Temporary treatment method for plate heat exchanger gasket aging

Temporary treatment of plate heat exchanger gasket aging The softening of the elastic gasket is related to pressure and temperature. When the gasket loses its elasticity, the heat exchanger will leak. In some products, in order to deal with the leakage caused by the aging of the gasket, it is agreed that the heat exchanger should be adjusted for the sealing function, that is, the mechanical seal is used to tighten the bolts of the combined plate heat exchanger again, and the heat exchangers are adjusted. The pressing force of the elastic sealing gasket between, to deal with the problem of dripping. On the nameplate of the heat exchanger with this function, the maximum and minimum stresses are usually given. Regarding the new heat exchanger plate group, the minimum allowable stress should be used for connection and fixation. Depending on the number of heat exchanger plates in each group, the tightening force of the mechanical seal of the heat exchanger can be adjusted once or repeatedly. Each time the nut is tightened, the nut can be screwed into 3mm, and the stress of the conditioning plate can be paid attention to during the tightening process. Circumstances, moreover, only promised to adjust the tightening force at room temperature for heat exchangers without working pressure to avoid dripping. Regarding the plate heat exchanger that does not give the stress adjustment range on the nameplate, the stress value is usually given in the parts drawing. When tightening this type of plate heat exchanger, the tightening torque should not be lower than the value of the drawing rules in any case. Because it is related to the assembly quality and assembly deformation of the plate heat exchanger. When the tightening torque reaches the required value, the elastic gasket can be replaced in a planned way. Regarding the plate heat exchanger used in the main production equipment and corrosive media, it is advisable to have a set of spare seals. When the warehouse temperature is 18℃, the seals of the plate heat exchanger can be stored for 3 years in the transparent plastic packaging. Fixation of seals: In principle, the fixation of seals is divided into two categories: adhesive fixation and non-adhesive fixation. The shape of the gasket should be consistent with the shape of the seal of the plate heat exchanger. It must be pointed out that the adhesive fixing method does not have any effect on the sealing function.