FEP – PFA encapsulated O-rings
Manufactures Cusell
Encapsulated O-rings
- As the name indicates, these O-rings have a core of one material, encapsulated by another. The core is generally either silicone or PTFE and the skin usually either FEP or PFA.
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Thanks to the fluorated PTFE skin, the encapsulated seal offers a superb chemical resistance and the core material ideal sealing properties, contrary to the conventional elastomeric O-ring or the non-flexible PTFE ring.
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The encapsulated seals have very low gas permeability as well as a very low friction coefficient. With a FEP skin the Seals can work at up to 200ºC and with PFA skin up to 250ºC.
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For any application with high pressure or temperature we recommend using PFA encapsulated seals.
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The encapsulated O-rings are designed to the same dimensional grooves as traditional O-rings, however some tools may be needed during installation due to the outer skin as the seals are not as flexible as the traditional O-rings.
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For use with food stuffs and pharmaceutical godos, the Seals can be manufactured with FDA approval.
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Unlike most other manufactuers, we can produce the encasulated Seals with an NBR core. We also have square and rectangular core materials.
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For cryogenic and other extreme ambient, we can solve sealing problems with an encapsulated stainless steel spiral, a seal capable of working at temperatures of down to -250ºC. These seals can be manufactured from inside diameters of 12.7mm and up and we can quote 20 different thicknesses.
