Fill An Air Tank

So, how long does it take for your compressor to fill your air tank?

I've been asked that question a few times on my Ask Page. Since there appears to be a good deal of interest, I've added a page to this site dealing with how long it takes to fill and air tank.

Don't forget, there's more How To's on this page.

Here we go. First, gather the following information:

• V = Tank size
• Final pressure (cut-out pressure)
• Initial pressure (cut-in pressure)
• 7.48 - conversion from gallons to CFM
• Atmospheric pressure = 14.7
• Compressor Pump Delivery in CFM

Then, you apply the information to the following formula:

Example:

My tank size = 100 gallons

Cut-out pressure = 160 PSI

Cut-in pressure = 80 PSI

Conversion = 7.48

Atmospheric pressure = 14.7

Compressor Pump capacity = 4 CFM

That gives us:

Therefore:

100 x 80 = 8,000

Divided by:

440 (7.48 x 14.7 x 4 rounded up)

= 18.2 minutes

Folks, you are welcome to use these calculations but I have to tell you that I'm not an engineer. While the information is sourced from a number of reputable locations I can't be sure of the accuracy, and therefore, you use it at your own risk. If you need to be sure, get an engineer to help you.