Which type of pump is known for its ability to handle high flow rates with minimal head increase?

The axial flow pump is specifically designed to move large volumes of liquid at relatively low pressure, which allows it to achieve high flow rates with minimal head increase. This is primarily due to its design, which features a propeller or an impeller that moves the fluid in a direction parallel to the pump shaft. In applications where the goal is to transfer large amounts of water quickly, such as in irrigation or in cooling systems, the axial flow pump is particularly effective because it maintains efficiency while minimizing the energy required to generate pressure.

In contrast, centrifugal pumps increase water pressure and are best suited for applications that require high head; however, they may not handle high flow rates as efficiently as axial flow pumps in all scenarios. Submersible pumps typically work well for lifting water from deep sources but can be limited in flow rate compared to axial flow designs. Diaphragm pumps are generally used for applications requiring precise flow control and are not designed for high flow rates.

Thus, the axial flow pump's unique capability to achieve significant flow rates with minimal head elevation makes it the ideal choice in this scenario.