PTFEenvelope GasketPTB-85 consists of non-asbestosjoint gasket,expanded graphite gasket, etc. cushion material having exposed surface covered with PTFE envelope. Depends on excellent corrosion resistance and compression resilient. It is widely used in strong alkalis. Cryogenic fluids, oxygen, chlorine gas, and disallowable polluted medium, etc.   NO.   Cross section   Description PTB-85 (Y) Y Type,PTFE dise in center from out side. PTB-85(C) CType,PTFE tape heat sealed at one joint. PTB-85 (U) U Type,PTFE sheet mashine cut to envelope form service RangeCushioning Material   Cross section (℃)   Max Temperature (kgf/cm2)   pressure NON-Asbestos jointing gasket 20030Reinforced Graphite Gasket 26050Reinforced Gasket + SS316 corrugated gasket 26060