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How to draw npsh curve Videos

How To Read A Pump Curve Vol 4

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User Comments

gabigowriel commented on 02 Sep 2012

@anchorsales I have a pump that can pump 10m3 of water per hour at a head pump of 15 meters(flanges of 38 mm diameter for inlet and outlet). I want to pump water through a serpentine with a length of 18 meters and 50 "elbows" of 90 degrees with a pipe diameter of 15 mm made of copper. Could this pump do the job(pump at least 2 liters/minut) or the head pump is not enough and the flow would stall before exiting the 18 meter pipe? Thank you kindly!

BZdaKritta commented on 10 Oct 2012

do u know of any resources that will help me learn more of these priciples .. i have a friend that has some positions open for applications engineer and I have absolutely no experience or schooling in dealing with these concepts.. but if i can get up to par I have a job waiting.. thnx for ur input

Alexander Molins commented on 20 Sep 2013

Excellent! A simple and concise explanation that anyone with some technical/engineering background can understand and appreciate. Thank you.

Markzzz commented on 02 Dec 2012

he says y-axis twice... x-axis is on the bottom, just so everyone knows :P great video either way!

Naeem-ul-Hasan Saddiqi commented on 25 Mar 2013

follow this link, it will clear some of your problem youtube.com/watch?v=-K1zvzQX9eU

Andy Nguyen commented on 07 May 2013

Thanks! Your tutorial was straight forward and it was easy to understand

H.C.S. Botch commented on 15 Dec 2015

the music was great

adasand21 commented on 04 Aug 2012

can you do fan curves

karthick nagarajan commented on 25 May 2013

Thanks

System Head Curves: How To Have A Successful Pumping System

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Using the system curve for pump sizing

ME3663 Turbomachinery 2

review pump performance curves 0:27, cavitation in pumps 3:24, net positive suction head 5:17, problem, calculate NPSHA 9:10, read NPSHR from pump ...

User Comments

cbh148 commented on 07 Dec 2015

Man, I've learned so much from this video. Wish my professor used this style of approach, with the questions and the pacing and the conciseness. . . Still struggling to wrap my brain around the reason for the answer of the 3 pump parallel question (18:40) and the plotting of afinity lines (my textbook provides pump curve plots in the back but it's just the pump curves for different impeller diameters and one efficiency curve, then of course the NPSH and power curves on plots underneath).

cbh148 commented on 08 Dec 2015

+Randall Manteufel Thanks for the reply! Ok based off what you said, I think I'm now seeing that these 3 pumps in parallel must all be rotating on one single axle, thereby meaning each impeller shares the same RPM, thereby meaning that the maximum head that the system can reach is limited to the lowest head that one of the pumps can produce.Before, I was thinking of parallel pumps as being independent, like, say, the twin turbo setup on a Nissan 300zx.

Randall Manteufel commented on 08 Dec 2015

+cbh148 hope this additional explanation helps: for the problem with 3 pumps in parallel, the weakest pump is capable of producing a maximum head (at zero flowrate) that is lower than the needed head, so don't use it. Thanks for your positive feedback.

12. System curve

How to plot a system curve and how to use it. www.pumpfundamentals.com.

User Comments

Jonathan Buckman commented on 18 Jan 2015

What would happen to the system curve if you ran another length of pipe of the exact same specifications parallel to it and used a WYE or TEE to connect your pump to a common manifold right off the pump where it's output could flow down both pipes. Would this flatten out the system curve for more flow at same pressure? Would it be the square of the flows at each pressure from your original system curve?