Aspirator Air/Gas Mixers - Fives North American Combustion, Inc. - (Version JPG) - PDF Catalogue | Technical Documentation

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Controller, Gas analyzer, Burner, Shut-off valve, Radiant tube burner

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Ol North American

Manufacturing Company

ASPIRATOR AIR/GAS MIXERS

Bulletin 3065

October 1991

3065 Aspirator Mixers use the energy of blower air passing through a venturi to entrain a proportional flow of gas at atmospheric (zero gauge) pressure. Btu input to nozzles fed by the 3065 thus can be controlled by a single manual or motorized air valve.

Proper air/gas ratio, set by adjusting the integral V-portt valve in the mixer, is maintained from high fire to low by an "atmospheric regulator" or "zero governor" (e.g., North American's 7218).

A definite relationship should be maintained between mixer orifice size and burner port size. Within limits, the mixer orifice size can be altered by exchanging displacement rods. Several rods are available for each size mixer--see Instructions and Parts List 3065. Rod diameter, in 32nds of an inch, is stamped on the rod nut.

For coke oven, manufactured, and other gases corrosive to brass, specify 3065- -K Mixer with all iron parts.

Figure 1. Typical arrangement of 3065 Aspirator Mixer with burner, atmospheric regulator, and air valve.

TABLE 1. Capacities of 3065 Mixers with North American nozzles.

scfh air (for Btu/hr, multiply by 100)$

Required Air Pressure in osi for Natural Gas


Complete		North	2	1 4	⁶	⁸	10	12	14	16
Mixer Designation		American		Required Air Pressure in osi for Manufactured or Coke Oven Gas
		Premix	2.3	I 5.7	I 6.8	9.1	11.4	13.7 1	16.00 1	18.3
Manufactured or	Natural	Burner			Mixture Pressure in inches of Water Column
Coke Oven Gas	Gas	Size	1	\| ^2.5	³	⁴	5	⁶	⁷	8
_	_	-01	130	210	220	260	290	320	340	360
3065-0-8	3065-0-7	-0-A	200	320	340	390	440	480	520	550
3065-0-7	3065-0-5	-0-B	250	400	430	500	560	610	660	710
3065-0-5	3065-0-0	-0-C	280	450	490	570	640	700	750	810
3065-1-11	3065-1-9	-1-A	350	560	600	700	790	860	920	990
3065-1-9	3065-1-6	-1-B	440	700	760	880	990	1 070	1 160	1 240
3065-2-13	3065-2-12	-2-A	560	880	960	1 120	1 260	1 370	1 480	1 580
3065-2-12	3065-2-10	-2-B	650	1 030	1 120	1 300	1 460	1 590	1 720	1 840
3065-1-20	3065-2-6	-2-C	780	1 230	1 340	1 560	1 750	1 910	2 060	2 190
3065-2-6	3065-2-0	-2-D	880	1 390	1 510	1 760	1 980	2 150	2 320	2 480
3065-3-14	3065-3-11	-3-A	980	1 550	1 690	1 960	2 200	2 390	2 590	2 760
3065-3-11	3065-3-6	-3-B	1 200	1 900	2 060	2 400	2 690	2 930	3 170	3 380
3065-4-18	3065-4-16	-4-A	1 500	2 380	2 580	3 000	3 360	3 660	3 960	4 240
3065-4-14	3065-4-10	-4-B	1 900	3 010	3 280	3 800	4 270	4 650	5 000	5 350
3065-4-12	3065-4-8	-4-C	2 050	3 240	3 530	4 100	4 610	5 000	5 400	5 800
3065-5-18	3065-5-14	-5-A	2 450	3 880	4 220	4 900	5 500	5 990	6 500	6 900
3065-5-13	3065-5-10	-5-B	2 900	4 600	5 000	5 800	6 500	7 100	7 650	8 200
3065-6-24	3065-6-20	-6-A	3 200	5 050	5 500	6 400	7 200	7 800	8 450	9 000
3065-6-18	3065-6-10	-6-B	3 850	6 100	6 600	7 700	8 650	9 400	10 200	10 800
3065-6-16	3065-6-0	-6-C	4 250	6 700	7 300	8 500	9 550	10 300	11 200	12 000
3065-7-38	3065-7-34	-7-A	4 750	7 500	8 500	9 500	10 600	11 600	12 600	13 400
3065-7-32	3065-7-26	-7-B	6 000	9 500	10 300	12 000	13 400	14 700	15 800	16 900
3065-7-26	3065-7-18	-7-C	7 050	11 100	12 100	14 100	15 800	17 200	18 600	19 800
3065-8-68	3065-8-64	-8-A	10 500	16 600	18 100	21 000	23 600	25 600	27 000	29 600
3065-8-60	3065-8-56	-8-B	13 000	20 600	22 400	26 000	29 300	31 800	34 400	36 800
3065-8-52	3065-8-36	-8-C	18 000	28 400	31 100	36 000	40 500	44 000	47 500	51 000
3065-8-28	3065-8-0	-8-D	21 500	34 000	37 000	43 000	48 400	52 500	56 500	60 500
3065-9-64	3065-9-56	-9	37 000	58 500	64 000	74 000	82 500	90 000	98 000	104 000

| 3065-9 Mixers have separate 1122-7-F Limiting Orifice Butterfly Valve for installation in the gas line upstream of the mixer. j 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/hr capacities.

Aspirator Air/Gas Mixers - Fives North American Combustion, Inc. - #1

Controller, Gas analyzer, Burner, Shut-off valve, Radiant tube burner