Orifice Air Discharge vs. Pressure

Nozzles discharging air volume. Calculate air leakage or air volume passing through orifices ranging from 1/64 to 1/4 inches. For well rounded nozzles multiply the diagram values by 0.97. For sharp edged nozzles multiply the values by 0.65.

Conversion Factors

  • 1 psig = 6.9 kPa = 0.069 bar
  • 1 inch = 25.4 mm
  • 1 scfm = 0.472 nl/s

Nozzle Types

  • Well rounded nozzles: Multiply diagram values by 0.97
  • Sharp edged nozzles: Multiply diagram values by 0.65
Calculator

Inputs

Results

Pressure-- kPa
Pressure-- bar
Orifice Size-- mm