Plate Heat exchanger manufacturer, industry solution expert

Causes of damage to the gasket of the plate heat exchanger and repair methods_

by:DIGUANG     2021-03-31
Causes of damage to the gaskets of plate heat exchangers and maintenance methods

2019-08-12 11:33
1026 In the process of using plate heat exchangers, we often find that the sealing gasket is damaged and invalid, which directly causes the equipment to fail to operate normally. Do you know what causes the failure of the gasket of the plate heat exchanger? The editor of Diguang Heat Transfer Technology Co., Ltd. will tell you the reasons for the damage to the gasket of the plate heat exchanger and the corresponding repair and treatment methods. Everyone knows that the plate heat exchanger is a very efficient heat exchange device, and it is also widely used in social industries. However, heat exchangers are generally composed of plates and sealing gaskets. However, in the process of use, the sealing rubber gasket often fails. So what caused this to happen? It may be affected by pressure, and when the plate heat exchanger can be disassembled and used in the rated working pressure, leakage occurs. In addition to the quality factors of the device in the manufacturing and assembly, it is generally related to the abnormal impact load in the system. This is a situation that is not easy for ordinary operators to check. The instantaneous pressure peak caused by the impact is often about 2 times higher than the normal working pressure, which displaces the rubber gasket installed in the plate heat exchanger and makes the plate heat exchanger seal failure. Because the heat transfer element of this type of device is made of stainless steel sheet, its sealing rigidity is relatively poor, and the sealing periphery is very long, so the impact resistance performance is lower than that of the shell-and-tube heat exchanger. It is also possible that the equipment used or idle for several years may be affected by time. The aging of the sealing material may affect the reliability of the sealing. Therefore, the maintenance opportunity should be used to replace the new sealing gasket in time. Another possibility is that it is affected by temperature. Rapid changes in temperature can also cause seal failure. When the temperature changes quickly, the linear expansion coefficient and elastic deformation of the rubber gasket and the seal pre-tightening force will not match, making the seal The pre-tightening force is reduced, resulting in the pressure bearing capacity of the device much lower than the rated design pressure. The above is an introduction to the common causes of damage to the gaskets of plate heat exchangers and the corresponding maintenance methods. I hope to help more users to do the maintenance work! For more information on the repair of plate heat exchanger rubber pads, please pay attention to the official website of Diguang!
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