5707070-A Specifications and Reference Information 4-13
Sono-Trak™ Doppler Ultrasonic Flow Meter
Table 4-9. Velocity conversion table (FPS to GPM)
Nominal pipe
size (inches)
Velocity in Feet Per Second (fps)
Schedule 40
1/2 fps 1 fps 2 fps 3 fps 4 fps 5 fps 6 fps 8 fps 10 fps 15 fps 20 fps
GPM GPM GPM GPM GPM GPM GPM GPM GPM GPM GPM
1 1.32.75.48 11 13 1622274054
1.5 3.26.51319 25 32 38516495127
2 5.2 10.5 21 31 42 52 63 84 105 157 209
2.5 7.5 15 30 45 60 75 90 119 149 224 299
3 11.5 23 46 69 92 115 138 184 231 346 461
4 20 40 80 119 159 199 238 318 397 596 794
5 31 62 125 187 250 312 374 499 624 936 1248
6 45 90 180 270 360 451 541 721 901 1352 1802
8 78 156 312 468 624 780 936 1248 1561 2341 3121
10 123 246 492 738 984 1230 1476 1968 2460 3690 4920
12 175 349 698 1047 1397 1746 2095 2793 3492 5237 6983
14 211 422 844 1266 1688 2110 2532 3376 4220 6330 8440
16 276 551 1103 1654 2205 2756 3308 4410 5513 8269 11025
18 349 698 1396 2093 2791 3489 4187 5582 6978 10466 13955
20 434 867 1734 2602 3469 4336 5203 6938 8672 13008 17344
24 627 1254 2508 3763 5017 6271 7525 10034 12542 18814 25085
30 1048 2096 4192 6288 8385 10481 12577 16769 20961 31442 41923
36 1522 3044 6089 9133 12177 15221 18266 24354 30443 45664 60886
42 2084 4169 8338 12506 16675 20844 25013 33351 41688 62532 83377
48 2735 5470 10940 16409 21879 27349 32819 43758 54698 82047 109396
54 3441 6882 13764 20646 27528 34410 41292 55056 68821 103231 137641
60 4192 8395 16769 25154 33538 41923 50307 67076 83845 125768 167690
