PTFE Envelope Gaskets

The materials commonly used in the field of industrial sealing (as rubber or non-asbestos with aramid fibre and elastomeric filler), usually doesn’t fit all the required standards of strength, width, chemical and mechanical resistance that certain application could require.

KAF-SEALS is a pioneer in the envelope gaskets industry and we have reached the highest quality standards, using innovative materials, advanced technologies and a qualified work force. Every type of gasket is studied and projected to fulfil the highest needs of a constantly evolving market.

THE PTFE EXTERNAL ENVELOPE

Commonly named “envelope”, it has the purpose of protecting the internal part of the gasket from the substances which they are in contact with; these envelop are mostly made of:

  • Virgin PTFE FLON-CHEM 1000;
  • Modified PTFE FLON-CHEM 1075;
  • Antistatic/Conductive PTFE FLON-CHEM 1022;
  • Modified/Antistatic/Conductive PTFE FLON-CHEM 1023;

All the enlisted materials are complying with the US law: FDA, Food and Drug Administration, department of Health and Human Services, Code of Federal Regulations 21 CFR Ch.1; USA regulations sections 177.1550 (a) (1) and (b) Perfluorocarbon Resins;

There is different type of envelop due to the applications and the customers desires, in case of big diameters and small quantities the cost could be too high so we could weld the sealing in one point.

The welding process are done to the “head” without overlapping the two PTFE parts; the perfect execution of the welding is ensured by using the correct parameters of temperature, pressure and time in activity of the part to be welded. Destructive and non-destructive trials are done frequently to homologate the welding process.

Note: For more details please contact: kafseals@live.in