First, the type of centrifugal pump
   According to the nature of the liquid being transported, it can be divided into:
(1) Water pumps ( type B, type D , sh type ) are used to transport clean water and clean liquids that are physically and chemically similar to water.
(2) Corrosion resistant pump (F type ) is used to transport corrosive liquids such as acid and alkali.
(3) The oil pump (Y type ) is used to transport petroleum products.
Second, the choice of centrifugal pump
(1) determining the type according to the nature of the liquid to be transported and the operating conditions;
(2) The flow (typically the task given by the manufacturer) and calculating the required line pressure head, pump model to determine (or select from a sample catalog);
(3) If the viscosity and density of the liquid to be transported are significantly different from the water, the characteristic parameters of the pump should be accounted for: flow, head and shaft power.
   When selecting a centrifugal pump, there may be several types of pumps that meet the requirements of operating in the range of Zui. In this case, the working points of each pump can be determined separately, and the efficiency at the working point can be compared.
   The characteristic of the centrifugal pump is that the liquid feeding capacity is large and the flow rate is uniform, but the generated indenter is not high, and the indenter changes with the change of the flow rate.
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