OM-478 Page 51
SECTION 11 – AIR COMPRESSOR T ABLES

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