Water Pump Performance Curves

The pump performance curve describes the relation between the flowrate and the head for the actual pump. When youre reading a curve the pumps flow rate will be on the top and bottom and its height to push is on the sides.

Pump Performance Curve At Rotation Speed Of 1485r Min While

A pump curve is a graphical representation of the performance characteristics of a pump.

Water pump performance curves. In fact the curve reaches a high point prior to zero flow then declines as it approaches shutoff. Always contains the latest available data. The performance parameters belonging to the bep represent the criteria for an optimum utilization of the pump around which the recommended range of operation is indicated.

A pump curve provides a wealth of information regarding the performance capabilities of a pump. Information is plotted on an x y graph where the x axis is measured in units of flow and the y axis is measured in units of head power and npshr. Increasing the impeller diameter or speed increases the head and flow rate capacity and the pump curve moves upwards.

Pump curves are drawn showing the performance of the rated impeller diameter. Customized pump selection and analysis. Pump performance curves include the head developed by the pump the power required to drive the pump and the efficiency of the pump all in the function of the pumping rate.

A drooping pump curve is a characteristic head flow pump performance curve that does not continually rise when moving from the best efficiency point bep back to shutoff. To select the correct pump model from the composite curves find the desired flow rate along the bottom scale and the desired pressure on the left hand vertical scale. The rated diameter impeller is the actual size of the impeller installed in the pump.

A pump manufacturer conducts a variety of tests and the findings are then reflected on a graph which we refer to as the pump curve. A pump performance curve is simply a graph or chart that represents the performance capabilities of a given water pump. Some curves are drawn to show the performance of several impeller diameters from the maximum impeller to the minimum impeller.

Complete pump performance data and product information. When two or more pumps are arranged in serial their resulting pump performance curve is obtained by adding their heads at the same flow rate as indicated in the figure below. Choose from over 6000 sizes in goulds extensive offering.

Other important information for a proper pump selection is also included like efficiency curves npsh r curve pump curves for several impeller diameters and different speeds and power consumption. Centrifugal pump impellers can be machined to larger or smaller diameters to alter the performance to best match the application. Centrifugal pumps in series are used to overcome larger system head loss than one pump can handle alone.

Pump selection download the pss user guide to learn how to view individual performance curves when only pump model and size are known. Pump curves are essentially data about a given pumps ability to produce flow against certain head. Find the point where the vertical line from the.

Selecting a pump model from the composite curves composite curves appear at the beginnings of the low and high speed sections.

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