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OM-478 Page 51
SECTION 11 – AIR COMPRESSOR TABLES
11-1. Flow Of Free Air (CFM) Through Orifices Of Various Diameters
Gauge Pressure In
Receiver (lb)
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