Sizing 3065 Aspirator Mixers - Table 1
Table 1 is used to size a single 3065 for any North American 4651, 4659, or 4682 premix burner , which all share the same capacity rating system. Mixer/burner recommendations in Table 1 maintain the required relationship between the mixer orifice size and burner port size for use with zero governor ratio control. To use this table, find burner size in the third column from the left, then read across to the mixer designation that appears to the left that matches the fuel being used.
Aspirator Mixer for ¾ " Premix Pilot Tips: The premix capacity of ¾ " 4021 and 4027 premix pilot tips is similar to the 4651-01-A burner. So use the -01-A data in Table 1 for ¾ " pilot mixer sizing. Consult the pilot bulletin for acutal pilot capacities. The 4031 pilot mixer is often preferred for use with a single ¾ " pilot tip. For better pilot tip reliability, pilot ratio regulators should be cross-connected downstream of the pilot air control valve to a pilot mixture or air pressure tap.
TABLE 1. Capacities* scfh air of 3065 Mixers with North American burner nozzles. (for Btu/h, multiply by 100)‡
Required Air Pressure in osi for Natural Gas
North
2
4
6
8
10
12
14
16
Complete 3065 Mixer Designation
4.6 Required Air Pressure in osi ^ for Manufactured or Coke Oven Gas Mixture Pressure in inches of Water Column** 6.8 9.1 11.4 13.7 16
American Premix Burner
2.3
18.3
Manufactured or Coke Oven Gas
Natural
Gas
Size # -01-A
1
2
3
4
5
6
7
8
3065-0-10 3065-0-9 3065-0-8 3065-0-7 3065-1-9 3065-1-8 3065-2-13 3065-2-12 3065-2-10 3065-2-6 3065-3-14 3065-3-11 3065-4-18 3065-4-14 3065-4-12 3065-5-18 3065-5-13 3065-6-24 3065-6-18 3065-6-16 3065-7-38 3065-7-32 3065-7-26 3065-8-68 3065-8-60 3065-8-52 3065-8-28 3065-9-64
3065-0-9 3065-0-8 3065-0-6 3065-0-5 3065-1-7 3065-1-5 3065-2-12 3065-2-10 3065-2-6 3065-2-0 3065-3-11 3065-3-6 3065-4-16 3065-4-10 3065-4-8 3065-5-14 3065-5-10 3065-6-20 3065-6-10 3065-6-0 3065-7-34 3065-7-26 3065-7-18 3065-8-64 3065-8-56 3065-8-36 3065-8-0 3065-9-56
130 200 250 280 350 440 560 650 780 880
180 280 350 400 490 620 790 920
230 350 430 480 610 760
260 400 500 560 700 880
290 450 560 630 780 980
320 490 610 690 860
340 530 660 740 930
370 570 710 790 990
-0-A -0-B -0-C -1-A -1-B -2-A -2-B -2-C -2-D -3-A -3-B -4-A -4-B -4-C -5-A -5-B -6-A -6-B -6-C -7-A -7-B -7-C -8-A -8-B -8-C -8-D
1 080 1 370 1 590 1 910 2 160 2 400 2 940 3 670 4 650 5 020 6 000 7 100 7 800 9 400 10 400 11 600 14 700 17 300 25 700 31 800 44 100 52 500 92 000
1 160 1 480 1 720 2 060 2 330 2 590 3 170 3 970 5 030 5 420
1 240 1 580 1 840 2 210 2 490 2 770 3 390 4 240 5 370 5 800
970 1 130 1 350 1 520 1 700 2 080 2 600 3 290 3 550 4 240 5 000 5 500 6 700 7 400 8 200
1 120 1 300 1 560 1 760 1 960 2 400 3 000 3 800 4 100 4 900 5 800 6 400 7 700 8 500
1 250 1 450 1 740 1 970 2 190 2 680 3 350 4 250 4 580 5 480 6 500 7 200 8 600 9 500
1 100 1 240 1 390 1 700 2 120 2 690 2 900 3 460 4 100 4 500 5 400 6 000 6 700
980 1 200 1 500 1 900 2 050 2 450 2 900 3 200 3 850 4 250 4 750 6 000 7 050
6 480 7 700 8 500 10 200 11 200 12 600 15 900 18 700 27 800 34 400 47 600 57 000
6 930 8 200 9 100 10 900 12 000 13 400 17 000 19 900 29 700 36 800 51 000 60 800
9 500 12 000 14 100 21 000 26 000 36 000 43 000 75 500
10 600 13 400 15 800 23 500 29 100 40 200 48 100 84 500
8 500 10 400 10 000 12 200 14 800 18 200 18 400 22 500 25 500 31 200 30 400 37 200 53 500 65 000
10 500 13 000 18 000 21 500 37 700
-9
99 500 107 000
‡ Capacities with 100% combustion air through mixer and nozzle. Burners can be operated with "rich" mixture if secondary air is available in vicinity of nozzle, which increases Btu/h capacities. NOTES: * Air flow capacity data assumes stoichiometric ratio with natural gas, air flow increases with excess air and decreases with excess fuel.
** Not every size premix burner capacity is available for every burner type, or stable at every pressure on this table. Consult the individual burner bulletin and sheets for details and operating stability range. ^Multiply air pressure in osi by 1.73 to convert pressure in osi to pressure in inches wc (16 osi = 27.7"w.c.) Bulletin 3065 page 8
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