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Time to fill air compressor tank, ? standards?

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Time to fill air compressor tank, ? standards? powerdoc 10-28-2007
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Posted by powerdoc on October 28, 2007, 7:05 pm
I recently purchased a used compressor and when I cranked it up the
first time it seemed to take longer than I expected to reach a full
tank @ 100psi. My prior compressor did have a smaller tank but also
had a smaller compressor size. Are there any standards of how fast a
compressor that does about 10 scfa/m @90psi should take to fill a 25
gal tank?


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Posted by Larry Bud on October 28, 2007, 8:39 pm
> I recently purchased a used compressor and when I cranked it up the
> first time it seemed to take longer than I expected to reach a full
> tank @ 100psi. My prior compressor did have a smaller tank but also
> had a smaller compressor size. Are there any standards of how fast a
> compressor that does about 10 scfa/m @90psi should take to fill a 25
> gal tank?

25 gallons is 3.34 cubic feet.

What's "scfa"?


Posted by Richard J Kinch on October 28, 2007, 11:39 pm
powerdoc writes:

> Are there any standards of how fast a
> compressor that does about 10 scfa/m @90psi should take to fill a 25
> gal tank?

No. Purely a function of horsepower versus tank size, which are
independent variables.

http://www.truetex.com/aircompressors.htm

Posted by Richard J Kinch on October 28, 2007, 11:49 pm
powerdoc writes:

> Are there any standards of how fast a
> compressor that does about 10 scfa/m @90psi should take to fill a 25
> gal tank?
>

Sorry, I didn't see you specified the cfm and tank volume.

Time to fill should be approximately:

Volume * pressure in atm / volume rate, or

25 gal x 0.137 cu ft per gallon * 90 psi / 14.7 psi ambient / 10 cu ft per
minute = 2.1 minutes.

So it should take several minutes.

Posted by powerdoc on October 29, 2007, 8:23 am
Thanks! This is about what it's doing; First 240 v compressor I'd had
so I really expected it to be speedier. Good URL reference


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