Eclipse Engineering Guide

CAPACITY, CFH @ 1″ W.C. PRESSURE DROP
AND COEFFICIENT OF DISCHARGE OF 1.0
Natural Propane/
Drill Dia. Gas Air Air Propane Butane
Size In. Area 0.60 Sp. Gr. 1.0 Sp. Gr. 1.29 Sp. Gr. 1.5 Sp. Gr. 2.0 Sp. Gr.
57 .043 .00145 3.12 2.42 2.13 1.97 1.71
56 .0465 .00170 3.66 2.84 2.5 2.32 2.01
3/64 .0469 .00173 3.73 2.89 2.54 2.36 2.04
55 .0520 .00210 4.52 3.50 3.08 2.86 2.48
54 .0550 .0023 4.95 3.84 3.38 3.13 2.71
53 .0595 .0028 6.03 4.67 4.11 3.81 3.30
1/16 .0625 .0031 6.68 5.17 4.55 4.22 3.66
52 .0635 .0032 6.89 5.34 4.7 4.36 3.77
51 .0670 .0035 7.54 5.84 5.14 4.77 4.13
50 .070 .0038 8.18 6.34 5.58 5.18 4.48
49 .073 .0042 9.04 7.01 6.17 5.72 4.95
48 .076 .0043 9.26 7.17 6.31 5.86 5.07
5/64 .0781 .0048 10.3 8.01 7.05 6.54 5.66
47 .0785 .0049 10.5 8.17 7.2 6.67 5.78
46 .081 .0051 11. 8.51 7.49 6.95 6.02
45 .082 .0053 11.4 8.84 7.78 7.22 6.25
44 .086 .0058 12.5 9.67 8.52 7.9 6.84
43 .089 .0062 13.4 10.3 9.11 8.44 7.31
42 .0935 .00687 14.8 11.4 10. 9.36 8.1
3/32 .0937 .0069 14.9 11.5 10.1 9.40 8.14
41 .096 .0072 15.5 12. 10.6 9.81 8.49
40 .098 .0075 16.2 12.5 11. 10.2 8.85
39 .0995 .0078 16.8 13. 11.5 10.6 9.2
38 .1015 .0081 17.4 13.5 11.9 11.0 9.55
37 .104 .0085 18.3 14.2 12.5 11.6 10.
36 .1065 .0090 19.4 15. 13.2 12.3 10.6
7/64 .1093 .0094 20.2 15.7 13.8 12.8 11.1
35 .110 .0095 20.5 15.8 14. 12.9 11.2
34 .111 .0097 20.9 16.2 14.2 13.2 11.4
33 .113 .0100 21.5 16.7 14.7 13.6 11.8
32 .116 .0106 22.8 17.7 15.6 14.4 12.5
31 .120 .0113 24.3 18.8 16.6 15.4 13.3
1/8 .125 .0123 26.4 20.4 18. 16.7 14.5
30 .1285 .0130 27.9 21.6 19. 17.6 15.3
29 .136 .0145 31.1 24.1 21.2 19.7 17.
28 .1405 .0155 33.3 25.8 22.7 21. 18.2
9/64 .1406 .0156 33.5 25.9 22.8 21.2 18.3
27 .144 .0163 35. 27.1 23.9 22.1 19.2
26 .147 .0174 37.3 28.9 25.5 23.6 20.4
25 .1495 .0175 37.5 29.1 25.6 23.7 20.6
24 .152 .0181 38.8 30.1 26.5 24.6 21.3
23 .154 .0186 39.9 30.9 27.2 25.2 21.9
5/32 .1562 .0192 41.2 31.9 28.1 26.1 22.6
22 .157 .0193 41.4 32.1 28.2 26.2 22.7
21 .159 .0198 42.5 32.9 29. 26.9 23.3
20 .161 .0203 43.6 33.7 29.7 27.5 23.9
19 .166 .0216 46.3 35.9 31.6 29.3 25.4
18 .1695 .0226 48.5 37.6 33.1 30.7 26.6
11/64 .1719 .0232 49.8 38.6 33.9 31.5 27.3
17 .175 .0235 50.4 39.1 34.4 31.9 27.6
16 .177 .0246 52.8 40.9 36. 33.4 28.9
15 .180 .0254 54.5 42.2 37.2 34.5 29.9
14 .182 .0260 55.8 43.2 38. 35.3 30.6
13 .185 .0269 57.7 44.7 39.4 36.5 31.6
3/16 .1875 .0276 59.2 45.9 40.4 37.5 32.4
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