Graphonic and Tephonic Gaskets
The Graphonic gasket is a metallic corrugated core with a compressible outer sealing element of various materials. The advantage to this type of gasket is it's resistance to high temperature, thermal cycling and corrosive environments, all at a competitive cost.
This gasket is API and FITT fire-safe tested and approved.
The Tephonic gasket contains the same core with an expanded Teflon outer in order to seal under less bolt-torque load and can withstand temperatures up to 500 degrees.