Due to the expanding application of plate heat exchangers, different temperatures, pressures and corrosion resistances are required for different media and processes. It is obviously impossible to use a "universal" gasket to adapt to all situations. Different kind of materials should be used for different situations. Commonly used gasket cross-sectional shapes are six-sided rows. Commonly used types of gaskets include natural rubber, neoprene, EPDM rubber, silicone rubber and fluoro rubber. It should be replaced in time if the gasket of the plate heat exchanger is leaking, broken and aging.(1) Remove the used gasket. Be careful not to scratch the gasket groove when disassembling.(2) Remove the residual glue in the gasket tank with acetone, methyl ethyl ketone or other ketone solvent.(3) Clean the gasket groove and gasket with a clean cloth or cotton yarn.(4) Apply the adhesive evenly to the gasket groove.(5) Attach a clean new gasket to the board.(5) The slabs with gaskets should be placed in a flat, cool, ventilated place to be naturally dry and then installed.