PTFE energized seals have found a multitude of applications in the aerospace industry.
Advanced EMC Technologies Blog
Cryogenic sealing applications are challenging, to say the least. One popular solution is the use of spring-energized seals, and in this blog post we are going to talk about the 3 post popular materials used for spring-energized seals for cryogenic applications: PTFE, modified PTFE, and UHMW PE.
LNG applications can be challenging, with cryogenic temperatures and extreme temperatures combining to create a nightmare for your typical seal. However, there are excellent, reliable sealing solutions for LNG applications.
The medical device industry faces continually evolving challenges when it comes to finding the right
sealing solutions for new and improved designs. Issues such as sterilization, wide ranges of expected
pressure, potentially aggressive environments, and FDA and USP approval make the design and
specification process quite challenging. In this article, we are going to look at custom spring energized PTFE seals as a potential solution for sealing challenges in the medical industry.
The performance of a dynamic PTFE seal depends greatly on the pressure and shaft velocity involved. In reality, a seal is in contact with only a small area of rotating shaft, which means that the dynamic forces and energy are going to be concentrated there. Much of the energy that comes from the shaft is going to be dissipated in two forms: wear and frictional heat, both of which can reduce the useful life of a seal. An increase in the force that holds the seal lip against the shaft or an increase in the speed of the shaft makes the effects of wear and heat even worse.
The useful life of a PTFE seal is heavily influenced by the surface over which the seal slides or rotates. This includes both the material choice, surface finish, and hardness of the mating surface. In this article, we will look at how the mating surface influences the life and behavior of a PTFE seal and how to account for that effect during the design process.
FLUID MEDIA AND PTFE SEALS:
You may not be aware of the fact that the fluid media has a significant effect on seal wear. In this article, we are going to explore exactly how fluid media can affect the performance of your PTFE spring-energized seal.
Need additional education? Check out these "Popular PTFE Post" from Advanced EMC Technologies:
PTFE Spring-Energized Seal Design
When designing a component that includes a spring-energized PTFE seal, it’s not enough just to specify all the seal parameters; another key part of the design is the surface finish of the mating surface. In this article, we are going to review what surface finish is, discuss the effects of surface finish on seal life, and then go over recommended surface finishes for spring-energized PTFE seals.
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