1. Pressure effect: The ability to disassemble the plate heat exchanger when it is used at the rated working pressure. In addition to the quality factors of the device in the manufacture and assembly, it is generally related to the abnormal impact load in the system. This is It is not easy for ordinary operators to check the situation. The instantaneous pressure peak caused by the impact is often about 2 times higher than the normal working pressure, which displaces the rubber seal installed in the plate heat exchanger, making the plate heat exchanger seal invalid because The heat transfer element of this type of device is produced using stainless steel thin plate. Its sealing rigidity is relatively poor, and the periphery of the seal is very long, so the impact resistance performance is lower than that of the shell and tube heat exchanger.

2. Time impact: For the equipment that has been used or left idle for several years, the self-aging of the sealing material may affect the reliability of the seal, so the maintenance opportunity should be used to replace the new sealing gasket in time.

3. Effect of temperature: rapid temperature change can also lead to seal failure. When the temperature changes rapidly, the linear expansion coefficient and elastic deformation of the rubber seal and the preload of the seal will not match, which reduces the preload of the seal. , Resulting in the device pressure bearing much lower than the rated design pressure.

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