SCFM (Standard CFM) is the flow in CFM measured at some reference point but converted back to standard air conditions (Standard Reference Atmosphere) 14.696 psia, 60 oF.ANR (Atmosphere Normale de Reference) is quantity of air at conditions 1.01325 bar absolute, 20 oC and 65% RH ( Relative Humidity).The units are in general measured according the ambient inlet standard conditions ISO 1217: Ambient temperature = 20 oC, Ambient pressure = 1 bar abs, Relative humidity = 0%, Cooling water/air = 20 oC and Effective working pressure at discharge valve = 7 bar abs. The units for FAD are CFM in the imperial system and l/min in the SI system.
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