TABLE 2. Recommended Mixer Selections for Multiple Burners Using Natural Gas
Size
desig.
1
2
3
4
5
6
7
8
9
10
-
01
-A
3065-0-9 3065-0-5 3065-1-6 3065-2-13 3065-2-11 3065-2-8
3065-2-6
3065-2-0
3065-3-11
3065-3-6
-0-A
3065-0-8 3065-1-8
3065-1-5 3065-2-8 3065-3-13 3065-3-9
3065-3-5 3065-4-16 3065-4-14
3065-4-12
-0-B
3065-0-6 3065-1-4 3065-2-8 3065-3-12 3065-3-7 3065-4-16
3065-4-14 3065-4-10 3065-5-18
3065-5-16
-0-C
3065-0-5 3065-2-12 3065-3-13 3065-3-6 3065-4-15 3065-4-11
3065-5-18 3065-5-15 3065-5-10
3065-6-24
-1-A
3065-1-7 3065-2-9 3065-3-10 3065-4-17 3065-4-13 3065-4-5
3065-5-15 3065-5-10 3065-6-22
3065-6-20
-1-B
3065-1-5 3065-2-4 3065-3-4 3065-4-13 3065-5-18 3065-5-13
3065-6-24 3065-6-20 3065-6-15
3065-6-10
-2-A
3065-2-12 3065-3-9 3065-4-14 3065-5-17 3065-5-9 3065-6-20
3065-6-15 3065-6-6 3065-7-36
3065-7-34
-2-B
3065-2-10 3065-4-18 3065-4-8
3065-5-12 3065-6-22 3065-6-14 3065-7-38 3065-7-34 3065-7-32 3065-7-28
-2-C
3065-2-6
3065-4-15 3065-5-15 3065-6-24 3065-6-13 3065-7-36 3065-7-32 3065-7-28 3065-7-24 3065-7-18
-2-D
3065-2-0 3065-4-11 3065-5-9 3065-6-18 3065-7-38 3065-7-32
3065-7-28 3065-7-20 3065-7-12
–
-3-A
3065-3-11 3065-4-8
3065-6-24 3065-6-13 3065-7-36 3065-7-30 3065-7-24 3065-7-15
–
–
-3-B
3065-3-6
3065-5-15 3065-6-18 3065-7-36 3065-7-30 3065-7-20 3065-7-4
–
–
–
-4-A
3065-4-16 3065-6-22 3065-7-38 3065-7-28 3065-7-18
–
–
–
–
–
-4-B
3065-4-10
3065-6-14
3065-7-30
3065-7-16
– – –
–
–
–
-4-C
3065-4-8 3065-6-9 3065-7-28 3065-7-4
–
–
–
–
–
–
-5-A
3065-5-14
3065-7-34
3065-7-16
– – – –
–
–
–
Number of Burners per 3065 Aspirator Mixer
Burner
Table 2 lists proper selection if several burners are fed
from a single 3065 mixer.
Burner capacity and number of
premix burners (4651, 4659, or 4682) determine mixer selection.
Mixer/burner recommendations in Table 2 maintain the required
relationship between the mixer orifi ce size and burner port size
for use with zero governor ratio control. Flow distribution and
pressure drops should be considered carefully when designing
the mixture manifold.
To use this table, fi nd burner size in left -hand column, then read
across to the mixer designation that appears under the number
of burners to be fed.
For additional information on premix systems and premix
system design, see the following sheets:
—
Series 4651, 4659, and 4682 Burner Nozzles,
Sheet 4600-1
—
North American Air/Gas Ratio Regulators,
Bulletin 7218/7219A
—
Air/Gas Ratio Regulators, Instructions 7218-2
—
Premix Burners, Handbook Supplement 288
Multiple premix burner arrangements with mixers larger than the
three inch -7 size, burners above the -5-A size or with more than
10 burners are prone to fl ashback. When sizing mixers for mul-
tiple burners outside the range of Table 2, use a single mixer for
each burner or divide the burners among two or more mixers,
and select the mixers from Table 2.
—
Straight pipe run requirements, Handbook Supplement 14
—
Jiff y Sheet, Handbook Supplement 288
—
Piping Practice for Industrial Burner Systems,
Handbook Supplement 46
—
Prevent "Pooped" Pilots, Handbook Supplement 289
—
Practical Pointers (Industrial Burner Control Systems
)
Sizing 3065 Aspirator Air/Gas Mixers - Table 2
Aspirator Mixers for
¾
" Premix Pilot Tips:
The premix capacity of
¾
" 4021 and 4027 premix pilot tips is
similar to the 4651-01-A burner. To size a 3065 for multiple
¾
"
pilot tips use the -01-A data row in Table 2 for
¾
" pilot mixer
sizing. Consult the pilot bulletin for actual pilot capacities. The
4031 pilot mixer is oft en preferred for use with a single
¾
" pilot
tip. Pilot ratio regulators should always be cross-connected to the
mixture or air pressure taps on the mixer.
Bulletin 3065
page 9
