Combustion Catalog | Fives North American

Capacities | Metering Orifice

8694A FLANGED ORIFICE METER CAPACITY TABLE (SCFH)

Pressure drop across orifice plate ("w.c.)

Pipe size Plate No.

1

2

3

4

5

6

7

8

9

10

270 324 387 468 558 675 810 915 468 558 675 810

147 176 211

210 250 300 360 430 520 620 700 360 430 520 620 750 890 1080 1460 520 620 750 890 1080 1290 1540

250 300 370 440 530 640 760 860 440 530 640 760 920 1090 1320 1780

290 350 420 510 610 740

330 390 470 570 680 820 990 1110 570 680 820 990 1180 1410 1710

360 430 520 620

390 470 560 670 800 970 1170 1320

420 500 600 720 860 1040 1250 1410

440 530 630 770 910 1100 1320 1490

460 560 670 810 960 1160 1390 1570 810 960 1160 1390 1670 2000 2410 3250 1160 1390 1670 2000 2410 2880 3440 5120

1"

255 304 368 441 498

740 900 1080 1220

880 1000

255 304 368 441 529 632 763 1029 368 441 529 632 763 910 1089 1618

510 610 740 880

620 740

670 800 970 1170

720 860 1040 1250 1500 1790 2160 2910 1040 1250 1500 1790 2160 2570 3080 4580

770 910

900 1080 1300 1550 1870 2520 900 1080 1300 1550 1870 2230 2670 3960

1100 1320 1590 1900 2290 3090 1100 1320 1590 1900 2290 2730 3270 4850

1-1/4"

972 1160 1400 1890 675 810 972 1160 1400 1670 2000 2970

1060 1260 1530 2060 740 880 1060 1260 1530 1820 2180 3240

1400 1670 2020 2720

2300

640 760 920

820 990 1180 1410 1710

970 1170

1400 1670 2020 2410 2880 4280

1090 1320 1580 1890

1-1/2"

2030 2440 3620

2290 2800

Bulletin 8694A Page 5

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