pump curve 2

[Nivrah]

hello all,
just wondering if anyone has the following pump curve:
PUmp: worthington
Model:6LR-13A
Rpm: 1475
kW: 30

thanks,

 

[BigInch]

We can probably make a close one, if you can't find it.

What would you be doing, if you knew that you could not fail?

 

[Nivrah]

BigInch,
i'll be happy with a good approximate.
its an old pump in the turbine room and unsurpringly the pump curve is nowhere to be found in our system.

 

[BigInch]

What can you read on the nameplate, anything?
BEP flow? head?

What would you be doing, if you knew that you could not fail?

 

[Artisi]

It's amazing what google can do for you - you should try it some time.

http://www.wcc.nrcs.usda.gov/ftpref/wntsc/Pump Curves/Worthington/1200/6LR-13A.pdf

the curve is at 1175 RPM but you can scale it using the affinity laws

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[BigInch]

Ya a 1.28 x BEP_Head rise to shutoff. A perfect template.

What would you be doing, if you knew that you could not fail?

 

[nfinit]

Artsi, that link just sent me to a jackpot of curves, that's awesome. I love google. Although now I don't remember anything because I just rely on tech to remind me...

 

[Nivrah]

BIg Inch,
nothing else is available from the nameplate. How would you have contructed it anyway?

 

[BigInch]

It's not too hard to reverse engineer a curve with a surprizingly little amount of information. A basic quadradic curve can be drawn with the assumption Head at BEP and a 1.28 rise to shutoff, which will catch a whole lot of pumps, and that can be refined with a few other bits here and there. Start with assuming a typical centrifugal curve class. The curve number itself already gives away that it's a 13" impeller and a 6" diameter discharge. The more extra bits if info you can find out, the better the final curve. Estimating flow by assuming 10 fps at suction and 22 fps at dischage, is one example. Bouncing tangential velocity and head calculated from that, off the rpm and impeller diameter and estimated flowrates, eventually the bits start falling in place.

What would you be doing, if you knew that you could not fail?

 

[Nivrah]

Artisi,
Thanks a lot for being a search whiz.
The curve u provided will do.

 

[stanier]

I believe that Kelly & Lewis took over Worhtington pumps and these were subsequently bought by Flowserve. If you need parts you could contact Flowserve.

"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.

http://waterhammer.hopout.com.au/

 

[Artisi]

Nivrah,
The 1170rpm curve is all you need to redraw a 1480rpm curve to give you accurate information, if you need assistance please ask - we can guide you in how to do it.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[Nivrah]

Artisi,
I will use affinity laws to change the data points (head) to suit 1480 RPM.