Plate heat exchanger is a kind of heat exchange equipment, which is widely used. Its core components are sealant pad and plate. Plate heat exchanger gasket is one of the important parts of plate heat exchanger. It is a kind of ring which can produce plastic deformation and has certain strength. So what is the cause of plate heat exchanger gasket seal failure?
1. Time effect
For the equipment that has been used or idle for several years, the aging of the sealing material may affect the sealing reliability, so the maintenance opportunity should be used to replace the new sealing gasket in time.
2. Temperature effect:
The rapid change of temperature can also lead to seal failure. When the temperature changes rapidly, the linear expansion coefficient, elastic deformation and sealing preload of the rubber gasket will not match, which will reduce the sealing preload and cause the pressure bearing capacity of the device to be much lower than the rated design pressure.
3. Pressure effect:
The leakage of the removable plate heat exchanger when it is used in the rated working pressure, in addition to the quality factors of the device in the manufacturing and assembly, is generally related to the abnormal impact load in the system, which 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 makes the installation on the plate The rubber gasket in the plate heat exchanger is displaced, which makes the plate heat exchanger seal failure. Because the heat transfer elements of this kind of device are 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.
The above three factors are the main causes of seal failure. Most of the gaskets are cut from non-metallic plates, or made by professional factories according to the specified size, and the materials are asbestos rubber plate, asbestos plate, polyethylene plate, etc.; in case of sealing failure, the causes should be found out as soon as possible to solve the problem, so as to avoid unnecessary losses.
Qingdao Ruipute Heat Exchange Equipment Manufacturing Co., Ltd. is a new energy-saving high-tech enterprise specializing in R &D ,design, production and manufacturing, installation and commissioning, and technical services of high-efficiency and energy-saving heat exchangers. If you have the problem about the plate heat exchanger gasket seal failure, you are welcomed to visit us for consultation.
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