Pump selection
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Head: 570 m, flow rate: 150 cubic meters per hour, inlet pressure: 0.1 MPa, fluid: deionized water, fluid temperature: 30°C. For this condition, should a multi-stage pump or a high-speed pump be chosen? Which one has a higher cost? Which one has higher efficiency?
Choose a multi-stage pump; the flow rate isn’t very low, and high-speed pumps might be more expensive.
Multistage pumps have relatively high flow rates and head values; high-speed pumps require higher technical standards than multistage pumps
It is better to choose a multi-stage pump, as it has higher efficiency. Due to its lower rotation speed, it operates more stably and safely. As for high-speed pumps, their advantage is smaller size, but their efficiency is low and the cost of spare parts is high.
Choose a multi-stage pump; it offers high flow rates and head, has a low cost, and is easy to maintain
For a pump with a capacity of 300-400 KW, it’s better to choose a multi-stage pump. High-speed pumps are rarely large in size, and it’s not easy to find ones with suitable hydraulic parameters, especially since the flow rate in your case is not low