Minimum liquid handling volume of magnetic centrifugal pumps
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Dear sea friends, we have a magnetic centrifugal pump here that is used to pump a liquid consisting of about 50% sulfuric acid. The design specification for this pump indicates that its minimum flow rate is 1.2 m3/h; at present we keep the flow rate at 0.8–0.9 m3/h. I would like to know what effects long-term operation of this pump might have on it
It is easy for the medium inside the magnetic pump to become heated due to mixing, yet this heat cannot be dissipated. As the temperature of the medium rises, the fluid flowing within the self-circulation loop is already at a higher temperature, which reduces the cooling effect on the isolation sleeve and the magnetic rotor. Over time, this leads to demagnetization of the magnetic rotor
Under normal conditions, there is no problem as long as the flow rate is not less than 30% of the rated flow rate. An increase in temperature can cause demagnetization.