1. Insufficient flow head.
The reasons for this failure are: there is air in the conveying medium, the impeller is damaged, the rotation speed is not enough, the specific gravity of the conveying liquid is too large, the flow rate is too large; the lift is too high, and there are debris in the pipe blocked.
2. The pump can't pump out the liquid.
The failure of the pump to pump liquid is a fault that is prone to occur in the pump, and there are many reasons for it. First of all, check whether there is air leakage in the suction pipe of the pump, check whether the air in the suction pipe is discharged, whether the amount of liquid poured into the pump is sufficient, whether there is debris in the suction pipe, and also check whether the pump is reversed ( Especially after the motor is replaced or the power supply line is overhauled), you should also pay attention to whether the suction height of the pump is too high. If the above inspection still cannot be solved, the pump can be disassembled and checked to see if the pump shaft is broken. It should also be checked whether the dynamic and static rings of the pump are in good condition, and whether the entire rotor can move axially in a small amount. If axial movement is difficult, check whether the carbon bearing is too tightly combined with the pump shaft.
3. The pump shaft is broken.
The material used for the pump shaft of the CQB type magnetic pump is 99% alumina porcelain. The main reason for the breakage of the pump shaft is that the shaft is twisted and broken due to the dry running of the pump and the dry grinding of the bearing. When the pump is disassembled and inspected, it can be seen that the bearing has been seriously worn. The main method to prevent the pump from breaking is to avoid the dry running of the pump.
4. The bearing is damaged.
The material used for the bearing of the CQB magnetic pump is high-density carbon. If the pump is cut off or there are impurities in the pump, the bearing will be damaged. If the coaxiality requirement between the inner and outer magnetic rotors of the cylindrical coupling is not guaranteed, it will directly affect the life of the bearing.
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