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Specific Speed of Pump Calculator - EasyCalculation

Calculator. Formula. The specific speed is used to represent the shape of the pump. The specific speed of the pump can be calculated based on the shaft rotational speed, flow rate and head rise. Code to add this calci to your website. Just copy and paste the below code to your webpage where you want to display this calculator.

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Calculate Suction Specific Speed of Pump - EasyCalculation

Pump Suction Specific Speed calculator. The suction specific speed is used to choose the pumps of maximum efficiency which is calculated based on the shaft rotational speed, flow rate capacity and positive suction head.

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Pump Suction Specific Speed calculator ... - EasyCalculation

Formula: N ss = ω * q 1/2 / NPSH r 3/4 Where, N ss = Suction Specific Speed ω = Pump Shaft Rotational Speed q = Flow Rate Capacity NPSH r = Required Net Positive Suction Head for the Pump at best Efficiency Point Related Calculator:

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Specific Speed of Pump Formula - EasyCalculation

Formula: N s = (ω * q 1/2) / h 3/4 Where, N s = Specific Speed ω = Pump Shaft Rotational Speed q = Flow Rate h = Head Rise Related Calculator:

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Pump Specific Speed Calculator - Engineering Units

Pump Specific Speed at Best Efficiency Point Formulas: Imperial Units: N s = ( N * (Q) 1/2 ) / (H) 3/4. where: Ns = specific speed. N = pump speed, rpm. Q = flow, gpm. H = head, ft. Values are taken at best efficiency point (BEP). Pump flow is taken at the largest impeller diameter For double suction impellers pump flow is divided by two. SI Units:

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How to Calculate Pump Specific Speed Pumps Systems

Jan 07, 2015  Depending on the specific speed value in the test, a different type of pump would be expected. A purely radial-flow impeller (Type 1) would be expected if the specific speed were 433. A mixed-flow impeller type (typically used for vertical turbine pumps) would be expected if the specific speed were 1,480. Figure 2. Head versus flow test data.

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Pump Specific Speed Calculation - Chemical Engineering

Nov 23, 2016  N s is Specific speed of the pump Dimensionless. N is Speed of the pump in rpm. Q is the Volume Flow rate of the pump at its best efficiency point – BEP in gpm. H is Discharge head of the pump at BEP in ft. In SI units the formula can be used as. N s = (N * √Q)/ (1.16 * H (3/4) ) Where. Ns is Specific speed of the pump Dimensionless. N is ...

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List of All Fluid-mechanics Formulas - EasyCalculation

Pump Suction Specific Speed calculator. Formula: N ss = ω * q 1/2 / NPSH r 3/4 Where, N ss = Suction Specific Speed ω = Pump Shaft Rotational Speed q = Flow Rate Capacity NPSH r = Required Net Positive Suction Head for the Pump at best Efficiency Point Related Calculator: Pump Suction Specific Speed calculator;

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How to Calculate Pump Specific Speed Pumps Systems

Jan 07, 2015  Depending on the specific speed value in the test, a different type of pump would be expected. A purely radial-flow impeller (Type 1) would be expected if the specific speed were 433. A mixed-flow impeller type (typically used for vertical turbine pumps) would be expected if the specific speed were 1,480. Figure 2. Head versus flow test data.

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Specific Speed Pumps - Engineering ToolBox

Online Specific Speed Pump Calculator. The calculator below can used to calculate the specific speed: n - pump shaft rotational speed (rpm) q - flow rate (m 3 /h, l/s, l/min, m 3 /min, US gpm, British gpm) h = head rise (m, ft) Note! When comparing pumps and their documentation - be aware of the units used.

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Angular speed in terms of specific speed of pump Calculator

The Angular speed in terms of specific speed of pump formula is defined as the ratio of the product of specific speed and head raised to the power of 3/4 to the square root of discharge is calculated using speed_rpm = (Specific speed of a pump *(Head ^(3/4)))/(sqrt (Discharge)).To calculate Angular speed in terms of specific speed of pump, you need Specific speed of a

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Electric pumps power calculation - itieffe

3 - determine to what extent indicate the pump flow rate by choosing from the drop-down menu - cubic meter / hour = 20. 4 - insert the necessary head indicating the value via the drop-down menu - bar = 2. 5 - enter the pump efficiency by choosing it from the values indicated in the table

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Understanding Pump and Suction Specific Speeds

Calculate the pump specific speed from Equation 1 with these determined values. N (3) NQ S H == = 3 4 3550 250 200 1055 0.75, Practical specific speeds range from 500 to 8,000; values reaching 15,000 can be encountered. Figure 2 shows the impeller styles that correspond to the practical range of numbers.

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Specific Speed (Ns) Definition - Intro to Pumps

Specific speed can also be used to predict and evaluate pump efficiency and the shape of the pump performance curve. Higher specific speeds are associated with higher efficiency pumps with efficiency falling dramatically for designs with specific values below 1000. As specific speed increases, BEP tends to skew farther and farther towards the ...

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Pump Sizing and Selection Made Easy - Chemical Engineering ...

Jan 01, 2018  In Equation (16), N (rpm) is the actual pump rotating speed, Q (gal/min) is the pumping capacity, and H (ft) is the total head at the best efficiency point, corresponding to speed N and capacity Q. Suction specific speed (N s, rpm) values — obtained by substituting NPSH a for H — of less than 8,500 rpm are typical for commercially available ...

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CENTRIFUGAL PUMP SELECTION, SIZING, AND

4 • 2 PUMP SELECTION, SIZING AND INTERPRETATION OF PERFORMANCE CURVES 4.1 COVERAGE CHART FOR CENTRIFUGAL PUMPS A coverage chart (see Figure 4-2) makes it possible to do a preliminary pump selection by looking at a wide range of pump casing sizes for a specific impeller speed. This chart

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Pump Ed 101

This calculator allows you to compute lots of pump and motor stuff from catalog and field test data. On the pump side it computes specific speed, suction specific speed, min max acceptable flow, actual pump efficiency and cost per 1000 gallons pumped just name a few.

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Specific speed of a centrifugal pump - YouTube

Mar 27, 2020  1)Find my other videos from the same chapter "Centrifugal pumps" from the given link belowhttps://youtube/playlist?list=PLiGNmnbK1ts2SrgC6hWZ6nIgBSWb...

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Affinity Laws - Pumps! That's what it's about

specific speed. If that is the case then the affinity laws can be used to predict the performance of the pump at different diameters for the same speed or differe nt speed for the same diameter. Since in practice impellers of different diameters are not geometrically identical, the author's of the section called Performance Parameters in the

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Flow of Fluids Excel Workbook - Udemy

6 suction specific speed (nss) 7 specific speed (ns) x. pump affinity laws . 1 impact of speed on flow . 2 impact of speed on head . 3 impact of speed on bhp . 4 impact of impeller diameter on flow . 5 impact of impeller diameter on head . 6 impact of impeller diameter on bhp . 7 pump brake horspower . 8 pump efficiency

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Centrifugal Pump Design Software – AxSTREAM - SoftInWay

Centrifugal Pump Performance Maps Software. This AxSTREAM ® module called AxMAP also uses the meanline and streamline solvers presented but in the present case they are used to automatically generate performance maps for any number of variables; this includes for example the dependency of efficiency on rotation speed and pressure ratio, the influence of throat

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HEAT INDEX CALCULATOR Top Suggestions for Rental Services ...

The calculator will return the Heat Index and other relative information. You may independently clear the values of either calculator to start over. The heat Index does not really occur below 85 degrees F. You should also know that possible increases of up to 15 degrees F are possible in full, open sunlight for more than an hour.

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Suction specific speed (US) - Pump Calcs

Centrifugal Pumps> Suction specific speed (US) Suction specific speed (US) Toggle. Equation Overview Assumptions. Short Long. Input 3 of 4 variables to solve for the unknown. Help: Symbol: Variable: Input: Units: N ss: Suction Specific Speed: N: RPM: Q: Flow Rate: NPSH R: Suction Head Required: Reset. See also: Calculations Specific speed (US) ...

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Four Useful Centrifugal Pump Calculators for Pump ...

Nov 25, 2017  The Suction Specific Speed calculator can be used to determine a centrifugal pump’s suction specific speed (N ss) for a given flow rate (Q), suction head required (NPSHr), rotational speed (N). If you enter any three of these variables as inputs, the calculator will determine the fourth variable.

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Centrifugal Pump Specific Speed Pumps Systems

Jan 18, 2012  Specific speed of pumps is a concept developed for water turbines1 in 1915, which was later applied to centrifugal pumps (Stepanoff, 1948). Specific speed is a way to “normalize” the performance of these hydraulic machines.

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Useful info on specific speed suction specific speed

Whereas Specific Speed relates to a pump’s discharge performance, Suction Specific Speed defines its suction characteristics. In particular, a value indicates the tendency of a pump to become unstable as a result of suction recirculation and cavitation. It can also be used to assess the safe operating range around the BEP.

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Electric pumps power calculation - itieffe

3 - determine to what extent indicate the pump flow rate by choosing from the drop-down menu - cubic meter / hour = 20. 4 - insert the necessary head indicating the value via the drop-down menu - bar = 2. 5 - enter the pump efficiency by choosing it from the values indicated in the table

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Plumbing heating: Pump power formula - Blogger

Mar 13, 2017  Pump Power Calculation Formula Specific speed of a. To verify the discharge head of a pump, a pressure gauge is used. To calculate the new pump speed RPM from an increase or decrease in flow rate, the following formula and calculation can be used. Horsepower for idling a pump: To idle a pump when it is unloaded will require about of it s full ...

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Pumps DEFINITIONS AND CALCULATIONS - Academia

When arriving at the performance of a pump, it is customary to calculate its power output, which is the product of (1) the total dynamic head and (2) the mass of liquid pumped in a given time.. Useful work of the pump is called water (horse)power is defined as WHP = HQρg (EQ-8) WHP= HQsp.gr/3960 Where WHP is in horsepower, H is in feet and Q ...

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Technical Bulletin - Weir Group

Specific speed and impeller diameter The specific speed formula (Ns) for any pump is listed in figure 1 and applies at the pump’s Best Efficiency Point (BEP). The higher a pump’s specific speed, generally the higher its efficiency. To provide the same head-flow coverage for both the AH® pump range and the WBH® pump range,

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Fluid Mechanics Calculators List of Fluid Mechanics ...

Fluid Mechanics calculators give you a List of Fluid Mechanics Calculators. A tool perform calculations on the concepts and applications into Fluid Mechanics.

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Affinity Law - an overview - ScienceDirect

Predictions for speed changes are fairly accurate throughout the range of speed changes. However, they tend to be accurate for diameter change of ± 10%, because changing the diameter also changes the relationship of the impeller to the pump casing.Thus, for a 10% increase in either diameter or speed, the flow will increase by 10%, TDH by 21%, and the BMP by 33%.

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Educational Services and Training - Flowserve

Flowserve Educational Services understands each member of your operation, maintenance, and/or reliability crew is essential. Whether your needs include training new hires, enhancing your current workforce’s skills, or helping your crew understand new motion control technologies or products, we’ve got you covered.

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Square-root-Square-root Formula Ease Saturated ... - Blogger

Jun 12, 2008  Earlier post "Conduct Steam-Water Balance MANUALLY using Water97_v13" has discussed the saturate steam - condensate temperature can be extracted using a special function, tSat(P) in Excel Add-on in (Water97_v13.xla or Alternative download).Of course, HYSYS has the capability of predicting the saturated steam-condensate temperature. The Saturation

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Fan rpm to cfm calculator

Air Flow Rate Calculator CFM Calculation. Air flow or cubic feet per minute (CFM) is an estimation of the measure of air per unit of time that passes through a specific medium (Eg; It can be calculated based on the known values of cubic inch displacement, engine speed and volumetric efficiency. Easycalculation DA: 23 PA: 50 MOZ Rank: 82

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HEAT INDEX CALCULATOR Top Suggestions for Rental Services ...

The calculator will return the Heat Index and other relative information. You may independently clear the values of either calculator to start over. The heat Index does not really occur below 85 degrees F. You should also know that possible increases of up to 15 degrees F are possible in full, open sunlight for more than an hour.

Get price