PD vs centrifugal pumps- Maximum viscosity range

[PalomaP]

Maximum viscosity ranges are a major consideration in pump selection because of possible deterioration in performance wiht increasing viscosity.
In general terms, which are the limits in viscosity range for using a pd or a centrifugal pump?
I would like to find a CHART or TABLE which shows pump classification acording the viscosity range.ç
Thanks a lot in advance

 

[BigInch]

Centrifugals need to start being downgraded when viscosity gets to around cP = 500 and things start to get problematic at 1200+, but then a lot of other things get complicated at that range too. Since much of that depends on the fluid, not to mention the piping system probably much more so than what kind of pump you want to use, there is little to be gained by classifying pumps for cP of a fluid.

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"Pumping accounts for 20% of the world’s energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies)

http://virtualpipeline.spaces.live.com/

 

[PalomaP]

Thanks BigInch

By any chance... do you know a good web for viscosity conversion (ssu, cts, cp, mm2/sec ...)on line?

And in general, for engineering units conversion? In the past you gave a good one,but i cannot find it!

 

[BigInch]

Paloma, Hace rato, no?

The best online unit converter is offline now. I think we burned their servers up.

Actually the best thing to do is to get a copy of Katmar's Uconeer and put the icon on your desktop. Its simply the most brilliant engineering unit converter you'll find anywhere online or off .... and its free!

http://www.katmarsoftware.com/uconeer.htm

**********************
"Pumping accounts for 20% of the world’s energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies)

http://virtualpipeline.spaces.live.com/