What makes magnetic multi-stage pumps difficult?
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The head is around 300 meters, and the flow rate is about 24 cubic meters; however, several domestic manufacturers of magnetic pumps said that they are not capable of handling such conditions. I heard before that magnetic pump systems cannot handle very high power levels. I did some calculations myself, and the shaft power is only around 70 kilowatts. Why is that? What makes magnetic multi-stage pumps difficult?
The challenge lies in torque transmission, as magnetic couplings represent a flexible method of transfer. Demagnetization occurs if the torque is too high. Moreover, when the power is high, the volumes of both the inner and outer magnets increase significantly, resulting in reduced efficiency. Magnetic pump models with this parameter can be found from Klaus, but they are very expensive.