PTFE Gasket.MATERIALS ADOPTED: PTFE powder and PTFE plank; Metal Gasket.Wave-tooth Composite GasketMATERIALS ADOPTED: 1Cr18Ni9, 304, 316, 317L, Monel ... flanges, floating head heat exchanger, condenser, pump, pressure vessel and sealing equipment with strong corrosion;SPECUFICATIONS AVAILABLE: DN10~1500mm; PTFE Gasket