How to select a pump (shaft power and efficiency)
Thread Content
When selecting a pump, I initially calculated the flow rate and required head. However, when looking at the products offered by several manufacturers, I found that for pumps with the same flow rate and head, their shaft power and efficiency varied. I wonder how others make their choices? Should one choose high efficiency or low shaft power? Why do different manufacturers have different values for shaft power and efficiency?
This is normal; even among pump manufacturers, there are differences in the efficiency of identical pumps
Different designs can result in varying pump efficiencies; it is recommended to choose the model with higher power when making a budget, to avoid exceeding the budget in the future.
Generally speaking, pumps with lower shaft power tend to have higher efficiency! There are slight differences among the products of different manufacturers