Attention should be paid to the selection of sealing gaskets for plate heat exchangers
The selection of the plate heat exchangers sealing gasket has an important influence on the service life of the heat exchanger. If the sealing gasket is hardened or loses its due ductility, it is likely to cause the equipment to fail to function properly. operation, or leakage; because the gasket not only seals the medium, does not allow the medium to leak in the external natural environment, but also needs to avoid the phenomenon of mutual mixing between the medium, so the gasket is considered to be a Important components in heat exchange equipment. When choosing, consider the following:
1 Expansion: The raw material of plate heat exchanger sealing gasket is generally plastic material. When the extrusion deformation subsides, it can be restored to its original appearance. In other words, the volume of the gasket will not change during the whole process of shrinking the gasket. size is indicated.
2. Compressive strength: It should have sufficient compressive strength to allow it to enter the pressing force of the sealed state and withstand high fluid media.
3. Extensibility: It can not only meet the specified application compressive strength, but also have ductility, so that the gasket can closely meet the plate under sufficient working pressure to achieve sealing performance.
4 Anti-water permeability: that is, the performance of medium resistance, which can resist the infiltration of different media.
5. Temperature resistance: When purchasing, we must master the temperature area of the gasket, and select the gasket with the appropriate working conditions and temperature according to the temperature requirements of its application, or according to the needs of the working conditions, to prevent its service life from being affected. Influence.
Another point is the service life: the service life is a point that everyone is very concerned about, which is related to the raw materials of the plate heat exchanger gasket and the whole process of application. The effect of the heat exchanger will be reduced, and when the airtightness is less than the actual operating pressure of the heat exchanger, it is difficult to avoid leakage.