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Useful Elastic Recovery with Metallic Sealing Solution

Stephen Lint, a design engineer from Technetics Group in Columbia, delves into the concept of useful elastic recovery in metallic sealing solutions. He sheds light on how metallic seals exhibit elastic deformation, offering sealing capabilities even after decompression, which can be advantageous in static systems where joint or flange separation may occur due to external…

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Stephen Lint, a design engineer from Technetics Group in Columbia, delves into the concept of useful elastic recovery in metallic sealing solutions. He sheds light on how metallic seals exhibit elastic deformation, offering sealing capabilities even after decompression, which can be advantageous in static systems where joint or flange separation may occur due to external factors.

Through a simulation depicting the compression and subsequent decompression of a seal, Steven highlights the total compression and permanent deformation values, denoted as e sub naught. The useful elastic recovery of the seal lies between these two compression amounts and determines the point at which loss of sealing performance occurs, rather than the loss of actual contact.

Determining the exact extent of useful elastic recovery a seal can handle proves challenging, as it cannot be accurately predicted through calculations or analysis alone. Testing becomes essential to account for various factors that impact the final value, including seal design, system pressure, system temperature, sealing surface finishes, and required gasket load.

Technetics Group recognizes the significance of useful elastic recovery in optimizing sealing solutions and ensures a comprehensive approach to achieve desired sealing performance. By conducting thorough testing and considering the various influencing factors, Technetics Group delivers reliable and effective metallic sealing solutions that can withstand dynamic conditions and maintain their sealing capabilities.

Technetics Group’s expertise in seal design and their commitment to quality engineering enable them to offer advanced sealing solutions that meet the specific requirements of diverse industries and applications.

Video TranscriptExpand ↓

Hi. I'm Steven, a design engineer with Technetics Group Columbia. In this video, I'll be discussing the concept of useful elastric recovery with metallic sealing solutions. Much like elastomeric steels, metallic steels have a degree of elastic deformation which occurs in addition to the plastic deformation of the outermost sealing material. When decompressed, the seal can still provide sealing until the seal track contact pressure reduces to the point of significant least leakage. This can be useful even in static systems since external factors may cause the joint or flanges to separate slightly. Taking a look at this simulation of a seal being compressed and subsequently decompressed, we can clearly identify the total compression of the seal and permanent deformation value, e sub naught of the seal. The useful elastic recovery will fall somewhere between these two amounts of compression and will ultimately correspond to when loss of ceiling performance occurs rather than when actual contact is lost. Wantifying the exact amount of useful elastic recovery seal can handle is difficult and cannot be accurately determined through calculations or analysis. Instead, testing is required to ensure all factors are accounted for. When considering useful elastic recovery, all of the following factors can impact the final value. Seal design, system pressure, system temperature, sealing surface finishes and requiredly great.

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