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Cover Story
A depiction of the fabrication process for TEADIT ®’ s TF1590 gasket solution.
TEADIT ® sealing experts engineering a metallic gasket.
Kammprofile gaskets, such as TEADIT ® 942 and TEADIT ® 946, achieve this through a serrated metal core. These serrations create alternating high- and lowstress zones that trap the sealing material, preventing it from migrating under shear forces.“ There are saw tooth profiles that create dams or barriers to hold the graphite in place,” stated Mark. Corrugated metal gaskets operate on a similar principle, using a wave-like structure to create stress distribution and maintain sealing performance. Both designs enable the use of sealing materials such as graphite and PTFE, which facilitate movement while maintaining tightness. The result is a gasket that not only seals effectively but also adapts to the dynamic conditions inherent in heat exchanger operation.
Solving problems in the field The benefits of advanced gasket technology are perhaps best illustrated through real-world applications. One recent case involved a refurbished heat exchanger that failed hydrostatic testing due to flange imperfections. The traditional semi-metallic gasket designs could not accommodate the uneven sealing surface, leading to leakage. Rather than resorting to time-consuming and costly flange re-machining, TEADIT ® implemented an innovative diagnostic approach. A kammprofile gasket with a thick expanded PTFE layer was installed and then removed to map areas of compression. This simple yet effective method revealed high and low points across the flange surface. With this information, the team used gasket tape to shim the low areas, creating a more uniform sealing surface. The solution avoided the need for specialized measurement equipment, reduced downtime, and enabled successful sealing. Mark highlighted the broader significance.“ The amount of cost associated with downtime always outweighs the cost of anything associated with a bolted flange joint. By addressing both the gasket and the system in which it operates, reliability was restored without extensive rework.” Such examples highlight a critical principle. Gasket performance cannot be isolated from the condition of the flange, the quality of installation, or the overall system design. Success lies in integrating all these elements into a cohesive solution.
Efficiency, emissions, and innovation As industries pursue greater efficiency and lower emissions, gasket technology is evolving to support these goals. One major area of advancement is in analytical tools and engineering methodologies. Modern standards and practices, including advanced flange analysis and thermal modeling, enable more accurate prediction of joint behavior under real operating conditions. Robbie reiterated the importance of this holistic approach.“ The wrong gasket can absolutely cause a leak. The right gasket does not solve the leak all on its own. It is part of a system.” Understanding the system through simulation, testing, and expertise is essential for optimizing performance. Emerging gasket technologies are also focusing on enhanced recovery characteristics, allowing joints to
10 Heat Exchanger World May 2026 www. heat-exchanger-world. com