Frequently Asked Questions
Our FAQ's page is updated periodically for new questions and issues - please visit this page for information or answers that might be of interest to you.
General FAQs
What is the difference between Teflon and FEP or PFA?
Teflon® is DuPont's trademark for its family of fluoropolymer resins which includes PTFE, FEP and PFA. The name is sometimes erroneously used to denote PTFE only. There are other brand names for these fluoropolymers (see our Properties page, for example). In addition to PTFE, FEP and PFA there are other fluoropolymers such as THV, PVDF, ETFE, ECTFE and CTFE
Do these materials perform differently?
These materials, although members of the same family, have slightly different thermal and mechanical properties. PTFE and PFA have a slightly higher upper use temperature than FEP. FEP and PFA are clear (PTFE is translucent), and have better mechanical properties than PTFE. For a detailed listing of the properties of these resins, please click on the Technical Data bar on the home page.
The other key differences are in the areas of chemical inertness, corrosion resistance, permeability, and FDA approval. Please see the Detailed Properties section by clicking on the Technical Data bar on the home page.
Tubing FAQs
What tubing materials are available from Fluorotherm?
At present, we produce PTFE, FEP, PFA, PVDF, and ETFE tubing.
What is the pressure rating on a specific size of tubing?
The pressure rating is a calculated value, using basic mechanical engineering formulas and the tensile or hoop strength. The pressure rating is dependent upon temperature of use. As with any tubing, the pressure rating falls with rising temperature. The smaller the tube size, the higher the pressure capability.