With an impeller diameter ratio from 25 to 71 and 3 different blade profiles.
Impellers with different diameters and different blade profiles are being selected for the effective realisation of all volume flow and pressure increase ranges. Whether an impeller will achieve a lower or a higher pressure in proportion to the volume flow depends in the first place on the combination of the diameter ratio and the impeller width.
Impeller diameter ratio, size = impeller diameter d 2 in mm
