TABLE 2. Recommended Mixer Selections for Multiple Burners Using Natural Gas

  Size
 desig. 

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

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