Magnetic pumps are widely used in various industrial scenarios due to their leak-free advantage. However, demagnetization often occurs during long-term operation, which not only affects the normal operation of the equipment but also may pose the risk of production interruption. Understanding the common causes of demagnetization and mastering the corresponding solutions are crucial for ensuring the stable operation of magnetic pumps.
The magnetic rotor of a magnetic pump is relatively sensitive to temperature. If the temperature of the operating environment is too high, exceeding the tolerance range of the magnet, the magnetic performance will gradually decay. This usually results from failures in the equipment's heat dissipation system, or the high temperature of the working medium itself without effective cooling measures, leaving the magnet in a high-temperature environment for a long time.
When the conveyed medium contains a large amount of impurities or particles, it is easy to cause jamming of the impeller inside the pump. This jamming will lead to relative sliding between the magnetic rotor and the impeller, causing frictional heat generation and thus increasing the temperature of the magnet. At the same time, frequent fluctuations in the medium flow rate will also increase the load on the magnet and accelerate the demagnetization process.
During the equipment start-up phase, if the exhaust operation is not performed in accordance with the procedures, cavitation is likely to form inside the pump, resulting in uneven force on the magnetic rotor. In addition, long-term operation under working conditions that exceed the rated parameters will keep the magnet in a high-load state for a long time, gradually losing its magnetism.
If phenomena such as a drop in output pressure and a decrease in flow rate occur during the operation of the equipment, these may be early signs of demagnetization. At the same time, if the pump body heats up abnormally or is accompanied by abnormal noise, it is necessary to be alert to the problem of magnet performance decay.
Regularly detect the operating parameters of the magnetic pump and compare them with the initial operating data. If the current increases significantly while the efficiency decreases under the same working conditions, it may indicate that the magnetism of the magnet has weakened, and further inspection and confirmation are required.
Regularly inspect the heat dissipation system to ensure the normal operation of the cooling device. For high-temperature media, cooling jackets or heat exchangers can be installed to reduce the temperature of the magnet's working environment. At the same time, strengthen temperature monitoring, set up temperature alarm devices, and promptly detect and handle abnormal temperatures.
Install filtering devices at the inlet of the pump to reduce the content of impurities in the medium. Reasonably adjust the pipeline design to avoid severe fluctuations in flow rate and maintain stable medium conveyance. Regularly clean the impeller and flow channel inside the pump to prevent jamming caused by impurity accumulation.
Ensure that the pump is fully exhausted before start-up to avoid cavitation. Reasonably adjust the operating conditions according to the rated parameters of the equipment to avoid long-term overload operation. Regularly train operators to strengthen the awareness of standardized operations.
Combine with the equipment shutdown maintenance to conduct a visual inspection of the magnetic rotor, checking for abnormal conditions such as discoloration and cracks. If necessary, use professional instruments to detect the magnetic strength of the magnet and promptly identify potential problems.
Record the time, content, and equipment operating status of each maintenance, and analyze the potential laws related to demagnetization. Based on the equipment usage frequency and working condition characteristics, formulate personalized maintenance cycles and content to avoid demagnetization risks in advance.
This article analyzes the three main causes of demagnetization in magnetic pumps, early identification methods, solutions, and prevention key points, providing key guidance for enterprises to avoid production interruptions and equipment losses caused by demagnetization. TEFFIKO magnetic pumps are precisely optimized for the main causes of demagnetization, with comprehensive enhanced designs from temperature protection to medium adaptation, which can fundamentally significantly reduce the risk of demagnetization. At the same time, TEFFIKO also provides customers with exclusive customized maintenance plans based on the maintenance key points mentioned in this article. For enterprises that value stable equipment operation and pursue high production efficiency, choosing TEFFIKO means choosing a reliable solution for demagnetization problems and a strong guarantee for continuous production.
