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What is the difference between SCFM & ACFM?

April 26, 2017acfm scfm

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What is the difference between SCFM & ACFM?

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SCFM stands for Standard Cubic Feet per Minute. SCFM is the air volume measured at “standard conditions” which refers to atmospheric pressure (760 m Hg), at sea level elevation and a temperature of 60 Deg F. ACFM stands for Actual Cubic Feet per Minute and represents air volume pumped at the pressure, elevation and temperature your particular system is operating at. Many vacuum pump performance curves shows ACFM to indicate the actual volume of process gas pumped at various inlet pressure to the pump.