Description PTFE Envelope Gasket with core material of flexible materials (Asbestos; non-asbestos; rubber, etc.), which is wrapped by PTFE. Typical Applications It is mainly used as a gasket for tower, groove and all kinds of equipments of strong acid, halogen corrosive liquids or anti-contaminated food flanges. It is widely used in the chemical, petrochemical, pharmaceutical and food industries. Styles SUNWELL 1320Y: This is one of the most frequently used and economic types. It applies to use in every kind of occasion with lower temperature and lower pressure. Insert materials can be used by customers request. SUNWELL 1320UR: It applies to with large dimension gaskets which are used in the chemicals with poison. SUNWELL 1320UE: This type is used with the thick material embedded, it can reduce the innder flanges residue. Specification Temperature: -100~260oC Max. Pressure: 50bar Compressibility: >/=20% Recovery: >/=30% Stress release: =45% Leakage rate: =1x10-3 cm3/s More informations, please click the "PDF" download or contact with us.