Question about Air Tools & Compressors
The best way to determine how the compressor is doing is with a pump up test. Time how long it takes the compressor to pump up from one pressure to another. If you know the tank size, you can then compute the air delivery of the compressor:
CFM=(Pressure Change / 14.5) x (tank size in gallons / 7.48) x (60 / time in seconds)
I'd recommend start timing about 40 or 50 PSI and pump up to shutoff.
If your compressor has no aftercooler (it probably doesn't) this should read a bit higher than your 7.8 CFM FAD because the air will be hot, but it will get you in the ballpark.
If compressor seems OK, tool could be worn or fed too high a pressure (if you put 120 PSI to a tool, it will use quite a bit more air than it is rated for - they are usually rated for about 90). If your compressor maintains pressure at 95 or 100, but doesn't gain ground, everything is probably OK. I'd just add a pressure regulator to maintain 85 or 90 to the tool in that case.
Posted on Apr 02, 2011
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Posted on Jan 02, 2017
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