PTFE (polytetrafluoroethylene)

PTFE (also known as Teflon®) is considered the industry standard (for valves) for soft sealing components due to its almost universal chemical resistance and its low coefficient of friction. It also happens to have some fantastic characteristics:

  Almost totally unaffected by chemicals encountered in commercial use.

 Flame resistant

  Heat resistant – retains its properties after exposure to temperatures beyond the limit of almost all other thermoplastics & elastomers.

  Low coefficient of friction

  Chemically pure and inert

  Low surface energy in the solid state

  Retains its excellent properties even at cryogenic temperatures

  Excellent chemical resistance over broad temperature range

  Excellent retention of properties after a long period of time

  Has light stability – does not change appearance after exposure to UV or infrared

  Stable dielectric properties

  Inert to microbiological and enzymic attack

  Completely resistant to hydrolysis – good barrier for water permeation, even after long periods in water