... , with inner and outer rings, and gasket for heat exchange equipment; Metal Gasket.TYPES OF GASKET: Basic type, with inner ring, with ... outer ring, with inner and outer rings, and gasket for heat exchange equipment;MATERIALS ADOPTED: Skeleton and ring, A3 ... , C-276, and zirconium;Packing: expandable graphite, PTFE and asbestos;SERVICE TEMPERATURE: -200~870°C;SERVICE PRESSURE: 32Mpa;MAIN PURPOSES ...