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12.16 - Leakage Loss in Compressed Air Systems

The following table shows the volume of air (at 7 bar) lost through holes of various diameters, together with the resultant approximate power required to maintain such leakage. The figures are based on a flow of coefficient of 0.65 for non circular shapes.

Equivalent hole diameterAir leakage at 7 barPower required by the compressor
mmL/skW
0.50.20.06
1.00.80.24
1.51.80.54
2.03.10.93
6.028.28.5
1078.123.4