unity. Table 1 gives the numerical values for 29.92/P. To find acfm, multiply the scfm by the value found in the table opposite the vacuum pressure (P). A direct ratio for converting scfm to acfm (sL/s to aL/s) for various pressures is given in table 2. Multiply the scfm (sL/s...
In specifying blower performance, major problems occur in distinguishing ACFM from SCFM, and in correctly converting from one to the other. Some people even use SCFM and ACFM interchangeably. SCFM is normally used to designate flow in terms of some base or reference pressure, temperature and rel...
We can easily derive the conversion equation from the ideal gas law and the mass flow rate equation above. The mass flow rate is equal whether the flow is stated in CFM or SCFM. m/t = ρactual*CFM = ρstd*SCFM → SCFM = CFM *(ρactual/ ρstd) = CFM * (ρactual/Pstd)*(Tstd/...
Inlet Cubic Feet per Minute - ICFM - is used by compressor vendors to establish conditions in front of additional equipment like inlet filter, blower or booster. When air passes through the filter there will be a pressure drop. The conversion from ACFM to ICFM can be expressed as ICFM =...
The conversion for ACFM from SCFM is shown by the formula below. ( ) std sat std T T P P P SCFM ACFM 1 1 1 1 ×× −× = φ Equation 1 Note, absolute units must be used in the equation. SCFM – ACFM EXAMPLE 1 – Normal Day For this example we will reference a 30-hp...
CFM (M3/min.) is often stated when someone may actually be looking for SCFM, which is Standard Cubic Feet per Minute. This can also be a confusing unit, as the unit revolves around a reference point in order to be able to adapt it to your point of use conditions. We use a “Standa...