Gaskets for plate heat exchangers is one of the important parts of the plate heat exchanger, a can produce plastic deformation, and a certain intensity of material has a ring. Most of the gasket is from non metal plate cutting down, or by professional plant according to the size of the provisions made, the material for asbestos rubber sheet, asbestos board, polyethylene plate; also useful thin metal plate (galvanized iron sheet, stainless steel) will be asbestos nonmetal material wrapped up made of metal gasket; and a with thin steel strip and asbestos band together winding and winding gasket. Ordinary rubber gasket for temperature lower than 120 DEG C; asbestos rubber gasket are applicable to the water vapor temperature below 450 DEG C, the oil temperature below 350 DEG C, the pressure is 5MPa below the occasion, for general corrosive medium, the most commonly used is acid asbestos board. In the high pressure equipment and piping, the use of copper, aluminum, stainless steel, 10, made of a lens type or other shape of the metal gasket. The contact width of the high pressure gasket and the sealing surface is very narrow (line contact), and the sealing surface and the gasket are highly polished.