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Why the sealing gasket of plate heat exchanger loses its sealing effect
Release time:
2022-07-01
Three factors are the main reasons for the sealing gasket failure of the plate heat exchanger. When the sealing failure occurs, the causes should be identified as soon as possible to solve the problem and avoid unnecessary losses.
The sealing gasket of plate heat exchanger is a very effective heat exchange equipment, which is widely used. The core components of the sealing gasket of plate heat exchanger are the plate heat exchanger plate and sealing rubber. The development level of the sealing gasket of plate heat exchanger directly determines the development level of the plate heat exchanger. The sealing failure of the sealing gasket of plate heat exchanger is an important production failure. What causes the sealing failure of plate heat exchanger? To sum up, it mainly includes the influence of pressure, temperature and time. Now let's understand why the sealing gasket of the lower plate heat exchanger loses its sealing effect!
1. Impact of pressure
When the removable plate heat exchanger is used under the rated working pressure, it will leak, which is generally related to the abnormal impact load generated in the system, in addition to the quality factors of the device manufacturing assembly surface. This is not easy for ordinary operators to see. The instantaneous pressure peak caused by impact is always about 2 times higher than the normal working pressure, which causes the displacement of the rubber pad installed in the plate heat exchanger and disables the sealing of the plate heat exchanger. Because the heat transfer element of this device is made of stainless steel sheet, the sealing rigidity is relatively poor, and the sealing perimeter is very long, and the impact resistance is lower than that of shell-and-tube heat exchanger.
2. Impact of time
Or use the equipment that has been placed for several years, and the aging of the sealing material may affect the reliability of the seal. Please use the opportunity of inspection to replace the seal immediately.
3. Temperature effect
The sharp change of temperature will also lead to seal failure. When the temperature changes rapidly, the linear expansion coefficient of the sealing gasket of the plate heat exchanger is inconsistent with the elastic deformation and the seal preload, the seal preload decreases, and the pressure bearing capacity of the device is significantly lower than the rated design pressure.
In the process industry equipment, the plate heat exchanger is a kind of equipment with high safety requirements. The leakage can be seen after the sealing gasket is damaged. The plate heat exchanger will produce a small amount of liquid drops. In the process equipment with large pressure impact, large liquid leakage may occur due to the damage of the sealing gasket. Under strong pressure impact, the gasket can be removed from the correct installation position of the plate heat exchanger, or even from the heat exchanger in serious cases. In this case, please stop the equipment immediately and cool the heat exchanger to room temperature without pressure. When the gasket is deformed under pressure impact, it cannot return to its original shape and position, so it is necessary to replace it with a new gasket. If there is no spare gasket, remove the base plates on both sides of the damaged gasket from the entire plate heat exchanger group, and check the sealing gasket joint surface of the remaining plate heat exchangers. Pull out the damaged rubber pad for assembly. The plate heat exchanger unit will then purchase a new plate heat exchanger rubber pad and add a pad to achieve the original heat exchange capacity. Please pay attention to the value a, namely the clamping dimension, during the disassembly and assembly of the sealing gasket of the plate heat exchanger.
Three factors are the main reasons for the sealing gasket failure of the plate heat exchanger. When the sealing failure occurs, the causes should be identified as soon as possible to solve the problem and avoid unnecessary losses.
The above is why the rubber gasket of plate heat exchanger loses its sealing effect. For more information, please contact us at any time!
