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  1. Bygeorge

    Radial Flow pumps only - Affinity laws?

    The affinity laws for speed change work for all rotodynamic pumps (radial, axial and mixed flow impellers) but for impeller diameter change the laws only apply for radial flow impellers - can anyone tell me why this is the case?
  2. Bygeorge

    Affinity Laws or Similarity laws for Impeller Dia Changes

    Hi, I have come accross an interesting problem when looking to change impeller diameter to increase the flow output of a centrifugal pump. Some books quote using the affinity laws: Q1/Q2 = (D1/D2) H1/H2 = (D1/D2)^2 P1/P2 = (D1/D2)^3 to redraw a...

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