|
Discharge of Air Through an Orifice
In cubic feet of free air per minute at standard atmospheric pressure of 14.7
lb. per sq. in. absolute and 70°F.
Table is based on 100% coefficient of flow.
|
Discharge of Air Through an Orifice
In cubic feet of free air per minute at standard atmospheric pressure of 14.7
lb. per sq. in. absolute and 70°F.
Table is based on 100% coefficient of flow.
| DIAMETER OF ORIFICE | |||||||||||
|
Gauge Pressure
Before Orifice in Pounds per sq. in. |
1/64"
|
1/32"
|
1/16"
|
1/8"
|
1/4"
|
3/8"
|
1/2"
|
5/8"
|
3/4"
|
7/8"
|
1"
|
|
Discharge in cubic feet of free air per minute |
|||||||||||
| 1 2 3 4 5 |
.028 .040 .048 .056 .062 |
.112 .158 .194 .223 .248 |
.450 .633 .775 .892 .993 |
1.80 2.53 3.10 3.56 3.97 |
7.18 10.10 12.40 14.30 15.90 |
16.20 22.80 27.80 32.10 35.70 |
28.70 40.50 49.50 57.00 63.50 |
45.00 63.30 77.50 89.20 99.30 |
64.70 91.20 111.00 128.00 143.00 |
88.10 124.00 152.00 175.00 195.00 |
115.00 162.00 198.00 228.00 254.00 |
| 6 7 9 12 15 |
.068 .073 .083 .095 .105 |
.272 .293 .331 .379 .420 |
1.09 1.17 1.32 1.52 1.68 |
4.34 4.68 5.30 6.07 6.72 |
17.40 18.70 21.20 24.30 26.90 |
39.10 42.20 47.70 54.60 60.50 |
109.00 117.00 132.00 152.00 168.00 |
156.00 168.00 191.00 218.00 242.00 |
213.00 230.00 260.00 297.00 329.00 |
213.00 230.00 260.00 297.00 329.00 |
278.00 300.00 339.00 388.00 430.00 |
| 20 25 30 35 40 |
.123 .140 .158 .176 .194 |
.491 .562 .633 .703 .774 |
1.96 2.25 2.53 2.81 3.10 |
7.86 8.98 10.10 11.30 12.40 |
31.40 35.90 40.50 45.00 49.60 |
70.70 80.90 91.10 101.00 112.00 |
126.00 144.00 162.00 180.00 198.00 |
196.00 225.00 253.00 281.00 310.00 |
283.00 323.00 365.00 405.00 446.00 |
385.00 |
503.00 575.00 648.00 720.00 793.00 |
|
45 |
.211 .229 .264 .300 .335 |
.845 .916 1.060 1.202 1.340 |
3.38 3.66 4.23 4.79 5.36 |
13.50 14.70 16.90 19.20 21.40 |
54.10 58.60 67.60 76.70 85.70 |
122.00 132.00 152.00 173.00 193.00 |
216.00 235.00 271.00 307.00 343.00 |
338.00 366.00 423.00 479.00 536.00 |
487.00 528.00 609.00 690.00 771.00 |
662.00 718.00 828.00 939.00 1050.00 |
865.00 938.00 1082.00 1227.00 1371.00 |
| 90 100 110 120 125 |
.370 .406 .441 .476 .494 |
1.48 1.62 1.76 1.91 1.98 |
5.92 6.49 7.05 7.62 7.90 |
23.70 26.00 28.20 30.50 31.60 |
94.80 104.00 113.00 122.00 126.00 |
213.00 234.00 254.00 274.00 284.00 |
379.00 415.00 452.00 488.00 506.00 |
592.00 649.00 705.00 762.00 790.00 |
853.00 934.00 1016.00 1097.00 1138.00 |
1161.00 1272.00 1383.00 1494.00 1549.00 |
1516.00 1661.00 1806.00 1951.00 2023.00 |
| 150 200 250 300 400 |
.582 .761 .935 .995 1.220 |
2.37 3.10 3.80 4.88 5.98 |
9.45 12.35 15.18 18.08 23.81 |
37.50 49.00 60.30 71.80 94.50 |
150.00 196.00 241.00 287.00 378.00 |
338.00 441.00 542.00 646.00 851.00 |
600.00 784.00 964.00 1148.00 1512.00 |
910.00 1225.00 1508.00 1795.00 2360.00 |
1315.00 1764.00 2169.00 2583.00 3402.00 |
1789.00 2401.00 2952.00 3515.00 4630.00 |
2338.00 3136.00 3856.00 4592.00 6048.00 |
| 500 750 1000 |
1.519 2.240 2.985 |
7.41 10.98 14.60 |
29.55 43.85 58.21 |
117.30 174.00 231.00 |
469.00 696.00 924.00 |
1055.00 1566.00 2079.00 |
1876.00 2784.00 3696.00 |
2930.00 |
4221.00 6264.00 8316.00 |
5745.00 8525.00 11318.00 |
7504.00 11136.00 14784.00 |