Can a magnetic pump be reversed?

With all pumps, if the wires are connected in reverse, they will rotate in the opposite direction. But when they rotate in that direction, they can no longer transport material at all. As for the pump itself, there shouldn’t be any major impact, right?

Magnetic pump is generally a centrifugal pump, and centrifugal pumps must not be operated in reverse; doing so can easily cause the impeller nut to loosen. This causes the impeller to displace itself from the main shaft. It causes failures in the pump.

Magnetic pumps are designed to be reversed in operation

Magnetic pumps cannot be operated in reverse, as the lubrication channels of the bearings have a specific direction; they must face the discharge outlet, and the material must flow into these channels while the pump is running. The direction of rotation is indicated on the pump bearing housing; generally, it rotates clockwise when viewed from the drive side.

None of the answers from above mentioned qualitative aspects; I specialize in the design of magnetic pumps. Magnetic pump is different from ordinary mechanical seal pumps; reversing it is absolutely not allowed. The reason is that when the pump operates in reverse, it is unable to draw in fluid; magnetic pumps are generally designed with an internal circulation system to remove the heat generated by the magnetic rotor. If fluid cannot be drawn in in reverse mode, it becomes impossible to dissipate the heat produced by the magnetic rotor, causing its temperature to rise rapidly and leading to demagnetization of the rotor. This demagnetization occurs very quickly – usually, the rotor becomes unusable within 2 minutes.

Thank you for the advice. The reasons I mentioned are also conclusions drawn after consulting pump design manufacturers, and they should represent one aspect of the issue. Other reasons cannot be ruled out.

I specialize in the design of magnetic pumps; you can add me on QQ at 474380463 to discuss matters together and improve our skills collectively.

It is strictly prohibited to run a magnetic pump at idle or in reverse. If there are anti-loosening washers in the design, it’s not a big problem to run it in reverse; however, if no such washers are present, reversing the nut will cause it to loosen, leading to damage to the pump. Therefore, running the pump at idle is generally not allowed.

1. Magnetic pump generally belongs to the category of centrifugal pumps, and centrifugal pumps must not be operated in reverse. 2. Magnetic pumps are different from ordinary centrifugal pumps; it is absolutely not allowed for them to be operated in reverse. The reason is that when the pump operates in reverse, it is unable to deliver sufficient flow. Magnetic pumps are generally designed with an internal circulation system to remove the eddy current heat generated by the magnetic rotor; without sufficient flow in reverse mode, it becomes impossible to dissipate this heat, causing the rotor’s temperature to rise rapidly and leading to demagnetization of the magnetic rotor. This demagnetization occurs very quickly – usually, the rotor becomes unusable within 2 minutes. High-temperature demagnetization is permanent and irreversible. 3. We have encountered demagnetization issues before, so the check valve needs to be reliable.