FEP Encapsulated O-Ring / PFA Encapsulated O-Ring
With an elastomer core and a jacket of Teflon® fluoropolymer, FEP encapsulated O-ring combine the excellent chemical resistance of PTFE with the elastic behavior of an elastomer. The core is either FKM, Silicone or Stainless Steel. The jacket is FEP or PFA.
FEP encapsulated O-ring is a top choice when a standard O-ring has inadequate chemical resistance for an application and or when a solid PTFE O-ring does not have the elasticity for reliable, long term fluid sealing.
They are often recommended where chemical resistance and or hygiene is required.
Typical applications for encapsulated o-ring include:
Materials for encapsulated o-ring include:
Silicone Core- Lowest Cost, Most Readily Available
Hollow Silicone Core- Less Force Required to Compress
FKM Core- Greater Chemical Resistance and Compression Set Resistance
Steel Spring Core- Cryogenic Sealing Applications
Why consider encapsulated o-ring
Very good resistance to nearly all media (exceptions are alkali metals and some fluorine compounds)
Applications in broad range of temperatures
Superbly suited for use in the food, chemical and pharmaceutical industries
Low coefficient of friction prevents the stick-slip effect
Cost-effective, high-performance seal for many critical application areas
Characteristics of FEP and PFA
FEP and PFA are very similar in their characteristics. PFA stands out for its greater thermal resistance at temperatures exceeding 200 °C.
Advantages of FEP encapsulation
High resistance to numerous chemicals
High corrosion resistance
Low compression set
Low coefficient of friction
Advantages of PFA encapsulation
All the benefits of FEP encapsulation
Greater temperature resistance
Greater mechanical strength
Longer service life
Greater cracking resistance
FEP Encapsulated Gasket – Camlock Seal
This type of FEP Encapsulated Gasket in sections of square and rectangular design is applied for cam lock coupling. Following shows the standard sizes for this type of camlock gasket.
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