Bulletin 7349A Page 3
Table B. 7349A Capacities
Natural Gas Capacities in SCFH (0.6 SG)
Inlet Pressure
Outlet Pressure Setting osi.
4
Size
(osi)
8
10
14
16
20
24
16 32 48 64 80 16 32 48 64 80 16 32 48 64 80 16 32 48 64 80 16 32 48 64 80 16 32 48 64 80 16 32 48 64 80 16 32 48 64 80 16 32 48 64 80
698 1066 1337 1561 1757 1323 2020 2533 2958 3329
570 987
494 945 1242 1481 1686
285 855 1175 1425 1637
806 1140 1396 1612 1527 2160 2645 3055 1980 2800 3429 3960 4893 6920 8475 9786
698 1066 1337 1561 1323 2020 2533 2958
570 987
7349A-01
1275 1508 1710 1080 1871 2415 2857 3240 1400 2425 3130 3704 4200
1275 1508
935 1791
540
1620 2226 2700 3102
1080 1871 2415 2857 1400 2425 3130 3704 3460 5993 7737 9154
7349A-0
2354 2806 3195
1715
1212
700
2619 3283 3834 4315 4238 6473
2322 3051 3637
2100 2886 3500 4021 1730 5190 7133 8650 9938 2800 8400 11545 14000 16085 4800 14400 19791 24000 27574 6900 20700 28449 34500 39637
1715
7349A-1
2619 3283 3834
4141
3460 5993 7737 9154 10380 5600 9699 12522 14816 16800 9600 16628 21466 25399 28800 13800 23902 30858 36511 41400 18200 31523 40696 48153 54600 35200 60968 78710 93130 105600
2996 5738
4238 6473
7349A-2
8114
7541
9476 10664 6859 10477 13133 15336 17260 11758 17960 22514 26291 29589 16901 25817 32364 37793 42534 22290 34049 42683 49843 56096
8989 10235 4850 9287 12205 14549 16565
8114
9476
7920 11200 13717 15839 13576 19200 23515 27153 19516 27600 33803 39032 25739 36400 44581 51477 49780 70400 86222 99561
6859 10477 13133 15336 11758 17960 22514 26291 16901 25817 32364 37793 22290 34049 42683 49843
5600 9699 12522 14816 9600 16628 21466 25399 13800 23902 30858
7349A-3
8314
15920 20923 24942 28397
7349A-4
11951
22885 30076 35853 40821 15762 30181 39666 47285 53836 30484 58373 76717 91452 104123
7349A-5
36511
9100
27300 37520 45500 52276 17600 52800 72567 88000 101104
18200 31523 40696 48153 35200 60968 78710 93130
7349A-6
43111
65853 82551 96399 108494
43111
7349A-7
65853 82551 96399
SELECTION Capacities for 7349A and 7349A- -S models are identical, and both hold outlet pressures with the same degree of accuracy. Use the 7349A- -S to maintain downstream gas pressure at a point remote from the regulator itself. Select 7349A- -V for high ambient temperature applications. When selecting a regulator for other than natural gas, divide required flow by the appropriate gas gravity factor (Table C) and use the resulting equivalent flow to size the regulator from Figure 3. TABLE C. Regulator capacity correction factors for different gas gravities. Gas (typical) Coke oven Natural Air Propane Butane Gas Gravity 0.4 0.6 1.0 1.5 2.0 Factor 1.22 1.00 0.774 0.632 0.547
Sizing Example: Select a regulator for 39,000 scfh of Coke Oven Gas with 50 osi inlet pressure and an outlet pressure of 18 osi.
Solution: Correct 39,000 scfh of coke oven gas to the natural gas equivalent by dividing 39,000 scfh by the correction factor of 1.22 found in Table C. (39,000 ÷ 1.22 = 31,967 scfh natural gas equivalence). Using table B, select the desired outlet pressure column, or next highest available. 18 osi is unavailable, therefore use the 20 osi column. Select desired inlet pressure, or next lowest available, from the inlet pressure column. 50 osi is unavailable therefore use the 48 osi row. Follow the 48 osi inlet pressure row until it intersects with the 20 osi outlet column to determine maximum gas flow of each size regulator. Select the small- est regulator that will flow 31,967 scfh natural gas or more. Select the 7349A-6 which will pass 34,049 scfh natural gas with 48 osi inlet pres- sure and 20 osi outlet pressure. From table A, select the red spring “R” to provide an outlet pressure of 18 osi. Specify a 7349A-6-R.
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