CFM vs Pressure
by Abhivansh
I have been thru ur site and learnt that increasing pressure means decrease in cfm and vice-versa but it seems there is no direct factor(number) of relation between them, so calculating my requirements against standard available models is difficult. I would like to know if there is a chart / graph available on this site or otherwise that shows the relation between decreasing CFMs with increase in pressure???? Bill says... Thank you for visiting the pages on my site, Abhivansh. An increase in pressure does not necessarily mean a lessening of flow. As long as the flow required is within the capacity of the compressor to produce it, you can increase and / or reduce the downstream pressure with no loss of flow. When you are dealing with smaller DIY type air compressors, they are low flow to begin with, and they have a capacity reduction when you the pressure is high over when the output pressure is low. If you have a 200 HP compressor, and you have a downstream application for 50 CFM @ 60 PSI, and then you decide that you need 50 CFM @ 80 PSI, you will not have a lessening of flow at the higher pressure, as the compressor has the capacity to deliver that flow. Cheers, Bill
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