Double Suction (Split Casing and Double Suction Designs) The solid handling capability is defined by the space between the front and rear channels in the impeller which for small units could be measured in microns.įluid is drawn into the impeller eye (centre) before centrifugal forces direct fluid through blades, then directed towards the side of the pump casing, and expelled through the outlet. Typically, the closer that radial vanes are together, the tighter the tolerances and more enclosed impeller design, the higher the efficiency and lower the solid handling capacity due to limitations in free passage.īelow is a list of the 10 different types, their advantages and types of fluids they may be used with: Impeller types and flow pattern Closed or Enclosed (Centrifugal, Multistage and First Stage of Side Channel Pumps)ĭesigned for clean fluids with small particles, it is the design with the highest efficiency due to its tight clearances against the internal casing but also between impeller blades. There are 10 types of impeller each having different advantages and disadvantages depending on the application. ![]() ![]() Impeller types in Centrifugal Pumps vary in design depending on the fluid being handled, whether design is low or high pressure, and if the unit designed is self-priming or to handle entrained gas.Ĭare must be taken during selection to ensure a correct balance is achieved between desired outcome for the process and maintenance periods, whilst ensuring maximum process efficiency is obtained.
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