To create head power and efficiency characteristic curves for a centrifugal pump Apparatus 1 Centrifugal pump demonstration unit Figure 1 2 Interface device 3 PC with a …

Get MoreThe process of selecting centrifugal pumps in pumping stations for potable sewage and storm water requires the designer to analyze several aspects of a hydraulic nature that depend not only on the pump’s characteristic curve but also on the characteristic curve of the pipeline system against which pumping is performed

Get MoreThe example below is representing a typical characteristic curve of a centrifugal pump at radial flow The curve is valid at a constant speed the supplier may give different characteristics at different speeds Figure 1 Pump characteristic curve The pump characteristic curve is determined at his premises by the supplier using water 2 Use

Get MoreLets first go through the characteristic curves of centrifugal and reciprocating pump so that the ones referring it for the first time also get the idea of it Certrifugal pump Reciprocating pump Schematic diagram Characteristic curve is essential

Get MoreHydraulics Lab ECIV 3122 Experiment 9 Centrifugal Pump Exercise B Objective To create head power and efficiency characteristic curves for a centrifugal pump Theory One way of illustrating pump characteristics is to construct contour lines of

Get MoreAir Conditioning application The GPM vs foot head capacity curve is general because of the physical characteristics of the centrifugal pump The centrifugal pump produces energy in the form of foot pounds per pound of water pumped and dependent on the volume flow rate passing through the impeller In a manner of speaking the pump

Get MoreAcademia edu is a platform for academics to share research papers

Get MoreFigure 20 27 shows how a centrifugal pump is affected particularly at low flow rates and the behaviour is typical of conventional centrifugal pumps Figures 20 28 and 20 29 present well known information on the effects of dissolved and entrained gas on the volumetric efficiency of a positive displacement pump

Get MoreMain characteristics curves of a centrifugal pump Source Modi and Seth 1998 28 3 2 Operating Characteristic Curves During operation of a pump the pump must run constantly with the speed of the prime mover this constant speed is usually the design speed The set of main characteristics curves which corresponds to the design speed is

Get Morehomologous More specifically two pumps are said to be homologous if they are geometrically similar and the following two dimensionless parameters are the same Figure 7 1 Cutaway sketch of typical centrifugal pump From Munson et al Fundamentals of Fluid Mechanics Figure 7 2 Typical performance curves for centrifugal pump From

Get Morenbsp 0183 32 It must be noted that the centrifugal pump is a mechanical element that is driven by an electric motor and every characteristic curve refers to a precise rotation of the motor which depends in the most common asynchronous motors on the power supply frequency and the number of poles of the motor e g 50 hertz pole motor 2900 RPM

Get MoreUnderstanding Centrifugal Pump Curves When selecting a centrifugal pump one should match the performance of the pump to that needed by the system To do that an engineer would refer to a pumps composite curve A typical composite curve includes the pump performance curves horsepower curves and NPSH required

Get MoreThe performance of a centrifugal pump can be shown graphically on a characteristic curve A typical characteristic curve shows the total dynamic head brake horsepower efficiency and net positive Suction head all plotted over the capacity range of the pump Figures 5 6 amp 7 are non dimensional curves which indicate the general shape of the

Get Morenbsp 0183 32 Did you ever struggle with the complexities of pump system curves Would you like to see how fast and easy it can be to draw one given just two pieces of information Then watch this video to see

Get Morenbsp 0183 32 4 Centrifugal pump characteristic curves Once the basic terms definitions and concept is clear This app will move forward to make understand basic characteristic curves Learning these curves are of most importance for maintenance engineers as most of the maintenance related problems can be solves by comparing the curves with actual data

Get MoreA typical centrifugal pump characteristic curve is shown below There are several terms associated with the pump characteristic curve that must be defined Shutoff head is the maximum head that can be developed by a centrifugal pump operating at a set speed

Get Morenbsp 0183 32 Learn about Pump Characteristic Curve in this excerpt from the Pumps and Motors lecture from our Distribution Exam Prep Course Visit our website americanwatercollege org Email us – info

Get Morenbsp 0183 32 In this article we will see the Pump System Curve and Pump Operating Point Pump system curve represents the resistance offered by the system ie the pressure developed by the pump is high enough to overcome the resistance offered by the system This pressure is …

Get Morenbsp 0183 32 In this article we will see the Pump System Curve and Pump Operating Point Pump system curve represents the resistance offered by the system ie the pressure developed by the pump is high enough to overcome the resistance offered by the system This pressure is …

Get MoreThe curves you can plot at fixed RPM are the flow rate against pressure and efficiency If there is no back pressure there will be a certain flow rate but zero efficiency As you apply back pressure the flow rate reduces until there comes a poin

Get MoreAffinity Laws Applied to Centrifugal Pump Applications Pump and System Curves The pump curve is solely a function of the physical characteristics of the pump The system curve is completely dependent on the size of pipe the length of pipe the number and location of elbows and other factors

Get MoreComplete Characteristics of Centrifugal Pumps and Their Use in the Prediction of Transient Behavior BY R T KNAPP 1 PASADENA CALIF This paper describes the technique of determining the complete operating characteristics of a hydraulic machine such as a centrifugal pump or a turbine together with a

Get Morecharacteristic curves • Pump characteristic curves also offer the opportunity to establish the optimum solution to operate the pump pumps at or closest to the BEP as well as ascertain the implication of operating away from the BEP • Pump curves are a diagnostic tool for establishing pump performance in an operating system

Get MoreHydraulics Lab ECIV 3122 Experiment 9 Centrifugal Pump Exercise B Objective To create head power and efficiency characteristic curves for a centrifugal pump Theory One way of illustrating pump characteristics is to construct contour lines of

Get MoreThe pump characteristic is normally described graphically by the manufacturer as the pump performance curve The pump performance curve describes the relation between the flowrate and the head for the actual pump Other important information for a proper pump selection is also included like efficiency curves NPSH r curve pump curves for

Get Morenbsp 0183 32 Parallel pump characteristic curve is obtained by summing the fluid flow from several pumps at the same head value In practice higher flow rate will also increase the resistance of the system So to compensate these obstacles the operating point of the pump becomes a higher practical pressure value than its theoretical pressure value

Get MoreBy graphing a system characteristic curve and the pump characteristic curve on the same coordinate system the point at which the pump must operate is identified For example in Figure 10 the operating point for the centrifugal pump in the original system is designated by the intersection of the pump curve and the system curve h Lo

Get MoreA pump curve is a graphical representation of the performance characteristics of a pump 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

Get More• The operating point of a centrifugal pump also called its duty point is given by the intersection of the pump characteristic curve with the system curve • The flow rate Q and the developed head H are both determined by the intersection • To change the operating point either the system curve or the pump curve must be changed

Get Moreprocess with a centrifugal pump connected to deliver liquid from A to B Figure 2 shows the characteristic curve of an actual pump a single stage vertical turbine pump together with the characteristic curve of the process known as the system curve The intersection of the two curves …

Get More• The operating point of a centrifugal pump also called its duty point is given by the intersection of the pump characteristic curve with the system curve • The flow rate Q and the developed head H are both determined by the intersection • To change the operating point either the system curve or the pump curve must be changed

Get More