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

270 324 387 468 558 675 810 915 675 810 972 1160

147 176 211

210 250 300 360 430 520 620

250 300 370 440 530 640 760 860 640 760 920 1090 1320 1580 1890

290 350 420 510 610 740

330 390 470 570 680 820 990 1110 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 1040 1250 1500 1790 2160 2570 3080 4580

440 530 630 770 910 1100 1320 1490

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

1"

255 304 368 441 498

740 900 1080 1220 900 1080 1300 1550 1870 2230 2670 3960

880 1000

70 0

368 441 529 632 763 910

520 620 750 890 1080 1290 1540

740 880 1060 1260 1530 1820 2180 3240

970 1170

1100 1320 1590 1900 2290 2730 3270 4850

1400 1670 2020 2410 2880 4280

1-1/2"

1400 1670 2000 2970

2030 2440 3620

1089 1618

2290 2800

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

Pipe size Plate No.

11

12

13

14

15

16

17

8

9

20

9

270 324 387 468 558 675 810 915 675 810 972 1160

850 1010 1220 1460 1750 2100 2530 3410

880 1050 1270 1530 1830 2190 2640 3560

920 1100 1330 1590 1910 2280 2750 3710

950 1140 1380 1650 1980 2360 2850 3850

990 1180 1430 1710 2050 2450 2960 3990

1020 1220 1470 1760 2120 2530 3050 4120

1050 1250 1520 1820 2180 2610 3150 4240

1080 1290 1530 1870 2240 2680 3240 4370 1560 1870 2240 2680 3240 3860 4620 6860

1110

1140 1360 1650 1970 2370 2830 3410 4600 1650 1970 2370 2830 3410 4070 4870 7240

1330 1600 1920 2310 2750 3330 4490 1600 1920 2310 2750 3330 3970 4750 7050

1"

1220 1460 1750 2100 2530 3020 3610 5370

1270 1530 1830 2190 2640 3150 3770 5600

1330 1590 1910 2280 2750 3280 3930 5830

1380 1650 1980 2360 2850 3400 4070 6050

1430 1710 2050 2450 2960 3520 4220 6270

1470 1760 2120 2530 3050 3640 4360 6470

1520 1820 2180 2610 3150 3750 4490 6670

1-1/2"

1400 1670 2000 2970

Bulletin 8694A Page 5

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