I have about 40 tri clover conections on my rig, that is not quite complete. It is all hard piped with 316L stainless. I already have about 20 PTFE gaskets that i have been using for mock up, but there are many different types of gaskets available PTFE, BUNA, Platinum Silicone, EPDM, Tuf-steel etc. etc. My question is what is the best material for the application? I am sure some of them are more flexible than others, some are more expencive than others, they are all food safe. and all fit within the temp range we deal with, I just need some opinions before i place an order. Thanks for the help.