Air Compressor Cfm At Different Pressures

To calculate scfm the air is expanded to a standard condition to take into account the variables of pressure temperature and humidity.

Air compressor cfm at different pressures.

We discuss with an example and it might be clear. For measuring the pressure coming out of the compressor i use cfm. As you know cfm stands for cubic feet per minute which is the speed of the air that gets into the compressor. Almost all compressor manuals that have compressed air output information provide it at 90 psi and sometimes at 40 psi.

Scfm refers to standard cubic feet per minute of air and a standard cubic foot of air is at 68 deg. Cfm tank volume in cubic feet atm of pressure during cycle crank time in the minute. However i found some ways that you can follow to make your compressor a high cfm compressor. Well we ve got two simple methods on how to increase cfm on air compressor at two different extents.

F at sea level with a specific humidity level circumstances far removed from the condition of the air discharging from your compressor. Let s go and figure them out let s understand air compressor cfm first. Usually an air compressor is built with a specific cfm rating for a specific pressure like 2 6 cfm at 90 psi. 14 7 psia 0 psig 68 degrees fahrenheit at 36 percent relative humidity.

Knowing the air compressor output at 90 psi output is good since many air tools are rated on their air consumption at that pressure. Air compressor cfm calculation formula. Example an air compressor bears a sticker where they claim the air compressor has 4 horsepower hp tank capacity 30 gallons 14 cfm at 90 psi. We can calculate the cfm.

Calculating cfm output at various pressure levels for air compressors over the years i have received many requests for information about calculating cfm at different pressures.