Air Compressor cfm calculator
Hotshot
Joined: Oct 2004
Posts: 15,882
Likes: 88
From: Durham NC
There might be, but it would be dependent on the design (single stage, dual stage, # pistons, oil or oiless, motor voltage and RPM would make a difference in efficiency IMHO), but you might check the manufacturer's web site cfm@ 40psi is usually given in their specs. How much you looking for? A compressor that big will probably run anything but a big sandblaster if it's got a 60gal+ tank. Things to keep in mind:
compressor specs are usually inflated (no pun intended!) They are measured at the compressor outlet without restriction or a load, by the time you add in a regulator, plumbed distribution piping, drier, oil extractor, 50' of airhose, and an air tool you be pushing 1/2 or less than the specs thru the tool. Next the airtool manufacturer's spec is usually the min airflow required to make the tool work (barely!) you aren't likely to be very happy with the performance if your compressor is just pushing the minimum needed.
compressor specs are usually inflated (no pun intended!) They are measured at the compressor outlet without restriction or a load, by the time you add in a regulator, plumbed distribution piping, drier, oil extractor, 50' of airhose, and an air tool you be pushing 1/2 or less than the specs thru the tool. Next the airtool manufacturer's spec is usually the min airflow required to make the tool work (barely!) you aren't likely to be very happy with the performance if your compressor is just pushing the minimum needed.
Last edited by AXracer; Jun 5, 2005 at 08:35 PM.
Posting Guru
Joined: Mar 2004
Posts: 1,321
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From: MI
Originally Posted by reamer
15 cfm at 90 psi, is = to ? cfm at 40 psi?
as far as on output of a compressor you probably would not see much more than 3 to 4 cfm.
Posting Guru
Joined: Sep 2004
Posts: 1,616
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From: Sapulpa OK
Without the manufacturers horsepower curve anything else is just guessing. As pressure goes down volumnmetric efficiency goes up. Just how far is dependant on design criteria. Eg. Bore size vs Stroke and valve flow rates. Also two stage vs, single stage ?????????
Contact the manufacturer.
Contact the manufacturer.
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