Elastomeric, Rubber O-rings suffer from high friction and limited resistance to aggressive chemicals and gas permeation. Solid Teflon® O-rings are rigid with no effective memory and high compression set.
Our Teflon Encapsulated O-rings combine the resilience and sealing force of an elastomer with the chemical resistance of Teflon®. This is accomplished by the use of an elastomeric core of silicone or Viton®, with a relatively thin encapsulation of Teflon® FEP or PFA polymer. This produces an elastomeric PTFE seal with maximum sealing capability.
FEP Encapsulated O-rings are solvent resistant and chemically inert (except for attack by alkaline metals, fluorine and some halogenated compounds at high temperatures) yet have an elastomeric memory near that of rubber O-rings. FEP polymer, also, has an extremely low coefficient of friction (.1 to .2) and very low permeability to gases, making our Encapsulated O-rings virtually universal seal for use in hostile environments.
Broad Size Range:
Available in standard and metric sizes from .059” cross section x ½” I.D. to virtually unlimited larger sizes.
Outperforms solid PTFE O-Rings:
Our Encapsulated O-rings match the chemical and temperature resistance of solid PTFE O-rings.
Encapsulated O-rings possess properties of elasticity and recovery which are crucial in many sealing applications.
Encapsulated O-rings economically, and may effectively, replace exotic compounds wherever corrosive fluids and gases cause premature seal failure.
Non-Stick Surface :
Provides easy cleanup of viscous materials.
Eliminates contamination of fluids by elastomers. Sterilizable and autoclavable.
Outstanding Chemical Resistance :
Chemical attack and swelling are primary causes of O-ring failure. Encapsulated O-rings are virtually chemically inert.
Minimum compression set:
Core materials (Silicone or Viton®) provide optimum resilience vs. compatibility.