Temporary treatment of plate heat exchanger gasket aging

Temporary treatment of plate heat exchanger gasket aging


Is the pad of the plate heat exchanger aging the temporary remedy?
The softening of the elastic gasket is related to the pressure and the temperature. When the gasket loses its elasticity, the plate heat exchanger may drip. In some products, in order to solve the phenomenon caused by the aging of the gasket, allowing the heat exchanger to adjust the sealing performance, that is, once again tighten the combination of plate heat exchanger bolts, adjust the heat exchanger between the elastic gasket The pressure to solve the problem of dripping. In the nameplate of the heat exchanger with this function, the maximum and minimum stresses are generally given. For the new heat exchanger wafer set, the minimum allowable stress should be used for connection fixation. Depending on the number of heat exchangers in each group, the tightening force of the heat exchanger can be adjusted one or more times. Each time the screw is tightened, the nut can be screwed into 3mm and the stress of the tab is always observed during the tightening process. , Only allow the heat exchanger without working pressure, at room temperature under the tightening force to adjust to prevent dripping.
For plate heat exchangers that do not give a stress adjustment range on the nameplate, the stress values ​​are generally given in the part drawing. When tightening this type of plate heat exchanger, the tightening torque should not be below the values ​​specified in the drawings, Because it is with the plate heat exchanger assembly quality, assembly deformation. When the tightening torque reaches the specified value, the elastomeric gasket may be replaced in a planned manner. For a plate heat exchanger used in important production equipment and in corrosive media, it is advisable to have a spare seal. Warehouse temperature 18 ℃, in the transparent plastic packaging, the plate heat exchanger seal can be stored for 3 years or so.

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