What is the formula for free air delivery?

Answer 1

Air, partially low pressures as 1 to 10 bars, can be accepted as an ideal gas. That means, assuming in constant temperature, the formulae P1(bar,absolute)*Q1(litres/min)=P2(bar,absolute)*Q2(litres/min)

can be used.

P1(bar,absolute)=1 atm quite equall to 1 bar,abs (known)

P2(bar,absolute)=any given in bars,absolute at which the air flow in litres per minute we'd like to calculate(known)

Q1(litres/min)=F.A.D.(written down on label of the compressor)

Q2(litres/min)=(unknown)the amount of air flow at pressure, P2 in bars,abs