OM-4409 Page 67
SECTION 15 − AIR COMPRESSOR TABLES
15-1. Flow Of Free Air (CFM) Through Orifices Of Various Diameters
Gauge Pressure (psi)
Orifice Diameter (in) And Free Air Flow (CFM)
1/64 1/32 3/64 1/16 3/32 1/8 3/16 1/4
1 0.027 0.107 0.242 0.430 0.97 1.72 3.86 6.85
2 0.038 0.153 0.342 0.607 1.36 2.43 5.42 9.74
3 0.046 0.188 0.471 0.750 1.68 2.98 6.71 11.9
5 0.059 0.242 0.545 0.965 2.18 3.86 8.71 15.4
10 0.084 0.342 0.77 1.36 3.08 5.45 12.3 21.8
15 0.103 0.418 0.94 1.67 3.75 6.65 15.0 26.7
20 0.119 0.485 1.07 1.93 4.25 7.7 17.1 30.8
25 0.133 0.54 1.21 2.16 4.75 8.6 19.4 34.5
30 0.156 0.632 1.40 2.52 5.6 10.0 22.5 40.0
35 0.173 0.71 1.56 2.80 6.2 11.2 25.0 44.7
40 0.19 0.77 1.71 3.07 6.8 12.3 27.3 49.1
45 0.208 0.843 1.9 3.36 7.6 13.4 30.3 53.8
50 0.225 9.14 2.05 3.64 8.2 14.5 32.8 58.2
60 0.26 1.05 2.35 4.2 9.4 16.8 37.5 67.0
70 0.295 1.19 2.68 4.76 10.7 19.0 43.0 76.0
80 0.33 1.33 2.97 5.32 11.9 21.2 47.5 85.0
90 0.364 1.47 3.28 5.87 13.1 23.5 52.5 94.0
100 0.40 1.61 3.66 6.45 14.5 25.8 58.3 103.0
110 0.43 1.76 3.95 7.00 15.7 28.0 63.0 112.0
120 0.47 1.90 4.27 7.58 17.0 30.2 68.0 121.0
130 0.50 2.04 4.57 8.13 18.2 32.4 73.0 130.0
140 0.54 2.17 4.87 8.68 19.5 34.5 78.0 138.0
150 0.57 2.33 5.2 9.20 20.7 36.7 83.0 147.0
175 0.66 2.65 5.94 10.6 23.8 42.1 95.0 169.0
200 0.76 3.07 6.90 12.2 27.5 48.7 110.0 195.0
