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The document discusses the importance of gasket and seal inner diameters matching nozzle or valve diameters, as gaps over 1mm could impact measurement performance. It also explains that defining a limit on agitator rotation speed is difficult, as turbulent surface depends on many factors, and recommends testing to determine limits. An attached knowledge article provides more information on maximum agitator rotation with FMR instruments.

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Shin Bo
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39 views1 page

Note

The document discusses the importance of gasket and seal inner diameters matching nozzle or valve diameters, as gaps over 1mm could impact measurement performance. It also explains that defining a limit on agitator rotation speed is difficult, as turbulent surface depends on many factors, and recommends testing to determine limits. An attached knowledge article provides more information on maximum agitator rotation with FMR instruments.

Uploaded by

Shin Bo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
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Important would be inner diameter of the gaskets or seals.

Ideal and this is what


we recommend would be that the inner diameter of the gasket/seal has the same inner
diameter as the nozzle respectively the ball valve. If this is not the case and the
gap at the transitions would be more than 1mm it could respectively will influence
the performance of the measurement.

Regarding rotation speed of an agitator, it is difficult to define a limit. I’ve


never heard that 60 RPM is the limit, otherwise we cannot measure reliable anymore.
A turbulent surface depends on different factor like the design of such an agitator
(how many stages, how big are the blades), how big is the vessel itself, the
viscosity of the medium, etc. We can not say in general 60 RPM is the limit. Of
course FMR6x (80 GHZ) has a smaller beam angle and therefore a smaller footprint
and might be a little bit more sensitive than FMR5x (6/26 GHz) but overall there is
not really a different between both. But at the end you have to test it, it’s
difficult to make a statement here.

See also attached knowledge article (under the category “Related”) with more
information about max. rotation of agitator with FMR.

Hope this helps.

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