You realize the pump is worn out quickly?

There are corrosive substances in the fluid, the pump is corroded. You should use a bigger pump and run at a lower speed.
worn out in one or more parts of the pump.
Lack of lubrication for pumps.
The piping system is in trouble. It can increase the flow temperature in the system.
Too much balance.
The pump runs dry
Except for the above errors, it is best to reduce the NPSH required to use larger pumps and run at lower speeds.