The fixing of stainless steel plate heat exchanger seals is divided into adhesive and non-adhesive. The shape of the gasket should be consistent with the shape of the seal of the plate heat exchanger. The adhesive fixing method does not have any effect on the sealing function. But the glue may cause some corrosion to the plate. The corresponding parts of the non-adhesive gasket and the plate have a special structural shape. The two are mechanically connected and can be roughly divided into "embedded" and "clip-on" types. Time and labor are saved by 80% and 70% compared to sticky gaskets, and maintenance costs and downtime losses are greatly reduced.The softening of the elastic gasket is related to pressure and temperature. When the gasket loses its elasticity, the heat exchanger will leak. In order to solve the dripping phenomenon caused by the aging of the gasket, the plate heat exchanger allows the sealing performance of the heat exchanger to be adjusted. That is, the bolts of the combined plate heat exchanger are tightened again, and the pressing force of the elastic gasket between each heat exchanger is adjusted to solve the problem of dripping.