Does K-factor for a vortex flowmeter depend on the Process Fluid?

[plantprowler]

I am using a Rosemont vortex flowmeter (8800 series)and that comes with a K-factor stamped on a nameplate.

Now, obviously, a vortex type meter is not a true mass flow sensor (e.g. a Corolois) but a volumetric flow meter. Now my question is suppose the original fluid changes from A to B (both liquids) does the K-factor change too or not?

The meters are originally all calibrated on water but what I am not sure is whether the K-factor they stamp takes into account any other properties of the fluid for which the meter was ordered for.

 

[Latexman]

Is this for pressure drop? (Rosemount used A, not K, in my documents) If so, I believe the Reynolds number has to be over 5,000 for those meters to work. Since flow must be turbulent, the K-factor should not change for the two liquids.

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

 

[plantprowler]

Thanks @latexman.

No not pressure drop. But for flow measurement.

http://www2.emersonprocess.com/siteadmincenter/PM Rosemount Documents/00813-0100-4004.pdf

Flow calibration
Meter bodies are flow-calibrated and assigned a unique
calibration factor (K-factor) at the factory. The calibration factor
is entered into the electronics, enabling interchangeability of
electronics and/or sensors without calculations or compromise
in accuracy of the calibrated meter body

 

[Latexman]

Note 1. Process temperature and pipe ID have known effects on the K-factor. The Rosemount 8800D software automatically accounts for these effects by compensating the K-factor.

No mention of fluid properties. I'd call my Rosemount rep. if I was you.

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

 

[plantprowler]

No mention of fluid properties. I'd call my Rosemount rep. if I was you.

I did! But the quality of their reps seems so bad that I'd rather trust a smart anonymous person on a forum than them!

Seriously, I get the feeling that unless you are buying hundreds of thousands worth of hardware the Suppliers shovel you to some newbie tech who has barely any idea.

 

[Latexman]

Call Rosemount and ask for technical support or THE product engineer for the 8800 flow meter. When I get someone on the phone, I ask them, "are you THE technical authority for my flow meter?" If they are, you'll get good answers.

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

 

[LittleInch]

This data sheet for the 8800 mentions changes in K factor for temperature, pipe ID and non ideal upstream and d/stream straights, but nothing bout fluid type so I assume it's not an issue.

http://www.google.co.uk/url?sa=t&rc...iBxdCR4-LQAhUC2BoKHRKnAVgQFggrMAM&url=http://

http://www.emerson.com/resource/blo...RwlPlOAm-Z-u_A&bvm=bv.140496471,d.d2s&cad=rjt

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[hacksaw]

The meter measures volumetric flow given you satify the Reynolds number requirements. The mass flow will obviously vary with the fluid.