Viton® FAQ – Frequently Asked Questions
Viton® is a trade name for a fluoropolymer elastomer produced by Dupont Performance Elastomers. It is important to note that Viton® has become a generic reference within the Seals Industry, in much the same way as a vacuum cleaner is often called a hoover
There is. Viton A grade (66% fluorine content) is the most standard material from a stock-holding and general availability prospective. The material out of which the seals are produced generally, as a minimum, has to conform to certain industry standard criteria set out for that material classification. The criteria used is normally to requirements set out in ASTM D2000. One particular key attribute is its excellent compression set.
The upper limit is around 200 deg C, and can go higher in certain situations, but it depends on the actual application. Fairway Seals has its own in house technical team who will be happy to answer any queries you may have.
It is important to note that the information detailed above is only a guide. The responsibility is with the client to be sure that the product meets its required purpose via their own tests. Results from data sheets are usually based on tests of solid test buttons of a fixed size, shape and mass and tested in laboratories with controls maybe far different from those conducted elsewhere. The results on the component pieces will generally be considerably different to test piece results due to differing size, shape & mass.
There are many factors which result in reduction in seal life or failure, such as selecting wrong material, incorrect installation and so on. Elastomeric Science is an imprecise art, and all application criteria has to be considered in order to ensure the selected material has the best possible chance of success in the application.
Please note:, Sealing performance in service must also include considerations of other factors such as resistance to compression set, mechanical strength at service temperatures, seal design, and seal cost.