"tothepoint" commented on two companies manufacturing "anti-buckling" gaskets. I did a little research and have found out that Garlock calls their's the "EDGE Gasket"; I haven't been able to learn anything about the Teadit gasket, but will keep researching.
All standard spiral wound gaskets, without inner rings buckle! PTFE spiral wounds actually buckle the most because of the extremely low coeff of friction and the uncompressible nature of PTFE. ASME now dictates the use of inner rings in all PTFE spiral wound gaskets as well as many other...
The phenomenon you're seeing is called radial buckling and it happens with all spiral wound gaskets because the sealing surface thickness is .175" thick and the centering or guage ring is .125" thick. When you compress the gasket the windings have to go someplace and they protrude to the ID...
