Having worked on magnetic pumps for so many years, I’d like to share with you a question that customers often ask

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To prevent demagnetization of the magnets in magnetic pumps, we first need to analyze the reasons why demagnetization occurs. These reasons can be roughly divided into the following categories: 1. Unappropriate operating temperature. 2. Operation at low head for extended periods. 3. The pipeline layout is unreasonable. 4. The worn sliding bearing was not replaced in a timely manner. 5. The magnetic pump runs idle. 6. Blockage in the pump inlet and outlet pipelines. 7. Abnormal jamming of the rotor components. 8. Cavitation phenomenon. For the reasons mentioned above, it is clear that temperature is the main factor affecting the demagnetization of magnetic steel. As can be seen from the demagnetization curve of magnetic magnets, when the temperature exceeds 150°C, magnets made of ordinary neodymium-iron-boron materials will experience irreversible torsional loss ； When the temperature exceeds 250°C, magnets made of ordinary samarium-cobalt materials will experience irreversible torsional loss ； When the temperature exceeds 350°C, high-performance samarium-cobalt magnets will experience irreversible torsional loss.