pump curve and system curve pdf

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  • Water & Wastewater Operation: Pipe Systems, System

    2017-12-1 · npsh shown on the pump curve.) ... system curve development. where a pump operates. results of part loading or system curve deviation on performance. running more than one pump at a time. parallel pumping. pump performance with parallel pumping at any given head, flows are additive.

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  • Pumping System Curves - Michigan Technological

    2014-3-3 · system pump W HH mg How do we use the system head curve to choose a pump? mg W g F z g v g P friction s on , 2 2 All the contributions to load on the pump = H sys, system head Pumping effort and friction are accounted for when the system curve intersects the pumping head curve Hpump(Q) Plot this versus Q Obtain this versus Q from the manufacturer

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  • Pump & System Curve Data for Centrifugal Pump

    2019-7-29 · Manual covers centrifugal pump performance curve and system curve data. Other sections provide additional information on the selection and application of centrifugal pumps. It should be noted that example curves used herein are illustrative only and manufacturers’ data should be consulted for specific information.

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  • Pump Curve System Curve - โครงการส่งเสริมการ ...

    2018-7-13 · การวิเคราะห์ Pump Curve และ System Curve + 3.1 H = h 3.2 d –h s 2 d- 2 s + h m 2g gZ E loss P V gZ P V 2 2 2 1 1 2 1 2 Promoting of Energy Efficiency in Commercial Buildings, PEECB ขอบคุณครับ Title ไม่มีชื่อเรื่อง ...

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  • Understanding Centrifugal Pump Curves - M.G. Newell

    2017-7-5 · Understanding 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.

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  • System Curve and Pump Performance Curve

    2012-6-20 · characteristic curve. This curve is plotted on the pump manufacturer’s performance curve for a given pump and it shows the relationship between the head and capacity (flow rate) of a given pump/impeller combination. The second part deals with what is commonly referred to as the system curve. It depicts a system’s piping circuit resistance ...

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  • Selecting a Centrifugal Pump by System Analysis

    2017-9-8 · Then, we make a system curve, considering the friction and pressure drops in the system-this is shown as the green curve. Suppose, we have estimated our operating conditions as 500 m3/hr flow and 50 m head, we will chose a pump curve which intersects the system curve (Point A) at the pump's best effi-ciency point(BEP).

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  • 6. PUMPS AND PUMPING SYSTEM

    2019-1-3 · Select one pump Select curve type (exponential or multipoint) Flow interval based on number of points (10 minimum) Assumptions All water will flow through that pump and its connected pipes Max Flow at point where pump head is zero on pump curve Current system conditions apply Model Run

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  • Selecting a Centrifugal Pump by System Analysis

    2012-6-20 · characteristic curve. This curve is plotted on the pump manufacturer’s performance curve for a given pump and it shows the relationship between the head and capacity (flow rate) of a given pump/impeller combination. The second part deals with what is commonly referred to as the system curve. It depicts a system’s piping circuit resistance ...

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  • CENTRIFUGAL PUMP SELECTION, SIZING, AND

    2007-6-9 · that is called the system curve. The operating point is the point on the system curve corresponding to the flow and head required. It is also the point where the system curve intersects the performance curve. The design system curve is usually calculated with extra flow capacity in mind. It is good Figure 4-8 Desirable pump selection area.

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  • System Curve and Pump Performance Curve

    2021-5-7 · The System Curve. A fluid flow system is characterized with the System Curve - a graphical presentation of the Energy Equation.. The system head visualized in the System Curve above is a function of elevation - or the static head and the major and minor losses in the system and can be expressed as:. h = dh + h l (1). where

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  • Fundamentals Of Pumps

    2016-10-4 · five changes that can be made in a pump or its surrounding system that can reduce cavitation. 1.7. LIST. three effects of cavitation. 1.8. DESCRIBE. the shape of the characteristic curve for a centrifugal pump. 1.9. DESCRIBE. how centrifugal pumps are protected from the conditions of dead heading and pump runout. Rev. 0 Page v ME-03

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  • The System Curve, the Fan Curve, and the Operating Point

    2018-8-27 · System Curve Summary •Air system are typically turbulent. •The pressure is related to the square of the velocity. •A fixed duct system has one and only one system curve. •Changing something in the ductwork creates a new duct system with a new system curve.

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  • Parallel and Series Pump Application - Xylem Applied Water

    2012-10-16 · the composite paralleled pump curve, select several values of head on the single pump curve, double the flow at that head, and plot the points. Connect the points to determine the combined effect of both pumps in parallel. This procedure is shown in Figure 3. Two Parallel Pump System Operation Figure 4

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  • VARIABLE SPEED PUMPING - Energy

    2017-6-2 · System curve and a performance curve for a rotodynamic pump Figure ES-4. System curve and a perfor-mance curve for a positive displacement pump Interaction of Pumps and Systems When a pump is installed in a system, the effect can be illustrated graphically by superimposing pump and system curves. The operating point will always be where

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  • Reading a Centrifugal Pump Curve | Pumps & Systems

    2018-2-19 · A second curve, called the system curve, is used in conjunction with the pump curve and can be overlaid on the same graph. The system curve represents the system head in your specific application at various flow rates and is calculated by determining the system’s static head and friction loss.

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  • How Pump Curves Assist in Selection | Pumps &

    2018-6-19 · Although the published curve may seem confusing, a lot of critical information can be extracted from this pump curve. If you understand the charts, you will benefit from the data they offer. Remember: The Y axis (vertical) on this curve is the head in feet and meters, and the X axis (horizontal) is the capacity (flow rate) in m3/h and gpm.

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  • Pump system how-to FREE book

    2019-2-15 · The purpose of this book is to describe how pressure can be determined anywhere within a pump system. The inlet and outlet of a pump are two locations where pressure is of special interest. The difference in pressure head (the term pressure head refers to the energy associated with pressure) between these two points is known as the Total Head.

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  • System Curve and Pump Performance Curve

    2021-5-7 · The System Curve. A fluid flow system is characterized with the System Curve - a graphical presentation of the Energy Equation.. The system head visualized in the System Curve above is a function of elevation - or the static head and the major and minor losses in the system and can be expressed as:. h = dh + h l (1). where

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  • Exp F4 - System and pump characteristics.pdf -

    System charactheristic curve. The pump characteristic curve will indicate the pump performance in terms of its delivery head against the discharge. As shown in Figure 1, as the dischrge increased, there will be some lost in its delivery head. For the system characteristics, this is shown in Figure 2.

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  • Basic Hydraulic Considerations - Innovyze

    2019-1-3 · Select one pump Select curve type (exponential or multipoint) Flow interval based on number of points (10 minimum) Assumptions All water will flow through that pump and its connected pipes Max Flow at point where pump head is zero on pump curve Current system conditions apply Model Run

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  • Know Your Pump and System Curves - Part 1 - AFT Blog

    2016-12-5 · AFT Fathom can easily generate a pump and system curve for your piping system. Creating a pump and system curve for a simple system with a single flow path and no control features is an easy and typically well-understood process. However, as piping systems are quite complicated with lots of branch points, control features, and dynamic interaction...

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  • Pump operating point I - University of Florida

    2009-4-27 · Pump operating point I Discharge A centrifugal pump can operate at a combination System Curve of the Pump of head and discharge points given by its H-Q curve, called the operating point. Once this point is determined, brake power, efficiency, and net posi-tive suction head required for the pump can be ob-tained from the set of pump curves.(pm /mn

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  • Parallel and Series Pump Application - Xylem Applied Water

    2012-10-16 · the composite paralleled pump curve, select several values of head on the single pump curve, double the flow at that head, and plot the points. Connect the points to determine the combined effect of both pumps in parallel. This procedure is shown in Figure 3. Two Parallel Pump System Operation Figure 4

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  • Pump curves | Grundfos

    2021-5-13 · The pump performance curve shows the correlation between media flow (Q) and the pressure differential or head (H) that the pump creates. The units for Q are normally [m 3 /h] or [l/s] ... The performance curve is used together with the system characteristics …

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  • Variable Speed Drive (VSD) for Irrigation Pumping

    system curve relating flow rate to total head needs to be developed. In general the system curve will consist of the sum of the static and friction heads as shown in Figure 6. Figure 6 – System curve . The performance of a pump is typically shown graphically in a pump curve. A pump curve shows the relationship between total dynamic head and ...

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  • Pump system how-to FREE book

    2019-2-15 · The purpose of this book is to describe how pressure can be determined anywhere within a pump system. The inlet and outlet of a pump are two locations where pressure is of special interest. The difference in pressure head (the term pressure head refers to the energy associated with pressure) between these two points is known as the Total Head.

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  • Balancing a Pump Curve against a System Curve |

    2021-5-8 · This article will demonstrate how you can balance a pump curve against a system curve to calculate liquid velocity with Excel. First, we'll develop the equations that determine the liquid velocity in a simple pump and pipe system. Then we'll discuss how these equations be …

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  • (PDF) Pump | Talha Mallhi and bilal mangrio -

    Then, we make a system curve, considering the friction and pressure drops in the system- this is shown as the green curve. Suppose, we have estimated our operating conditions as 500 m3/hr flow and 50 m head, we will chose a pump curve which intersects the system curve (Point A) at the pump's best effi- ciency point (BEP).

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  • Energy Tips – Pumping Systems

    2014-5-22 · Performance Curve System Single Pump Performance Curve Flow Provided by Each Parallel Pump Single Pump Operating Point Parallel Pump Operating Point Total Head (ft) Flow Rate (gpm) Figure 1. Composite pump curve for two identical pumps operating in parallel. BestPractices is part of the Industrial Technologies Program Industries of the Future ...

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  • Pump curves | Grundfos

    2021-5-13 · The pump performance curve shows the correlation between media flow (Q) and the pressure differential or head (H) that the pump creates. The units for Q are normally [m 3 /h] or [l/s] ... The performance curve is used together with the system characteristics …

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  • Pump curve - Chemepedia

    2021-5-5 · A pump curve is a clever way to graph the characteristics of a single pump. Depending on the manufacturer and how it they decide to show the information, will decide what is on the x-axis and y-axis. Normally the flow rate of the fluid is displayed on the x-axis …

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  • Pump Sizing: Bridging the Gap Between Theory and

    2021-5-11 · System head can be plotted on the same axes as the pump curve. The point at which the system curve and the pump curve intersect is the operating point, or duty point, of the pump. Remember that a system curve applies to a range of flows at a given system configuration. Throttling a valve in the system will produce a different system curve.

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  • Understanding pump curves 4: variable speed – the

    2013-7-15 · If the pump curve is also reasonably flat, a small speed change may result in a dramatic change in system flow. A steeper pump curve may help, but control of “Flat” systems is often problematic; particularly at low system flows. For “Flat” systems it is valuable to draw the pump curves at various speeds against the system curve and ...

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  • Modern Pump Selection Part 5: How the System Curve

    2016-4-25 · The system curve pivots up or down with each and every flow change that occurs out in a live system (Figure 1). Generally speaking, as 2-way valves open to increase flow, the system curve pivots down. As 2-way valves close to reduce flow, increasing system resistance, the system curve pivots up.

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  • How to Read a Pump Curve: Complete Guide

    2020-11-17 · How to read a pump performance curve remains a topic of great interest across the food, dairy, beverage, and pharmaceutical processing industries, so in this post we provide important information on two of our most popular styles — Centrifugal and Positive Displacement.. A pump performance curve helps you select the right pump for the specific needs of your application.

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  • Pump Characteristic - an overview | ScienceDirect Topics

    The pump characteristic curve can be used effectively to select a suitable pump for the duty that is required and it can also be used to establish the capacity of a pipeline system as a function of the speed of a pump that already exists in the pipeline. The physical details and frictional characteristics of the pipeline and all fittings and included equipment must be known.

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  • Lowara Smart Pump Range - Xylem Inc.

    2020-6-10 · area of a pump to maximize flexibility and enhance system design. When coupled with multistage pump technology like e-HM, e-SV or VM, it presents a compact footprint, making it suitable for tight-space installations. Extended working performances smart hydraulic curve vs. previous solution with TKS [m] 70 OLD DESIGN: TKS 5HM08S (max speed 50 Hz)

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  • Pump Curves - University of Arkansas System Division of ...

    2014-4-16 · system curve Pump Curve. 3 LSU AgCenter Pub. 3241-H: Pump Curves a pump to specific needs. An example of two different size impellers is shown in the following pump curve diagram. ... pump.pdf – a 100-plus page booklet covering many aspects of pump operation, including economics

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  • Pump theory for building services - Tadmur Trading

    2010-2-10 · The appearance of the pump curve is dependent on the pump’s hydraulic properties and the motor speed. All pump curves are normally defined at 20° C with clean water.Conversion tables are available for other temperatures and liquids. The system curve The system curve describes the resistance that exists in the pipe system. In other words, all ...

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  • Back to Basics Pump Sizing - AIChE

    2016-11-28 · pressure required to achieve a given flowrate in the system downstream of the pump. The system head is not a fixed quantity — the faster the liquid flows, the higher the system head becomes (for reasons to be discussed later). However, a curve, known as the system curve, can be drawn to show This article explains some of the

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  • Pump Control/System Automation - KSB

    curve is moved to a lower flow rate. The pump thus generates a higher pressure (head) than is necessary for the system. The excess head thus created is broken down in the restricting fitting to create a pressure drop. 6 1 Principles H [%] P [%] W Q [%] Q [%] Pump characteristic curve System characteristic curve (part load) Throttled operation ...

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  • Pump Sizing: Bridging the Gap Between Theory and

    2021-5-11 · System head can be plotted on the same axes as the pump curve. The point at which the system curve and the pump curve intersect is the operating point, or duty point, of the pump. Remember that a system curve applies to a range of flows at a given system configuration. Throttling a valve in the system will produce a different system curve.

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  • Experiment (9): Centrifugal pump Introduction

    2014-1-7 · define their operating points. System analysis involves calculating a head - flow curve for the pumping system (valves, pipes, fittings, etc.) and using this curve in conjunction with the performance curves of the available pumps to select the most appropriate pump(s) for use within the system.

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  • Determine the Characteristic Curve of an Installed Control ...

    2019-5-10 · create an installed characteristic curve for a control valve. Consider the typical piping system in Figure 3 consisting of a Supply Tank, Pump, Flow Control Valve (FCV), Heat Exchanger (HX), and a Product Tank. The pump curve has been specified for the pump and CV data has been entered

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  • Performance Evaluation of Vacuum System: Pump-down

    2016-9-9 · rere provides the characteristics curve showing relation of pumping speed versus pressure for each vacuum pump. This characteristic curve helps to determine the pump-down time in ideal situation. Pump-down time is the time required to to achieve the required pressure. But the characteristics curve has limitations when actual sys-

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  • Modern Pump Selection for System Efficiency

    2018-4-2 · HVAC pumping systems having a total pump system power exceeding 10 hp that include control valves designed to modulate or step open and close as a function of load shall be designed for variable fluid flow and shall be capable of reducing pump flow rates to 50% or less of the design flow rate.

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  • Pump Curves - University of Arkansas System Division of ...

    2014-4-16 · system curve Pump Curve. 3 LSU AgCenter Pub. 3241-H: Pump Curves a pump to specific needs. An example of two different size impellers is shown in the following pump curve diagram. ... pump.pdf – a 100-plus page booklet covering many aspects of pump operation, including economics

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  • Figure 1 - Zoeller Pump Company

    2019-1-24 · Capacity, and Pump Efficiency vs Capacity. Therefore, the constant between each curve is the Capacity, which is plotted on the x axis. To determine the performance data at a particular point, first locate the operating point of the pump. This is the point where the system head curve

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  • Matching Pumps and Systems - Computer Action Team

    2007-2-21 · • Be able to sketch a basic system curve. • Be able to modify a sketch of a system curve to take into account changes in elevation and changes in valve settings. • Be able to define NPSH, NPSH A, and NPSH R • Be able to define the vapor pressure of a liquid • Be able to explain why maintaining adequate NPSH is necessary for pump ...

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  • Back to Basics Pump Sizing - AIChE

    2016-11-28 · pressure required to achieve a given flowrate in the system downstream of the pump. The system head is not a fixed quantity — the faster the liquid flows, the higher the system head becomes (for reasons to be discussed later). However, a curve, known as the system curve, can be drawn to show This article explains some of the

    Get Price
  • Pump Control/System Automation - KSB

    curve is moved to a lower flow rate. The pump thus generates a higher pressure (head) than is necessary for the system. The excess head thus created is broken down in the restricting fitting to create a pressure drop. 6 1 Principles H [%] P [%] W Q [%] Q [%] Pump characteristic curve System characteristic curve (part load) Throttled operation ...

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  • System curve and pump efficiency Solution The static

    System curve and pump efficiency Solution The static head is the 10 lift from MSE 624 at IIT Kanpur

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  • How to Read a Pump Curve: Complete Guide

    2020-11-17 · How to read a pump performance curve remains a topic of great interest across the food, dairy, beverage, and pharmaceutical processing industries, so in this post we provide important information on two of our most popular styles — Centrifugal and Positive Displacement.. A pump performance curve helps you select the right pump for the specific needs of your application.

    Get Price
  • Performance Evaluation of Vacuum System: Pump-down

    2016-9-9 · rere provides the characteristics curve showing relation of pumping speed versus pressure for each vacuum pump. This characteristic curve helps to determine the pump-down time in ideal situation. Pump-down time is the time required to to achieve the required pressure. But the characteristics curve has limitations when actual sys-

    Get Price
  • Modern Pump Selection for System Efficiency

    2018-4-2 · HVAC pumping systems having a total pump system power exceeding 10 hp that include control valves designed to modulate or step open and close as a function of load shall be designed for variable fluid flow and shall be capable of reducing pump flow rates to 50% or less of the design flow rate.

    Get Price
  • Pump curve doesn't cross system curve - Pump

    2013-6-11 · Consequently the pump curve does intersect the system curve. Just not at the BEP. There is no reason why it won't run there. Perhaps not the most efficient operation, but maybe not all that inefficient, (some pumps get even a little more efficient to the right) and it will be maintenance intensive, but as long as the NPSH and power are ...

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