Sizing 3065 Aspirator Mixers - Table 3B
Table 3B. 3065 Mixer Throat Areas & Capacities, scfh air @ 1" and 30" wc Differential Pressure (Pressure Drop Across Mixer = Air Pressure - Mixture Pressure) (for Btu/h, multiply by 100)
3065(S) Mixers
3065(S) Mixer
Air
Air
3065(S) Mixer
Air
Air
3065(S) Mixer
Air
Air
Mixer
Throat
Flow
Flow
Mixer
Throat
Flow
Flow
Mixer
Throat
Flow
Flow
Size
Area in 2
@1"wc @30"wc
Size
Area in 2
@1"wc @30"wc
Size
Area in 2
@1"wc @30"wc
-7-0 -7-4
2.405 2.393 2.329 2.295 2.255 2.233 2.209 2.157 2.098 1.963 1.887 1.804 1.715 1.620 1.519 1.411 1.298 3.760 3.748 3.683 3.650 3.610 3.587 3.564 3.511 3.453
5 949 5 919 5 760 5 676 5 577 5 522 5 464 5 335 5 190 4 857 4 667 4 462 4 213 3 953 3 681 3 444 3 188
32 600 32 400 31 500 31 100 30 500 30 200 29 900 29 200 28 400 26 600 25 600 24 400 23 100 21 700 20 200 18 900 17 500 56 100 55 900 54 900 54 400 53 800 53 500 52 800 51 700 50 500
-7-S24 -7-S26 -7-S28 -7-S30 -7-S32 -7-S34 -7-S36 -7-S38
3.318 3.241 3.159 3.070 2.975 2.873 2.766 2.652 5.940 5.767 5.743 5.633 5.498 5.338 5.154 4.946 4.712 4.455 4.172 3.866 3.534 3.178 2.798 2.393 1.963
8 813 8 556 8 285 8 000 7 703 7 393 7 071 6 737
48 300 46 900 45 400 43 800 42 200 40 500 38 700 36 900 84 200 82 300 82 500 81 400 80 000 77 700 75 000 72 400 69 000 65 200 61 100 56 600 51 700 45 700 39 900 34 200 28 000
-8-S0 -8-S15 -8-S16 -8-S20 -8-S24 -8-S28 -8-S32 -8-S36 -8-S40 -8-S44 -8-S48 -8-S52 -8-S56 -8-S60 -8-S64 -8-S68 -8-S72
8.621 8.448 8.424 8.314 8.179 8.019 7.835 7.626 7.393 7.136 6.853 6.547 6.215 5.859 5.479 5.074 4.644
23 325 127 800 22 718 124 000 22 514 123 300 22 081 120 900 21 587 118 200 21 033 115 200 20 420 111 800 19 750 108 200 19 146 104 900 18 478 101 200
-7-10 -7-12 -7-14 -7-15 -7-16 -7-18 -7-20 -7-24 -7-26 -7-28 -7-30 -7-32 -7-34 -7-36 -7-38
-8-0 -8-15 -8-16 -8-20 -8-24 -8-28 -8-32 -8-36 -8-40 -8-44 -8-48 -8-52 -8-56 -8-60 -8-64 -8-68 -8-72
15 381 15 030 15 063 14 867 14 602 14 178 13 689 13 217 12 594 11 906 11 151 10 331
17 747 16 844 16 095 15 271 14 461 13 224 12 027
97 200 92 300 88 200 83 600 79 200 72 400 65 900
-7-S0 -7-S4 -7-S10 -7-S12 -7-S14 -7-S15 -7-S16 -7-S18 -7-S20
10 236 10 203 10 027 9 935
-9-0 -9-24 -9-32 -9-40 -9-48 -9-56 -9-64 -9-72 -9-80
10.682 10.241 9.897 9.455
31 033 170 000 29 239 160 000 27 765 152 000 26 526 145 000 25 011 137 000 23 221 127 000 21 155 116 000
9 446 8 336 7 292 6 237 5 117
9 827 9 766 9 642 9 443 9 229
8.915 8.277 7.541 6.706 5.774
17 812 14 856
98 000 81 000
SIZING EXAMPLES
Example B: Select a mixer for feeding six (6) 4651-2-A burners, with zero governor ratio control for natural gas.
Note: Most premix burner pressure specifications are rated in inches water column. Most North American, blower and mixer air pressure specifications, are rated in osi: 1 osi = 1.73"w.c. Example A: Select a mixer for a single 4651-2-D burner with 16 osi (27.7"w.c.) air and 8"wc mixture pressure, with zero governor ratio control for natural gas. — Since this is a standard burner nozzle size with zero governor ratio control, use Table 1 . Find the -2-D burner and pick a 3065- 2-0 mixer from the list to the left. Per Table 3A , the 3065-3-13 has the same mixer throat area, and offers more sizing options if field conditions require a new displacement rod choice.
— Since these are standard size burner nozzles with zero governor ratio control, use Table 2 . Find the -2-A burner row move right and find the 6 burner column. Pick the 3065-6-20 Mixer from the list.
Bulletin 3065 page 13
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