Originally Posted by jorb
When using a Portable Air Tank like THESE
How long does a full tank of air last?
An example would be:
The Portable Air Tank can handle a maximum 135 PSI of pressure.
You start out with 135 PSI of pressure in the tank.
A tire has 10 PSI in it, and you want to fill that tire to 30 PSI.
After you add 20 PSI into the tire, how much air or air pressure is left in the Portable Air Tank?

Are you gaining anything between using a 5 gallon or a 10 gallon Tank?
They both can handle the same maximum 135 PSI of pressure.
That kind of question can give even engineers a headache. frown There are really too many variables to give a definite answer. Compressed air is weird stuff (because air is compressible). How much volume is in the tires? What's the initial pressure in them? If they're flat, what's the difference in volume between flat and round? etc. etc. ...

Here's some info that I dug up on the web that may help you figure it out. click

It may just be easier to get the biggest tank and try it to see what it will do. If it doesn't work like you expect, trade in the tank for a bigger one. ohwell

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
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