o-rings and seals

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Viton™ Consists of Three Families of Polymers

Viton Consists of Families of Polymers

Viton™ Family Product Types Principal End Users Polymer Composition Weight % Fluorine
A A, AL General purpose sealing: Automotive, Aerospace fuels & lubricants Dipolymers of VF2/HFP ~67%
B B, BL Chemical Process plant, Power Utility Seals & Gaskets Terpolymers of VF2/HFP/TFE ~68%
F F Oxygenated Automotive fuels. Concentrated aqueous inorganic acids, water, steam Terpolymers of VF2/HFP/TFE ~69%

The three families differ primarily in the end-use performance of the parts made from Viton™. Each family differs in its ability to: resist permeation and volume increase, resist attack and property degradation caused by the chemicals and fluids.

Speciality versions of A, B & F types are available in which HFP is replaced with a speciality monomer to improve low temperature flexibility.

The choice of the most appropriate family of Viton™ to use for any given end-use application will be determined by the end-use service, and in particular, whether the finished part must provide:

  • Resistance to amines or caustics
  • Resistance to hydrocarbon fluids
  • Flexibility at low temperature (ability to maintain a seal at low temperature)

The end-use performance capability of the various families of Viton™ differ primarily in terms of these three factors.

Next: Comparison of Grades of Viton™

 

 

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