# pump laws

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• ### Pump Laws Review and Equations - Engineers Edge

2021-5-8 · The affinity laws, or the pump laws, state how such changes influence the performance of the pump. These laws are summarized in the following points. • The flow rate or capacity is directly proportional to the pump speed: double the speed double the flow.

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• ### Pump Affinity Laws - Engineering ToolBox

2019-6-25 · PUMP LAWS Pump Laws are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric !ow rate, shaft speed)

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• ### The Affinity Laws - Pump Laws - Centrifugal Pumps

The affinity laws are a set of forumlas that predict the impact of a change in rotational speed or impeller diameter on the head and flow produced by a pump and power demanded by a pump. If you know the shape of a pump performance curve at a certain speed or with a certain impeller diameter, you can use the affinity laws to predict the performance ...

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• ### Fan and Pump Laws PDF - Microsoft

2018-7-12 · of the pump performance. The Affinity Laws are given below where Q is the volumetric flow rate, is the pump speed, D s is the pump impeller diameter, g is the acceleration due to gravity, H is the pump head ( P g), and is the pump shaft torque. 3 s Q D f w, 22 s gH D y w, 35 s w rw G P, r …

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• ### Pump affinity laws | KSB

2013-5-31 · The change in speed brings about a corresponding change in the head, flow, and power requirements of the pump according to the Affinity Laws. Let’s look at them. Stated simply, the Affinity Laws say: 1. The flow (GPM) varies proportionally with the change in speed. This means that twice the speed is twice the flow.

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• ### Fan and Pump Laws PDF - Microsoft

2019-6-25 · PUMP LAWS Pump Laws are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric !ow rate, shaft speed) and power. 'ey apply to pumps, fans, and hydraulic turbines. GPM = Gallons/Minute

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• ### Fundamental Pump Laws - Acoem USA

2020-9-23 · Fundamental Pump Laws. By Mac MacCormack. It doesn’t matter what size, shape or design of the pump its purpose is to move fluids. Head loss that must be overcome makes the task a bit more complicated and the type of pump makes a difference.

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• ### Pump Affinity Laws – Engineering Success

Pump Affinity Laws. Pump affinity laws are very useful for tweaking different aspects of a pump to get the pump characteristics you require or to learn how a similar pump might meet your needs. The affinity laws are an approximation for how characteristics such as RPM, impeller diameter, and flow rate relate to each in a pump.

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• ### Affinity Laws - Production Technology

2017-5-1 · The affinity laws, also known as “Pump Laws”, for pumps are used to express the relationship between variables involved in pump performance (such as head, flow rate, shaft speed) and power. According to the affinity laws, the following relationships exist between the actual speed of the centrifugal pump and its most important performance ...

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• ### Centrifugal Pump Affinity Laws Calculation - Chemical ...

2020-10-27 · Centrifugal pump Affinity laws are set of mathematical equations correlating the Flow Rate, Head, Brake Horse Power, Speed and Impeller Diameter of the pump. Pump efficiency is considered as a constant and variation in speed and impeller diameter is analyzed for the variation in above said parameters. Using the new set of data derived from pump ...

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• ### Affinity laws - Pump Calcs

Pump engineering calculations of brake horsepower, power, kilowatts, motor, motors, voltage drop, circular mills, transformers, turns ratio, ohms law, dc power ...

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• ### What You Need to Know About Pumping At Work Laws

2019-5-15 · Here are a few examples of state laws that regulate employers’ obligations for allowing new mothers to pump breast milk. State Law Example – District of Columbia The D.C. law protecting the rights of breastfeeding mothers to express milk at work is more expansive than the federal law.

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• ### Basic Pump Parameters and the Affinity Laws

2020-4-10 · Basic Pump Parameters and the Affinity Laws Instructor: Randall W. Whitesides, P.E. 2012 PDH Online | PDH Center 5272 Meadow Estates Drive Fairfax, VA 22030-6658 Phone & Fax: 703-988-0088 www.PDHonline.org www.PDHcenter.com An Approved Continuing Education Provider

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• ### Pump Performance Curves and Similarity Laws

2003-8-25 · Will the NPSH of the pump of Fig. 11.7a at 20,000 gpm work? Applying the previous equation we obtain. The pump will work because the system NPSH as shown in Fig. 11.7a is 30 ft which provides a 6.3 ft safety margin. Conversely, the pump could be located as close as 3.7 ft below the water surface and meet NPSH requirements. Pump Similarity Laws

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• ### Affinity laws - Wikipedia

2021-3-17 · The affinity laws (Also known as the 'Fan Laws' or 'Pump Laws') for pumps/fans are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric flow rate, shaft speed) and power.They apply to pumps, fans, and hydraulic turbines.In these rotary implements, the affinity laws apply both to centrifugal and ...

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• ### Pump Affinity Laws | Neutrium

2020-7-25 · The pump affinity laws can be used to predict the performance of a centrifugal pump as two variables change, the pump shaft rotational speed and the pump impeller diameter. They are useful particularly for the modification of existing pumps to meet a new service. These relationships are approximate and rely on the assumption that the pump ...

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• ### Quick Guide to Applying Fan & Pump Laws

2020-2-20 · Pump Laws. After completing the initial measurements of fan performance, you can use fan laws to determine. 1. How much to change the impeller size 2. What the new hydronic flow will be 3. What the new pump rpm will be 4. What the head pressure will increase or decrease to 5. What the new pump motor amperage BHP will be 6.

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• ### Centrifugal Pumps | Engineering Library

Pump Laws. Centrifugal pumps generally obey what are known as the pump laws. These laws state that the flow rate or capacity is directly proportional to the pump speed; the discharge head is directly proportional to the square of the pump speed; and the power required by the pump motor is directly proportional to the cube of the pump speed.

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• ### Affinity laws | KSB

The relationships established between the physical quantity of the original and that of the model by means of the characteristic coefficients are called affinity laws. Using characteristic pump parameters such as the impeller diameter (D), rotational speed (n ), acceleration due to gravity (g) and the density of the fluid handled (ρ), various ...

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• ### Affinity Laws and Their Use in Mag Drive Pump

2014-12-24 · Affinity laws in mag drive operation are used to “express the relationship between variables involved in pump or fan performance such as head, flow rate,” etc. These laws help mag drive pump operators to more closely predict the head discharge when delivered at …

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• ### Pumping at Work Laws in the U.S. | Mamava | Mamava

2021-5-12 · Breastfeeding Laws: At Work. Federal law offers some protections for breastfeeding women in the workplace. In 2010, section 7(r) of the federal Fair Labor Standards Act (FLSA) was amended to include Break Time for Nursing Mothers. The law requires employers to provide non-exempt (i.e. hourly) breastfeeding employees with reasonable break time and a private lactation space that is not a …

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• ### Pump Performance Curves and Similarity Laws

2003-8-25 · Will the NPSH of the pump of Fig. 11.7a at 20,000 gpm work? Applying the previous equation we obtain. The pump will work because the system NPSH as shown in Fig. 11.7a is 30 ft which provides a 6.3 ft safety margin. Conversely, the pump could be located as close as 3.7 ft below the water surface and meet NPSH requirements. Pump Similarity Laws

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• ### Pump Performance - an overview | ScienceDirect Topics

The relationships of rotodynamic pump performance parameters of flow, head and power absorbed to speed are known as the affinity laws. The equations that explain these are known as affinity laws. Flow rate (Q) is proportional to rotational speed ( N ), Q ∞ N. Head (H) is proportional to the square of the rotational speed, H a N 2 .

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• ### FURTHER EVALUATION OF THE MODIFIED AFFINITY

2019-11-25 · The pump performance data from published literature [2] was utilized to further evaluate the modified affinity laws .The pump under consideration delivers 580 gpm with pressure head of 80 feet of water at the best efficiency point. It has specific speed of 3200. Three

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• ### 50 Dumb Laws From Across the United States -

2017-12-1 · It is illegal for drivers to pump their gas in the state of Oregon. The law was passed in 1951 and seeks to reduce fire accidents caused by mishandling of flammable material by untrained personnel, and anyone violating this law is liable for a 500 fine. The law states that only the owner, pump operator or employee is allowed to pump the gas.

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• ### Pump Affinity Laws | Neutrium

2020-7-25 · The pump affinity laws can be used to predict the performance of a centrifugal pump as two variables change, the pump shaft rotational speed and the pump impeller diameter. They are useful particularly for the modification of existing pumps to meet a new service. These relationships are approximate and rely on the assumption that the pump ...

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• ### Pump Affinity Laws by CENTRIFUGALPUMP.COM and

2019-8-15 · Pump Affinity Laws are equations of proportionality that indicate how a change in impeller diameter [D], or rotative speed [N], affects the capacity [Q], the differential head [H], and the required brake horsepower [HP] of a centrifugal pump. Affinity Laws are also known as Affinity Equations. According to Affinity Laws:

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• ### Quick Guide to Applying Fan & Pump Laws

2020-2-20 · Pump Laws. After completing the initial measurements of fan performance, you can use fan laws to determine. 1. How much to change the impeller size 2. What the new hydronic flow will be 3. What the new pump rpm will be 4. What the head pressure will increase or decrease to 5. What the new pump motor amperage BHP will be 6.

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• ### Affinity Laws for Pumping Systems (ALPS) - Part One ...

2011-12-17 · Here Q represents flow, N is rotational speed, D is impeller diameter, H is pump differential head, and BHP is required pump brake horsepower.. My problem was that, unknowingly, I misapplied these laws early in my pump career because of a common misunderstanding: these simple relationships are only meant to be used on pump curve predictions or when system curves fit the general form of H …

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• ### Pump Affinity Laws and Energy Savings | Pool Side

2021-5-3 · Variable speed and flow technology is designed using Pump Affinity Laws to determine the most efficient point of operation based on a given application. As a result, variable speed and flow pumps can save pool owners up to 90% in energy costs. At the same time, variable speed pumps can run longer and slower than a single-speed pump. ...

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• ### Pump Head – Performance Curve of Centrifugal Pump

2021-5-6 · The centrifugal pump is a very capable and flexible machine. It is not necessary to design specific pump for each specific system. The performance of centrifugal pump can be changed by the change in impeller diameter or its rotational speed.The affinity laws, or the pump laws, state how such changes influence the performance of the pump.These laws are summarized in the following points.

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• ### How to Navigate Pumping-at-Work Laws at Your

What Laws Are in Place to Support Nursing Mothers at Work? Your primary protection comes by way of the Reasonable Break Time for Nursing Mothers provision, which was passed in 2010 as part of the Affordable Care Act. This law provides covered employees with the right to time and a private space to pump at work during the first year of their ...

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• ### providing insights for today’s hvac system designer ...

2021-5-13 · Affinity (Fan and Pump) Laws What is the effect of a changing speed? Engineers use a ’shorthand’ for estimating the effect of speed (rpm) on power. This method is referred to as the affinity laws or fan and pump laws. When a fan operates in an unchanging system, the fan laws tell us that the airflow varies proportionally to fan rpm, static

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• ### VARIABLE SPEED PUMPING - Energy

2013-5-2 · Figure ES-5). The operating point of the pump, relative to its best efficiency point, remains constant and the pump continues to operate in its ideal region. The Affinity Laws are obeyed, which means that there is a substantial reduction in power absorbed accompanying the reduction in flow and head, making variable speed the ideal control method.

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• ### Frequently Asked Questions – Break Time for Nursing ...

2020-8-13 · About the Law. The Patient Protection and Affordable Care Act (P.L. 111-148, known as the “Affordable Care Act”) amended section 7 of the Fair Labor Standards Act (“FLSA”) to require employers to provide “reasonable break time for an employee to express breast milk for her nursing child for one year after the child’s birth each time such employee has need to express the milk.”

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• ### Pump Affinity Laws - contractors unlimited

The Pump Affinity laws predict the affects of changing the speed of a centrifugal or rotary pump on flow rate, head and power. Being able to predict these affects allows the rotating equipment engineer to examine the effects before implementing the changes. The laws can be summarised as follows Flow rate is directly proportional to pump ...

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• ### Affinity Laws | Pump Corrosion & Technology

Many pumping applications require a pump to be operated at speeds that are different from the published performance curves. The affinity laws are mathematical relationships that allow the performance of a pump to be determined at these different speeds. The affinity laws are applied to a specific point on a performance curve.

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• ### Affinity Laws for Pumping Systems - Pump Calcs

ALPS cannot handle the complication of a control valve in the pump's discharge line. ALPS is only valid for small, i.e. 0 to 10% changes in speed or impeller diameters, similar to the affinity laws. ALPS results are only estimates. If a more detailed analysis is required, you should graphically analyze the pump …

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• ### Centrifugal Pump Minute: Affinity Laws - Empowering

2018-8-20 · Centrifugal Pump Minute: Affinity Laws. By: Cieana Detloff. In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, discusses the Affinity Law formula that can be used to predict pump performance when changing speeds. Using the Griswold test lab, James provides a real-world example of the accuracy of the Affinity Law. ...

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• ### CEATI Pump Handbook

2011-5-30 · Pump Affinity Laws 34 b. Cavitation 38 7 Pump Controls 41 a. Throttle Valves 41 b. Bypass Valves 43 c. Pump Speed Control 44 d. Multiple Pump Configurations 47 e. Pump Output Power 48 8 Introduction to Adjustable Speed Drives 49: a. Adjustable Speed Drive Operating ...

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• ### FUNDAMENTALS OF FLUID MECHANICS Chapter 12

2014-5-22 · Example 12.2 Centrifugal Pump Performance Based on Inlet/Outlet Velocities zWater is pumped at the rate of 1400 gpm through a centrifugal pump operating at a speed of 1750 rpm. The impeller has a uniform blade length, b, of 2 in. with r 1 = 1.9 in. and r 2 = 7.0 in., and the exit blade angle is β=23º . Assume ideal flow conditions and that the

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• ### Laws protect moms' right to pump at work, but the

2017-8-7 · Laws protect moms' right to pump at work, but the reality is more complicated. By By Amy Joyce. The Washington Post | Aug 07, 2017 at 9:47 AM . Crystal Early's son took to …

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• ### Pump Ed 101

2016-11-12 · Hertz is an Excel program that allows you to illustrate the laws of affinity, perform a design point calculation, and plot centrifugal pump performance curves as a function of frequency or RPM. It is named for the German physicist, Heinrich Hertz, who discovered the very low frequency electromagnetic radiation we now call radio waves.

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• ### What the law says about breastfeeding and work |

2018-8-10 · What the law says about breastfeeding and work. The federal Break Time for Nursing Mothers law requires employers covered by the Fair Labor Standards Act (FLSA) to provide basic accommodations for breastfeeding mothers at work.

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• ### Pump-and-Dump Definition - investopedia.com

2021-1-28 · Pump-and-dump is an illegal scheme to boost a stock's price based on false, misleading, or greatly exaggerated statements. Pump-and-dump schemes usually target micro- and small-cap stocks.

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• ### Pump Affinity Laws - contractors unlimited

The Pump Affinity laws predict the affects of changing the speed of a centrifugal or rotary pump on flow rate, head and power. Being able to predict these affects allows the rotating equipment engineer to examine the effects before implementing the changes. The laws can be summarised as follows Flow rate is directly proportional to pump ...

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• ### Centrifugal Pump Minute: Affinity Laws - Empowering

2018-8-20 · Centrifugal Pump Minute: Affinity Laws. By: Cieana Detloff. In this Centrifugal Pump Minute, James Farley, Griswold Product Manager, discusses the Affinity Law formula that can be used to predict pump performance when changing speeds. Using the Griswold test lab, James provides a real-world example of the accuracy of the Affinity Law. ...

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• ### Pump & System Curve Data for Centrifugal Pump

2019-7-29 · Pump affinity laws can be used for resizing impellers on pumps known to be providing excessive system flows. However, system curve analysis methods provide more definite procedures. Pump affinity laws c an also be applied to pump selection for speeds different than the …

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• ### CEATI Pump Handbook

2011-5-30 · Pump Affinity Laws 34 b. Cavitation 38 7 Pump Controls 41 a. Throttle Valves 41 b. Bypass Valves 43 c. Pump Speed Control 44 d. Multiple Pump Configurations 47 e. Pump Output Power 48 8 Introduction to Adjustable Speed Drives 49: a. Adjustable Speed Drive Operating ...

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• ### Centrifugal Pump Curves - CheCalc

2020-1-13 · Centrifugal Pump Curves estimate pump performance at different impellor diameter and speed based on Affinity Laws.

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• ### New laws could pump billions of dollars into Permian

2019-8-2 · The laws, which essentially clarify water rights issues and encourage the reuse of water, could pump billions more dollars of investment into the region’s rapidly growing water recycling industry.

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• ### VFD for Centrifugal Pumps - Variable Speed Drives

For variable speed operation however, the affinity laws predict that the centrifugal pump curve will shift downwards for reduced speed and the efficiency curve will shift to the left in such a way that efficiency will remain constant relative to points on the pump curve for reduced flows. Fig. 6 Fixed Speed Pump Efficiency Flow Control Techniques

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• ### Common Gas Law Experiments Collapsing Balloon

2010-5-11 · Vacuum pump Peeps, shaving cream, bag of chips Procedure: Place object inside bell jar. Turn on vacuum pump and observe the physical change in the object as air is removed from the bell jar. Turn off pump and return bell jar to atmospheric pressure observing again the change in …

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• ### What the law says about breastfeeding and work |

2018-8-10 · What the law says about breastfeeding and work. The federal Break Time for Nursing Mothers law requires employers covered by the Fair Labor Standards Act (FLSA) to provide basic accommodations for breastfeeding mothers at work.

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• ### Pump Action Shotgun Laws | New Jersey Hunters

2017-3-16 · Hello Everyone! One of my guns is a Pump Action Winchester SXP Marine Defender. I want to put a pistol grip and adjustable stock on it. I was looking at the NJ gun laws and couldn't find any restrictions to Pump action shotguns, only magazine fed/semi auto shotguns.

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