Evaluating and selecting suitable energy efficient pumps is key, here are some practical guidelines:

1. Determine the demand: First of all, determine the required flow, head and working pressure and other parameters in order to choose the appropriate pump type and specifications.

2. Energy saving performance evaluation: Check the energy efficiency level of the pump (such as energy efficiency mark), and choose a pump with a high energy efficiency level to reduce energy consumption.

3. Efficiency curve analysis: View the efficiency curve of the pump and select a pump with high efficiency and stable performance within the working range to improve energy utilization.

4. Matching system: Comprehensively consider the matching between the pump and the pipeline system to ensure that the working point of the pump is within the normal efficiency range.

5 Frequency conversion speed control: Consider using a pump with frequency conversion speed control function, adjust the running speed of the pump according to actual needs, and further save energy.

6. Material and durability: Choose pumps made of corrosion-resistant and wear-resistant materials to reduce maintenance costs and extend the service life of the pump.