How to evaluate the quality of a magnetic pump
Thread Content
I have been working on selecting magnetic pump suppliers recently, looking for companies that can provide qualified products. I would like to ask everyone how to determine the quality of magnetic pumps; let’s discuss this together. 1. Magnet material: Neodymium-iron-boron magnets are suitable as per what can be found online for use at room temperature; of course, samarium-cobalt magnets are even better. Additionally, samarium-cobalt magnets with a grade of 2.17 have superior performance compared to those with a grade of 1.5. 2. Magnet manufacturing process: I’ve learned that some manufacturers are able to remagnetize neodymium-iron-boron magnets. Is this remagnetization process superior to those magnets that come pre-magnetized from the start? Additionally, the uniformity of remagnetization is a concern. Are there any particular requirements regarding the manufacturing process for samarium-cobalt magnets? 3. Magnetic loss: I’ve learned that some manufacturers can provide data on magnetic loss, while others do not conduct such tests. Does this mean that magnetic loss is also an indicator to determine the quality of products produced by different manufacturers? 4. Hydraulic models: I know that Hydrac uses Sulzer or KSB hydraulic models; what models do domestic manufacturers generally use? Do they develop their own models? 5. Thickness of the isolation sleeve and welding process: If the isolation sleeve is too thin, it affects strength; if it’s too thick, it affects efficiency. I’m not sure how this balance is achieved. 6. Efficiency issue: I’m starting to doubt whether the efficiency figures provided by domestic manufacturers are accurate. Are percentages over 60% or 70% reliable? That’s all I can think of for now; I hope those who know more can share their insights
You’re professional; if we don’t talk a bit, who knows we might have a chance to work together
I’m still learning *. There are many things I only understand half of. To all my students*.
This post was last edited by ylb913 on 2016-12-9 at 19:22. The main concern is the risk of demagnetization without any apparent reason; we have also experienced issues with the isolation sleeves on several occasions, but in reality these were caused by fluctuations in the medium or in the operating conditions. We have several magnetic pumps, and one unit from a particular manufacturer lost its magnetism for no reason.
It was used in my previous workplace; magnetic stirring was also employed, and demagnetization was applied in the pump industry. My personal guess is that the temperature was too high
If demagnetization occurs without any reason, is it a problem with the quality of the magnet, or is it due to improper operation that caused overheating?