Determining factors of the hydraulic performance for the spiral case

    According to the theoretical derivation and experimental analysis, the hydraulic performance of the centrifugal pump is determined by the following factors.
    One, the diameter of fundamental circle is related to the diameter of the impeller.
    Two, the tongue angle, we should be based on the absolute liquid flow at the impeller outlet angle to select the tongue. But for low and medium specific speed pumps, it allows that the tongue angle and the absolute liquid flow angle is different.
    Three, area of volute flow, if area of volute flow gradually expands from the tongue to the throat in order to accommodate the flow that it is expelled from the impeller.
    Four, the width of the spiral case. If it is in the (1.6-2.0) b2 range, it can select by the flowing type.
    Five, outlet diameter of the pump body
    Six, throat area of the pump body is the main factor to determine the pump optimal operating conditions. The previous point is that the spiral case will not only make the total energy of the impeller increase, but the total energy would reduce. That is the spiral case to produce hydraulic losses.
    Therefore, you should use a variety of effective means to reduce the hydraulic loss to a minimum in the design of the spiral case. But the production process of the centrifugal pump can’t meet the design ideas.
    If you want to know more about the design of centrifugal pump volute, please see official website of Warwick pump company: www.hwpump.com