What is the biggest advantage of a diaphragm pump over an impeller pump?

The biggest advantage of a diaphragm pump compared to an impeller pump is its ability to run dry without damaging internal components. This feature is particularly significant in various applications where the pump might not be constantly flooded with liquid.

Diaphragm pumps operate by utilizing a flexible diaphragm that creates a fluctuating volume, which helps in pumping fluid. This design allows them to effectively handle applications with varying fluid delivery demands while maintaining functionality even in the absence of liquid. Many impeller pumps, on the other hand, require a continuous flow of liquid for lubrication and cooling, and running them dry can lead to overheating and damage to the pump’s components.

This capability is especially valuable in marine and industrial settings where pumps may inadvertently be deprived of fluid due to interruptions in supply. Consequently, diaphragm pumps are more versatile in situations with potential fluid supply inconsistencies, making them a preferred choice for many applications where reliability is essential.