Common causes and solutions for decreased efficiency of split case pumps

During the operation of split case pumps, decreased efficiency is a common problem, which not only affects the work progress, but also may increase energy consumption. HNYB PUMP has sorted out the common causes of decreased efficiency of split case pumps and the corresponding solutions for users' reference.

1. Impeller Issues

The impeller is a core component of a split case pump, and its condition directly affects pump efficiency. Impeller wear is a common cause of reduced efficiency. Long-term transport of media containing fine particles gradually wears the impeller surface, altering the blade shape and affecting water propulsion efficiency. Impeller scaling also reduces efficiency. Minerals such as calcium and magnesium in the water deposit on the impeller surface, narrowing the water flow path and increasing flow resistance.
Minor impeller wear can be repaired and polished; severe wear requires replacement. Impeller scaling can be treated by regular cleaning to remove surface dirt. Also, minimize impurities when transporting media to extend the impeller's life.

2. Piping System Problems

Pipeline blockage or poor flow can significantly impact the efficiency of a split-circuit pump. Debris and algae can accumulate in the pipes, narrowing the flow path and increasing resistance, thereby reducing pump output. Furthermore, pipe leaks can also reduce efficiency. Leakage in the pumped medium can cause energy loss, which can also affect system pressure.

When a pipe is clogged, it is necessary to promptly clean out debris, algae, etc. in the pipe. Depending on the specific situation of the blockage, mechanical or chemical cleaning methods can be used. For pipe leaks, the leak point should be found, and damaged pipe components should be repaired or replaced to ensure the sealing of the pipe.

3. Lubrication System Problems

Split-case pumps require good lubrication for rotating components, such as bearings. Poor lubrication increases friction between components, reduces pump efficiency, and in severe cases, can even cause component damage. Insufficient grease, grease deterioration, and impurities in the grease can all affect lubrication effectiveness.
To address lubrication system problems, regularly check the quantity and quality of the grease. If the grease is insufficient, add appropriate grease promptly. If the grease deteriorates or contains impurities, remove the old grease and replace it with new, qualified grease. Lubrication maintenance should also be performed according to the intervals specified in the pump's instruction manual.

4. Motion Problems

The motor is the power source of a split-case pump, and motor problems can also reduce pump efficiency. Unstable motor voltage can cause fluctuations in motor output power, affecting pump operation. Damage to the motor windings can also reduce motor efficiency and even cause it to malfunction.

If the motor voltage is unstable, a voltage stabilizer can be installed to stabilize the voltage. If the motor windings are damaged, repairs, rewinding, or replacement of damaged motor components are necessary. During daily use, carefully monitor the motor's operating status to identify and resolve any problems promptly.

5. Installation and Adjustment Problems

Improper installation and adjustment of a split-case pump can also affect its efficiency. Large misalignment between the pump and motor can increase vibration and noise during operation, reducing pump efficiency. Improper adjustment of the pump's inlet and outlet valves can cause erratic pressure and flow in the piping system, affecting pump operation.

During installation, ensure that the pump and motor are aligned within the specified range. This can be achieved by adjusting the position of the motor or pump. The inlet and outlet valves should be adjusted appropriately according to actual operating requirements to ensure optimal pump operation.

By understanding the above common causes and solutions, strengthening the maintenance and care of the split case pump in daily use, and promptly discovering and handling problems, you can effectively improve the operating efficiency of the split case pump and extend its service life.