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Vortex impeller

The vortex impeller creates a revolving mass of water which forms a whirlpool. A whirlpool is a funnel shaped opening is created downward from the water surface. It can be developed by water flowing out of a small opening in the bottom of a basin, a reservoir or by a pump. Impellers creating this Vortex are called vortex impellers.  

The benefit of a vortex impeller over a channel impeller is the minimised risk of clogging. A vortex impeller is also a better choice when the pumped liquid has a high content of sand. The efficiency of a pump with a vortex impeller is typically lower than a pump with a channel impeller. 

Grundfos supplies submersible and dry-installed wastewater pumps with vortex impellers with a low risk for clogging.