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deepesh
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Join Date: Apr 2014
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Coriolis-Type Flow Meter Issue

04/12/2019 12:51 AM

We are having two type liquid sulfur loading pumps (Centrifugal and gear pump) .It has been observed that when centrifugal pump used to transfer liquid sulphur mass flow meter works fine but in case of gear pump it goes to IOP and shows drive override .Please suggest,
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SolarEagle
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#1

Re: Coriolis type flow meter issue

04/12/2019 1:35 AM

I suggest you don't use the gear pump....Is this molten sulfur? Is the gear pump internal or external? Are these pumps using the same lines? Is the gear pump installed above or below the process piping? Horizontal or vertical mounted? What pressures are you operating at? What differences are there between the pumps other than type of pump? Is there any air or gases in the lines? Is the gear pump recently new or maintained?

https://control.com/thread/972958635

https://www.global.weir/newsroom/news-articles/navigating-the-business-of-dirty-sulphur-pumps-important-considerations/

https://www.michael-smith-engineers.co.uk/resources/useful-info/gear-pumps

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Anonymous Poster #1
#2

Re: Coriolis type flow meter issue

04/12/2019 3:21 AM

https://www.acronymfinder.com/IOP.html
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lyn
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#3

Re: Coriolis-Type Flow Meter Issue

04/12/2019 1:05 PM

You DID call the manufacturer of the Coriolis-Type Flow Meter didn't you?

If not, do it now!

They, and only they, are qualified to answer your question.

All this is a waste of time.

Make that call, now!
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Rixter
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#4

Re: Coriolis-Type Flow Meter Issue

04/12/2019 3:23 PM

It could be the gear pump is generating vibrations that affect the Coriolis flow meter.

https://www.bronkhorst.com/blog/how-to-deal-with-vibrations-using-coriolis-mass-flow-meters/
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PWSlack
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#8
In reply to #4

Re: Coriolis-Type Flow Meter Issue

04/15/2019 7:42 AM

...and it might not. Without the Original Poster coming back to the forum with a definitive answer from the flowmeter manufacturer, the forum is not in a position to know.

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PWSlack
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#12
In reply to #4

Re: Coriolis-Type Flow Meter Issue

04/15/2019 11:14 AM

[Comment withdrawn at edit.]

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SolarEagle
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#5

Re: Coriolis-Type Flow Meter Issue

04/12/2019 4:28 PM

It might be that the controller is not set for the higher pressure that the gear pump may be producing....check the parameters...

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PWSlack
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#9
In reply to #5

Re: Coriolis-Type Flow Meter Issue

04/15/2019 7:43 AM

...and it might not. Without the Original Poster coming back to the forum with a definitive statement on the flowmeter, the forum is not in a position to know.

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lyn
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#6

Re: Coriolis-Type Flow Meter Issue

04/12/2019 5:23 PM

It's picking up Good Vibrations from the gear pump, causing it to OIP/IOP/IPO, whatever.
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PWSlack
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#10
In reply to #6

Re: Coriolis-Type Flow Meter Issue

04/15/2019 7:44 AM

One hopes it isn't pumping TLAs...

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rwilliams
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#7

Re: Coriolis-Type Flow Meter Issue

04/12/2019 11:16 PM

If you can find a manufacturer of suitable flexible expansion or vibration isolators for that temperature and pressure, it might help to reduce the vibration transmitted.

The manufacturer installation instructions are typically quite specific on piping construction and methods, there could be some good suggestions there.

I'm impressed you found a supplier for molten sulfur coriolis meter. It may be that a different pitch or speed of the gear pump might get you off what appears to be a critical frequency of the flow tube loop excitation.
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PWSlack
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#11

Re: Coriolis-Type Flow Meter Issue

04/15/2019 10:20 AM

Without such basic information as flowrates, temperatures and pressures, any WAG will do...

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PWSlack
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#13

Re: Coriolis-Type Flow Meter Issue

04/15/2019 11:16 AM

There are solutions that can be applied. It depends upon the individual flowmeter and the circumstances of its installation, so contact the manufacturer for advice over the telephone.

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Vulcan
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#14

Re: Coriolis-Type Flow Meter Issue

06/25/2019 4:34 AM

Just a guess (or WAG as PWSlack likes to call it):

Since coriolis flowmeters vibrate the flowtube, using a pulsating flow (via the gear pump) probably affects its performance. Putting in a pulse dampener might solve the problem.

regards,

Vulcan

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Users who posted comments:

Anonymous Poster (1); lyn (2); PWSlack (6); Rixter (1); rwilliams (1); SolarEagle (2); Vulcan (1)

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