Centrifugal pump characteristic curve is a set of curves that will be plotted by experimentally measured Q, H, N, η, etc. This picture is provided by Shanghai Yiling Pump Co.,
Different types of pump characteristics curve is different, but have the following three curves:
(1) HQ line represents the relationship between head and flow;
(2) NQ line represents the relationship between pump shaft power and flow;
(3) η-Q line shows the relationship between pump efficiency and flow;
(4) the pump characteristic curves are measured at a certain speed curve so that the injection speed n value.
Centrifugal pump performance curve can be used as a basis for selecting the pump. Determine the type of pump and then follow the flow and pressure pump.
Below we have collected some of the types of centrifugal pumps and the choice of the law, I hope for your actual use of help
First, the type of centrifugal pump
According to the nature of the liquid being transported can be divided into:
(1) Centrifugal pumps Pumps (type B, type D, type sh) are used to transport clean water and clean liquids with chemical and physical properties similar to water.
(2) corrosion-resistant pump (F-type) used to transport acid, alkali and other corrosive liquids.
(3) Oil pump (Y type) is used to transport petroleum products.
Second, the choice of centrifugal pump
(1) Determine the type according to the nature of the liquid being transported and the operating conditions;
(2) Determine the type of pump (selected from the catalog or catalog) based on the flow rate (usually determined by the production task) and the required head pressure in the pipeline.
(3) If the viscosity and density of the liquid to be transported differ greatly from that of water, the characteristic parameters of the pump should be calculated: flow rate, pressure head and shaft power.
When selecting a centrifugal pump, there may be several pump types that satisfy the requirement of operating in the optimum range at the same time. In this case, the efficiency of each pump can be determined separately.
Centrifugal pumps are characterized by large delivery capacity, uniform flow, but the resulting pressure head is not high and the pressure head changes with the flow rate changes.
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