This pumping principle produces a pulsating flow, rather than a smooth flow. For variablespeed pumps, the performance curve is given at minimum and maximum rpm. Rapid allweiler pumps whilst all care has been taken to ensure the accuracy of the information contained in this brochure was correct at the time of printing, please be advised we cannot be held responsible for any errors contained within and or changes that may have taken place. Reading centrifugal pump curves national environmental. Grundfos demand driven distribution provides substantial reductions in leakage losses and energy costs. Made entirely of corrosionresistant stainless steel, sp pumps are ideal for a wide variety of applications. Riverbank filtration in riverbank filtrationwells, the well is placed nearby a river.
Reading and understanding centrifugal pump curves is key to proper pump selection, and to their reliable and efficient operation. The cmbe booster is designed for domestic and commercial water supply, pressure boosting, irrigation and dewatering applications. Product families if you want to find product and service portfolios, technical information, drawings, descriptions, performance curves, repair and maintenance, optimisation and consultancy, click. In household systems, friction can be a greater proportion of the pump energy. Our solutions help our partners move water for residential and commercial buildings, groundwater, industry and municipalities. Disconnect the pump from the power supply so that it is deenergised. The difference between the cr and cre pump ranges is the motor.
Get 3d pump models with all the information you need. A variety of applications the standard models of nb and nk pumps are suitable for. The basic cr pump range is available in four different materials. The product center displays any recent and saved items including complete projects right on the main page. Pump curves and other product data in this bulletin are for illustration only. Characteristic curve discharge diameter head, capacity and efficiency according to iso standard 2548. Pump manufacturers use the terminology called head and pump users use pressure to measure the performance.
High pump efficiency often pump efficiency is a neglected factor compared to the price. Pipeflo can select pumps directly from the supplied electronic pump catalog. Cr vertical multistage centrifugal inline pumps grundfos. The grundfos nk models are longcoupled singlestage centrifugal pumps of a modular design comprising a motor, a coupling, and a pump part, mounted on a base frame.
Gallons per minute capacity in cubic metershr centrifugal series 1531 60z impellers are trimmed in incre ments to supply required capacity. The grundfos 3 and 4 submersible pump range offers high efficiency, high sand resistance and reliability for a wide variety of applications. The performance curves for a centrifugal pump are shown in figure 1. On the product pages, you can download installation and operating instructions, data booklets, service instructions, etc. Head, the qh curve the qh curve shows the head the pump is able to perform at a given flow. Grundfos holding as, poul due jensens vej 7, 8850 bjerringbro, denmark and grundfos pumps ltd. If you want to find a pump, and you know what kind of application you have, such as heating, pressure boosting, etc. More importantly, the pump performance, after the pump has. Issue date suction diameter october 2005 40mm 25mm 1450 rpm din 24 255 nt 25200 10% 15% 20% 25% 27% 27% 01234567 q m3hr head m 4 8 12 16 p kw 0. Irrigation can enhance both crop quality and quantity and it can even do so in areas where precipitation already can sustain agriculture. This tech brief examines how pump curves can provide data about a pumps abili.
What follows is a brief presentation of the different pump performance curves. The manual pump curve displays the minimal information, showing only the pump head as a function of flow rate. Normally, pump curves in data booklets only cover the pump part. When designing an application, it can sometimes be difficult to get access to a 3d pump model. Pump pump inlet gravel packing well screen submersible motor redox layer casing sealed at layers of clay fig. Pump efficiency is the ratio of the liquid horsepower delivered by the pump and the brake horsepower delivered to the pump shaft. Coverage includes pump classifications, types and criteria for selection, as well as practical information on the use of pumps, such as how to read pump curves and cross reference. In chapter 3 you can read about how to adjust the pumps performance when it is in operation in a system. Using this method, the river water is filtered through the ground.
Grundfos sp submersible pumps are renowned for their high efficiency and reliability throughout the range. The impeller has a uniform blade length, b, of 2 in. The manufacturers pump curves use pump operating data entered, checked, and supplied by the manufacturer of the pump. The theoretical basis for energy conversion in a centrifu gal pump is introduced in chapter 4, and we go through. This tech brief examines how pump curves can provide data about a pumps ability to produce flow against certain head, shows how to read a typical centrifugal pump curve, and provides information about pump efficiency and brake horsepower. The pump will then stop when the pressure is 7 psi above the setpoint.
Pressure differential or head is given in kpa or mws meter water column. However all pump systems are different, in some systems the friction energy may represent 100% of the pumps energy, this is what makes pump systems interesting, there is a million and one applications for them. Contact a customer service rep for additional resources. The total pressure caused by a piping system is the sum of. The smarttrim system used on the spumps makes it easy to adjust the factoryset impeller clearance and thus to maintain maximum pump efficiency. The pump performance curve shows the correlation between media flow q and the pressure differential or head h that the pump creates. This article provides a quickstart guide to getting your head around these important pieces of data. Shut off head is the head developed by the pump at zero flow. It measures flow, pressure, power absorbed, and overall efficiency of the pumps you have installed over a given period, and highlights how much energy you could save by switching to more efficient pumps and motors. If fitted, close the shutoff valve in the suction pipe and discharge pipe. Pump curves are a diagnostic tool, for establishing pump performance in an operating system. Centrifugal pump curves formats engineered software. Sizing and selection tools, quick dimensioning, pump replacement tools, cad drawings, pump curves and other relevant data.
Grundfos sp pumps represent stateoftheart hydraulic design. Nb, nbg, nbe, nbge endsuction closecoupled pumps grundfos. A wide pump range grundfos offers energyefficient submersible pumps ranging from 1 to 280 m3h. Review the information when reading pump curves, simply type in your duty point or just click directly on the graph and compare it to the pump curve. Its output flow tends to vary little with respect to the pressure at the pump outlet, because the moving. Cre, crie and crne pumps are fitted with an emotor, i. This handbook, developed for engineers and technicians who work with design and the installation of pumps and pump systems, includes answers to a wide range of technical questions. Head, power consumption, efficiency and npsh are shown as a function of the flow. A list of our performance curve data sheets available for download are listed below. Reading centrifugal pump curves the environmental finance. Grundfos circulators are specifically designed for heating and cooling systems. Put the standard centrifugal pump above the liquid, and problems can arise, as it does not have the ability to create a vacuum and prime itself.
The vanes are free on one side and enclosed on the other. Specifically designed for heating and cooling in residential and commercial applications. They therefore apply to any fluid which is similar to water and has a viscosity of 1 cp and a specific gravity of 1. Get access to national pumps product brochures, manuals, and prodct catalog on our resources page. 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 curves show the pressure m head against flow m 3 h for water at 20 o c and for a pump operating at 2 pole speed 2900 rpm with a 50 hz supply. For a pump user shut off pressure of the centrifugal pump is. Built to deliver optimum efficiency during periods of high demand. On xy plot, head is plotted in y axis while flow is plotted in x axis. The pump range consists of many pump sizes, and each pump size is available with an optional number of stages to match any duty point. Pump suppliers publish pump curves for all the various models. Review different pump types commonly used understand the difference between centrifugal pumps and positive displacement pumps understand the working principle of the tuthill. Centrifugal pump can be defined as a mechanical device used to transfer liquid of various.
A complete range of nonselfpriming, singlestage, centrifugal volute pumps. In the case of dangerous pumping media, legal and works safety directions must be observed. The cmbe series is available in both 1x110120v and 1x200240v variants and uses energy efficient, permanent magnet motor technology, which provides unmatched reliability, quiet operation, and energy savings. This type of pump does a good job as long as the supply of liquid. The basic cr pump range, which can be applied in almost any industrial solution, is already in itself the broadest range available. The operating point of a pump is determined by the intersection of the pump and system curves. S pump super vortex single or multi channel impeller. Reading and understanding pump curves is an essential skill for anyone involved in specifying any sort of pump. The grundfos pump audit is a comprehensive checkup of your pump system. Therefore, we have developed the grundfos pump handbook which, in a simple manner, deals with various considerations when sizing pumps and pump systems.
The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. At grundfos product center, you can find and download pump drawings, including cad, quickly and easily. Cre, crie and crne pumps are referred to as epumps. Our 3speed models allow you the ability to adjust the pump speed to fit your specific application. The flow rate q and the developed head h are both determined by the intersection.
Undo the suctiondischarge connections and remove the pump from the system. We manufacture more pumps in the united states than any other pump company, setting the standard for innovation, efficiency, reliability and sustainability. Through our modular approach, we have made it even broader. Rsr023sr023 blower pdf 49kb sr015 blower pdf 59kb sr017 blower pdf 58kb sr023 blower pdf 58kb sr035 blower pdf 61kb sr044 blower pdf 61kb. This article explains some of the core concepts behind pump sizing. Apg submersible pump pumping of sewage and wastewater. In a positivedisplacement pd pump, a discrete amount of fluid is trapped, forced through the pump, and discharged. Centrifugal pump characteristic curve components of. The performance of a centrifugal pump is shown by a set of performance curves.
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