Please contact wanner engineering or your local stancor distributor for. Three speed with manual adjustment to optimise system. Using a stateoftheart pump selection program, it can be used to make accurate and quick pump selections and to gain technical product data, performance curves, arrangement drawings and operation and maintenance. User guide itt goulds pumps is a leading manufacturer of.
Franklin electric offers selection tools to help you find the correct product to fit your specific needs. The course also discusses how centrifugal pumps are selected according to a procedure of matching the system curve of the pipeline to the pump performance curve. Positive displacement pumps are those in which energy is imparted to the liquid in a fixed displacement volume, such as a casing or a cylinder, by the rotary motion of gears. In chapter 3 you can read about how to adjust the pumps performance when it is in operation in a system.
Understanding centrifugal pump curves when selecting a centrifugal pump, one should match the performance of the pump to that needed by the system. The performance of a pump is directly related to its speed in rpm, providing there is no cavitation. On the centrifugal pumps performance curves estimation. The performance of a centrifugal pump is shown by a set of performance curves. The key to generating accurate digital curves is the method with which the pump performance data is saved and displayed. Choose from over 6,000 sizes in goulds extensive offering. Lowara is focused on producing high quality, reliable, costeffective pumping. Head, power consumption, efficiency and npsh are shown as a function of the flow. Product viscosity centipoise capacity gpm 101 il0588 0 50 100 150 200 250 300 350 400 450 500 1 1,000,000 fkl 600 fkl 400 fkl 50 10,000 100,000 fkl 25 fkl 75 fkl 150 fkl 250. It is crucial to pump selection, and sometimes can mean the difference between an efficient water system and one that is marginally operable, l eading to frequent callbacks. At some point in the pump selection process, the impeller diameter is selected.
The blue dot in the curves above is the design point. Seriesconnected pumps are added vertically to increase h. Section 1200 index sheet item pages bulletin 110012000. Pump selection download the pss user guide to learn how to view individual performance curves when only pump model and size are known. The selection chart shows the various pump sizes available for a given manufacturers pump line and speed. A typical composite curve includes the pump performance curves, horsepower curves and npsh required. Often, a complete line of pumps of one design is available and a plot called a composite or quick selection curve can be used, to give a complete picture of the available head and flow for a given pump line fig. Use the line tab to adjust pump speed and impeller diameters and to graph pumps individually, in series or in parallel. To do that, an engineer would refer to a pumps composite curve. Both pumps should be analyzed by performing a lifecycle cost analysis using the pump efficiencies from the. Selection of pumps and valves for optimum system performance.
Pump selection north america water franklin electric. Use the selection informatoin below and the cart on the following page to determine the appropriate stancor pump model and size for your application, then use the detailed performance curves inside for model specific performance curves. Search by design point flow rate and head, set limits, correct for viscosity and analyze pump performance. Once we know the gpm and pump head, we can start the centrifugal pump selection. An understanding of pump performance curves is an important part of a pump installers storehouse of knowledge. They also provide easy selection charts which are just pump curves for several models of pumps in a table format.
Pump performance curves are generated by conducting water tests on pump and impeller combinations. It also discusses positive displacement pumps, types of valves and pumps, and a valve selection guide. Pump selection, sizing and interpretation of performance curves 4 3 performance curve at some point in the pump selection process, the impeller diameter is selected. Baldoukas department of mechanical engineering, tei of halkida, 34 400 psachna, greece abstract. The first curve, shown below, is the pump you selected. From there you can adjust operating speeds, viewsave electronic curves and data sheet reports in a pdf. A characteristic curves selection chart is the graphic representation of several characteristic curves which shows the effect of various changing parameters on machines in one diagram. Chapter 2 describes how to read and understand the pump performance based on the curves for head, power, efficiency and npsh. Each graph will usually have curves representing the pump head vs.
The selection chart is useful in developing a short list of pumps for consideration. Pump curves centrifugal 0 20 40 60 80 100 120 140 160 0 200 400 600 800 1200 total dynamic head, ft flow rate, gpm 600 gpm 65 ft tdh 525 gpm 76 ft tdh unacceptable pump selection pump provides required q only when pumping against best case system curve not realistic q required 600 gpm expected pump performance range. A pump curve is a plot of outlet pressure as a function of flow and is characteristic of a certain pump. Pumps and pumping system bureau of energy efficiency 118 figure 6.
For two identical pumps, the maximum h will double. But in addition variation of efficiency, power, npsh required etc, as the flow is changed, can also be represented on the pump performance curves by the manufacturer. In such cases, please consult fristam pumps or your local fristam distributor. Complete pump performance data and product information. Model cdu performance curves cdu ebara stainless steel centrifugal pumps ebara pumps americas corporation standard pump division. Notice that pump performance curves with anomalies, such as inflection points, are not well represented by the polynomial regression. This tech brief examines how pump curves can provide data about a pumps abili. Pump curves centrifugal 0 20 40 60 80 100 120 140 160 0 200 400 600 800 1200 total dynamic head, ft flow rate, gpm 600 gpm 65 ft tdh 525 gpm 76 ft tdh unacceptable pump selection pump provides required q only when pumping against best case system curvenot realistic q required 600 gpm expected pump performance range. Lets look at the variable speed curves for the two pumps. These curves contain extremely important data that pump users need to analyze and interpret for proper pump selection and efficient operation. This principle is commonly used in multistage pumps. Lowara pumps are made in fabricated stainless steel, which keeps the water. On the centrifugal pumps performance curves estimation using empirical equations n.
Sizing and selection tools, quick dimensioning, pump replacement tools, cad drawings, pump curves and other relevant data. The pump selection and evaluation software must accurately reproduce the manufacturers published pump curve to aid the customers evaluation of the pump for the application. Ebara submersible sump pumps dsudshu selection chart. Selection for pumping water this section applies mainly to pumping water. Pump suppliers publish pump curves for all the various models. Simply select your system design point, fluid characteristics and npsh ratings and the vtpselector will create a dynamic pump curve. For other pumps, the magnitude of the decrease in pump efficiency may be negligible. Actual pump performance data will typically be presented graphically as shown in fig. Below you will find performance curve information for the vaughan horizontal, vertical, pedestal and submersible pumps.
A centrifugal pump must be selected according to the actual characteristics. The performance curve is used together with the system characteristics. Pumps may be selected either manually using pump curves, or with software. Gather all application information including product nature, viscosity, temperature, nipa, flow rate and pressure loss. From there you can adjust operating speeds, viewsave electronic curves and data sheet reports in a pdf format, generate system curves, simulate. Reading centrifugal pump curves the environmental finance. A pump curve sometimes called a performance curve is a graph that shows the total head, power, efficiency and net positive suction head npsh where a 3 percent head loss occurs npsh3 plotted against rate of flow. For choosing the appropriate pump, see figures 3 and 4. Submersible pumps frequently require smaller drop pipe than do line shaft pumps since the full area of the pipe is used to deliver water to the surface. Goulds model 3196 equipment inventory, including pumps. Drop pipe selection size of drop pipe is selected based on the capacity to be pumped. Ecademy grundfos uk the full range supplier of pumps. Pumps can generate high volume flow rates when pumping against lowpressure head or low volume flow rates when pumping against highpressure head.
Please contact wanner engineering or your local stancor distributor for any assistance you may need in sizing a stancor pump to your specific application. Unlike positive displacement pumps such as piston pumps, centrifugal pumps deliver a var iable flow rate q increasing. Selecting a positive displacement pump using performance curves choosing a pump series a. Pump sizing and selection made easy chemical engineering.
These pdf s contain detailed information, but please consult vaughan or your vaughan representative to assist with your final pump selection. The esh pump replaces the model ssh centrifugal pumps with better efficiency to help you reach your operational goals while maintaining proven performance. Ebara submersible sump pumps dsudshu performance curves project. Session 2 pump selection alabama water environment. The pump performance curves are based on data generated in a test rig using. Ebara stainless steel centrifugal pumps selection chart. The inset is a closeup view of the anomalies in this case study. The most frequent use of pump curves is in the selection of.
Most of our sizeable products are available in fe select, with the remaining available in franklin pump selector online. Pump performance curve a centrifugal pump performance curve is a tool that shows how a pump will perform in terms of head and flow. Spps pump selection tool is the latest electronic product selection package for consultants, contractors and individual end users. View controls which curve elements system curves, etc. Composite curve for size selection performance curves based on 0 psig differential pressure at 12 of maximum speed. Itt industriesgoulds pumps pump selection system pss user s guide 12 line displays the singleline and viscous performance curves. Selecting a centrifugal pump by system analysis 2012 instructor. For example, in the pump performance chart shown below, pump. When selecting a centrifugal pump, one should match the performance of the pump to that needed by the system.
Reading centrifugal pump curves national environmental. With standard back pullout design, maintenance can be done without disconnecting the pump body from the piping. Pump selection guide brown brothers engineers australia. The desired head and flow rates are entered on the curve, and the pumps that overlap the area are valid choices to consider for selection. Overlaid in pink are the performance curves generated by a pump selection tool using a simple polynomial regression. Vaughan pump performance curves resources to assist you. We believe the problem and its solution to be typical of a job that might confront engineers and users. To achieve optimum centrifugal pump performance efficiency for liquid flow rates within the range of 4. The pump curves in figure 3 illustrate the following pump options to choose. To use software intelligently, it is first necessary to understand the manual selection procedures. Since the proper selection and configuration of your esh pump is critical. A group of empirical equations were developed in order to estimate the performance curves h q, n q, p q, npshr q of a centrifugal pump. The performance curves for a centrifugal pump are shown in figure 1.
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