The flow rate measurement for vacuum is exactly the opposite of that for compressed air. Using ambient, standard free air at atmospheric pressure (referred to as standard cubic feet per minute [scfm] as a common reference, the ambient free air entering the vacuum pipe will expand to fill the...
SCFM to ACFM Calculator SCFM Actual Temperature Actual Pressure Barometric Pressure Relative Humidity ACFM AUTHOR Jim Hene Founder and president of pdblowers, Jim brings a lifetime of mechanical equipment expertise, driving innovation and leading the company to deliver unparalleled industrial solutions and...
The calculator below can used to calculate ACFM: SCFM Standard absolute air pressure - Pstd - (psia) Actual absolute air pressure - Pact - (psia) Saturation pressure at the actual temperature - Psat - (psia) Actual relative humidity - Φ Actual ambient air temperature - Tact - ( ...
actual temperature). The distinction between SCFM and CFM is important because air density will change with pressure and temperature. This can be seen from taking a look at the ideal gas law. As you may remember, density = mass/volume. When the ideal gas ...