Reading A Centrifugal Pump Curve Pumps Systems Basic terms: pump curve, bep, and system curves. a pump curve denotes flow on the x axis (horizontal) and head pressure on the y axis (vertical). the curve begins at the point of zero flow, or shutoff head, and gradually descends until it reaches the pump runout point or maximum flow rate. the pump’s operating “sweet spot,” or best. 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. for the sake of example, today we’re going to look at a selection made for the following design.
Reading A Centrifugal Pump Curve Pumps Systems Centrifugal pump curves show 8 important factors that are critical in selecting the right pump for your application. these factors are: flow, head, impeller trim diameter, efficiency, power, npshr, mcsf (minimum continuous stable flow) and rpm. the pump curve also displays the pump model, the pump size and number of stages for multi stage pumps. Let's walk through an example of how to read the centrifugal pump curve. if the flow rate is 300 gallons per minute and there are 100 feet of head, we can see where the points intercept to determine the impeller diameter. in this example, our impeller diameter is roughly 10.5 inches. now that we know our performance point, we can determine the. The curve shape for a given pump is mostly a function of the impeller specific speed (ns). in general, the lower the specific speed of an impeller, the flatter the curve will be. in other words, high head, low flow pumps will have flatter curves than high capacity, low head pumps. typically, the more vanes an impeller has, the flatter the curve. A basic pump performance curve for centrifugal pumps show it the pump's performance and range. in this curve, head is measured in psi; maximum flow rate is measured in gallons per hour. given the relationship between head and psi, we can look at the sample curve in another way and say that at 184.8 feet of head (80 psi x 2.31 feet), the pump.
Understanding Pump Curves For Centrifugal Pumps A Comprehensive Guide The curve shape for a given pump is mostly a function of the impeller specific speed (ns). in general, the lower the specific speed of an impeller, the flatter the curve will be. in other words, high head, low flow pumps will have flatter curves than high capacity, low head pumps. typically, the more vanes an impeller has, the flatter the curve. A basic pump performance curve for centrifugal pumps show it the pump's performance and range. in this curve, head is measured in psi; maximum flow rate is measured in gallons per hour. given the relationship between head and psi, we can look at the sample curve in another way and say that at 184.8 feet of head (80 psi x 2.31 feet), the pump. A pump curve is a graphical representation of a centrifugal pump‘s performance characteristics. it shows the relationship between the flow rate (q), head (h), and power consumption (p) of a pump at different operating points. the pump curve is generated by testing the pump in a laboratory and plotting the data on a graph. Figure 4 4 typical performance curve for a specific impeller diameter. a performance curve is a plot of total head vs. flow rate for a specific impeller diameter and speed. the plot starts at zero flow. the head at this point corresponds to the shut off head of the pump, point a in figure 4 4 (more about this later).