Selecting the impeller type for lifting stations and pumping stations
In addition to the professional installation of above-ground and below-ground lifting systems and pumping stations, the proper functioning of such systems depends on whether the appropriate equipment has been selected for the specific application. The type of impeller used for wastewater conveyance plays a major role in this. There are various impeller types to choose from. The most common include sewer impellers, free-flow impellers and macerators.
Free-flow impeller
Pumps with open-impeller designs feature a large-volume cavity through which wastewater containing long-fibre materials such as sanitary towels and textiles, or even rainwater, can be discharged without causing blockages. Compared to other impeller types, open-impeller designs generally require more energy to achieve the same pumping capacity.
macerator
Macerators or cutting wheels break down the coarse solids contained in the wastewater during the pumping process. Even large, long-fibred solids can be broken up and pumped away in this way. Macerators are therefore also suitable for drainage in difficult terrain, where the wastewater has to travel long distances through small-diameter pressure pipes.
