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Cheat Sheet on Surface Finishes and PTFE Spring-Energized Seals

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.

PTFE spring energized seals

 

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Why use a PTFE (Polytetrafluoroethylene) instead of Rubber in a Rotary Shaft Seal?

PTFE Rotary Shaft Seals Outperform Rubber Shaft Seals

Elastomeric seals performed well for many years, but as the applications and environments became more demanding, elastomers had a hard time keeping up.  If the application pressure is above 30 psi or the operating temperature goes above 275°F, elastomers simply don’t perform as well as, say, PTFE. (polytetrafluoroethylene).  In this article, we are going to look at 3 areas where PTFE rotary shaft seals outperform rubber shaft seals.

PTFE-rotary-shaft-seal-Advanced-EMC.jpg

 

 

Need more information on PTFE Rotary Shaft Seals? Check out these additional articles from the popular Advanced EMC Technologies Blog:

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