Reasons for gasket damage of plate heat exchanger

10-05-2021

Plate heat exchanger is a kind of efficient heat exchange equipment. Compared with other heat exchange equipment, plate heat exchanger has high heat exchange coefficient, less heat loss, small footprint, compact and lightweight structure, convenient maintenance and cleaning, long service life, etc. Features. Of course, the plate heat exchanger is not perfect, and it also has its own shortcomings or limitations. For example, the pressure cannot exceed 2.5Mpa; the temperature cannot exceed 200 degrees Celsius; it cannot be used for extremely corrosive conditions; it is easy to block.

Today we mainly understand one of the most common problems of plate heat exchangers: the heat exchanger gasket is damaged. The heat exchanger gasket is one of the important components of the plate heat exchanger, and it mainly serves as a seal between the heat exchanger plates. If the heat exchanger gasket is damaged, leakage will occur, which will affect the normal operation and safety of the equipment. There are probably three reasons for the damage of the heat exchanger gasket: pressure, temperature and time. Let's take a look at the specific situation together.

1. Pressure: Within the rated working pressure range, abnormal impact load appears in the system, and the instantaneous pressure peak caused by the impact is often about 2 times higher than the normal working pressure, which makes the heat exchanger rubber installed in the plate heat exchanger The displacement of the gasket makes the plate heat exchanger seal failure.

2. The rapid change of temperature can also cause the heat exchanger gasket to fail. When the temperature changes rapidly, the linear expansion coefficient and elastic deformation of the rubber gasket of the heat exchanger and the compact pre-tightening force will not match, so that the sealing pre-tension will not match. The reduced tightness results in the pressure bearing capacity of the plate heat exchanger device being much lower than the rated design pressure.

3. Time: For plate heat exchanger equipment that has been used for too long or has been idle for too long, the heat exchanger sealing material itself will age, which will affect the reliability of the seal, so the maintenance opportunity should be used to replace the new heat exchanger seal Gasket.

The above is the relevant introduction about the damage of the gasket of the plate heat exchanger. I hope it can help everyone to better understand the equipment. Pay attention to us, and we will continue to share more knowledge about plate heat exchangers with you in the future.

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