Common faults and solutions of magnetic pumps

Insufficient flow, insufficient head, damaged bearings, broken shafts, inability to extract liquid Common malfunctions of magnetic pumps during use include insufficient flow rate, insufficient head, damaged bearings, broken shafts, and inability to dispense liquid. The reasons and solutions for these faults are as follows:

Insufficient traffic

The main reasons for insufficient traffic include:

Impeller damage: Impeller wear or damage can cause a decrease in flow rate.
Insufficient speed: Insufficient motor speed will affect the flow rate.
Excessive head: Excessive head will increase resistance and reduce flow rate.
Blockage of debris in the pipeline: debris in the pipeline can block fluid flow.

Resolvent:

Check and replace the damaged impeller.
Ensure that the motor speed is normal.
Reduce the head or clean up debris in the pipeline.

Insufficient head

The main reasons for insufficient head include:

The medium contains air: air can affect the head.
Impeller damage: Impeller wear will reduce head.
Insufficient speed: Insufficient speed will affect the head.
The specific gravity of the conveyed liquid is too high: High specific gravity liquids require a higher head.
Excessive flow: Excessive flow will reduce the head.

Resolvent:

Remove air from the medium.
Check and replace the damaged impeller.
Ensure that the motor speed is normal.
Adjust the flow rate or use a more suitable liquid.

Bearing damage

The main reasons for bearing damage include:

Impurities in the pump: Impurities can cause bearing wear.
Pump water outage: Lack of water can cause dry wear of bearings.
The coaxiality issue between the inner and outer magnetic rotors of cylindrical couplings: coaxiality issues can affect the bearing life.

Resolvent:

Clean the impurities inside the pump.
Ensure that there is sufficient water in the pump.
Adjust the coaxiality of the coupling.

Shaft breakage

The main reasons for shaft breakage include:

Pump idle running: The idle running causes dry wear of the bearings, which in turn breaks the pump shaft.
Dry grinding of bearings: Dry grinding can damage bearings and cause shaft breakage.

Resolvent:

Avoid idle running of the pump.
Regularly inspect and maintain bearings.

Unable to extract liquid

The main reasons for not being able to extract liquid include:

Leakage in the suction pipeline: Leakage can cause the pump to be unable to suck in liquid.
Blockage of debris in the suction pipe: debris can block the pipe.
Pump reversal: Motor reversal can cause the liquid to not be discharged properly.
The suction height of the pump is too high: a high suction height will increase the difficulty of suction.

Resolvent:

Check and repair the air leakage problem in the suction pipeline.
Clean the debris inside the suction pipe.
Ensure that the motor rotates in the forward direction.
Reduce the suction height of the pump or increase the amount of injected liquid.