Excellent guide to understanding and applying O rings.
While this is a particular supplier's catalogue it goes far beyond that.

        http://www.engineeringplastics.co.nz/seals/oring-c.pdf

- Design guide including temperature, pressure, surface, materials,
extrusion, and more.
- Temperature ranges for various ring polymers.
- Table of materials recommended form a vast range of fluids
(As diverse as beet sugar liquors and butter to CO2, Diethylamine, LOX, JPx,
N2O4 and Whiskey)
- Conversion factors
- Glossary


_________________

ref from Ken Mardle

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.