<Tr> <Td> Sm3 </Td> <Td> 1.01325 bar a </Td> <Td> 15oC </Td> <Td> 0.0422937 kmol </Td> </Tr> <Tr> <Td> SCF </Td> <Td> 14.696 psi a </Td> <Td> 68oF </Td> <Td> 0.002641 lbmol </Td> </Tr> <P> Actual cubic foot per minute (ACFM) is the volume of gas flowing anywhere in a system, independent of its temperature and pressure . If the system were moving a gas at exactly the "standard" condition, then ACFM would equal SCFM . Unfortunately, this usually is not the case as the most important change between these two definitions is the pressure . To move a gas, a positive pressure or a vacuum must be created . When positive pressure is applied to a standard cubic foot of gas, it is compressed . When a vacuum is applied to a standard cubic foot of gas, it expands . The volume of gas after it is pressurized or rarefied is referred to as its "actual" volume . </P> <P> SCF and ACF for an ideal gas are related in accordance with the combined gas law: </P>

Convert standard flow rate to actual flow rate