Five Benefits of Spring-Energized PTFE Seals
Elastomeric seals have potential disadvantages: chemical attack, swelling, degradation, heat aging, compression set, and high friction. However, the addition of a spring and the careful selection of an elastomer can virtually eliminate many of these problems.
Spring-energized seals have a U-shaped groove in which a corrosion-resistant metal spring (usually made of stainless steel) is placed. Once the seal is seated in the gland, the spring is compressed and applies a force on the gland that seals the surfaces. This creates a tight barrier to prevent leakage of gas or fluids. A common material used with spring-energized seals is Polytetrafluoroethylene, referred to as PTFE or Teflon. This polymer further enhances the properties of spring-energized seals. In fact, there are five specific benefits to energized PTFE seals!