1. Cavitation

This happens when the pressure in the pump body drops below the vapor pressure of the liquid, thereby forming bubbles. These bubbles can then collapse, damaging the impeller and reducing the efficiency of the pump. The solution to this problem is to increase the pressure in the suction line or to reduce the speed of the pump.

2. Pump dry operation

A centrifugal pump running dry or without enough fluid is a major problem because it can cause the pump to overheat, damage the impeller and reduce the efficiency of the pump. Centrifugal pumps rely on the pumped fluid to cool and lubricate the impeller and other moving parts.

When the flow is insufficient, the impeller and other components generate heat due to friction, causing overheating and potential damage. In addition, the lack of fluid can cause the impeller to rotate faster than its intended speed, resulting in premature wear and damage. In extreme cases, dry running of a centrifugal pump can cause the impeller to jam or the pump shaft to break, resulting in expensive repairs or replacements.

Therefore, it is important to ensure that the centrifugal pump is always operating at sufficient flow to prevent damage and ensure optimal performance. The causes of insufficient flow in the pump may be:

1) Pumps/pipes contain air: Adequate exhaust to ensure that all pipes and pumps are completely filled with liquid.

2) The suction stroke is too high: check whether there are any obstacles at the inlet and verify whether the static suction stroke is correct.

3) Impeller rotation: Check the rotation direction of the impeller to make sure it is not reversed.

4) Incorrect speed: Check the power supply voltage and frequency to confirm that the motor is not out of phase.

5) Component blockage: Check and clean the valve, impeller and filter to ensure that there is no blockage.