Does Capillary Diameter Affect Flow Rate Stability in a Decreasing Vacuum?

taggart · Jun 23, 2010

we vacate a cannister using a vacuum pump using a range from 200-900 mbar of vaccum. Will the flow rate remain constant as the vacuum decreases over 24 hrs or does it tail off at a given pressure, a capillary of diameter 0.102mm is used ?

Andy Resnick · Jun 23, 2010

http://www.engineeringtoolbox.com/vacuum-evacuation-time-d_844.html

Re-arranging the expression shows the pressure in your cannister decreases exponentially.

Does that help?

Does Capillary Diameter Affect Flow Rate Stability in a Decreasing Vacuum?

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Does Capillary Diameter Affect Flow Rate Stability in a Decreasing Vacuum?

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