedicated to developing new and innovative solutions for the process industry. Their research and development team is constantly working on new products and solutions to help customers improve safety and efficiency in their systems. They also work closely with customers to understand their specific requirements and develop customised solutions to meet their needs.

One of the key benefits of working with Elfab is its global presence and network of distributors. They have a strong presence in Europe, the Americas, and Asia. Their network of distributors means that customers can access their products and services no matter where they are located. This helps ensure that customers receive the support and services they need, no matter where they are.

In conclusion, Elfab is a leading manufacturer of bursting discs and pressure relief devices and is committed to providing high-quality, reliable, and cost-effective solutions to customers around the world. So whether you are looking for a simple, cost-effective solution or a more complex system, Elfab has the products and services you need to protect your system against overpressure.