North American Ribbon Gas Burners 4640 Ribbon Gas Burners are well suited for all low temperature, low Btu input applications requiring a continuous even flame. They are successfully used in baking ovens, coffee, cereal and nut roasters and similar applications where the burner temperature does not exceed 800°F. They are able to operate with single pilots and flame rods. Two corrugated stainless steel strips riveted and welded into a slot in the pipe form a continuous double row of small triangular ports. Maximum capacity with 100% air through the burner is 2600 Btu/hr per inch of flame slot at about 0.1"w.c. mixture pressure. Flame length is ¼ ". The burners can be run rich at a capacity of 3500 Btu/h HHV per inch of flame slot with a flame length of about 3", provided the necessary secondary air is furnished around the burner. Turndown is about 2 to 1 but may vary with the particular installation.
length in inches to obtain the mixer capacity required. Actual burner capacity, however, can be increased by operating rich as described previously. Because mixture pressures are low, recommended blower pressures are 2 to 6 osi (8 osi maximum).
A pretzel baking oven, fired with North American Ribbon Burners and Aspirator Mixers. Twenty-four burners above and twenty-four below the muffle maintain oven heat within ten degrees F in each of three zones.
4640 Ribbon Burners are fed air-gas mixtures from 3065 Aspirator Mixers. To choose the correct mixer for a given burner length, multiply 2200 Btu/h HHV per inch by flame slot
A – NPT
Flame Slot Length
3"
3"
Minimum Flame Slot
Maximum Flame Slot
Btu/h HHV per inch (100% air-gas mixture at 0.1"wc.)
Weight
Burner
in lb
designation
A
Length
Length
per foot
.
4640-1 4640-2 4640-3 4640-4
1"
6"
14" 25" 36" 60"
2600 2600 2600 2600
2 ¼
1 ¼" 1 ½"
15" 26" 37"
3
3 ¾
2"
5
T o order, specify: (Burner designation number) Burner Complete with flame slot length of
inches.
Example: 4640-1 Burner Complete with Flame Slot Length of 12 inches WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
CONTACT fna.sales@fivesgroup.com T +1 800 626 3477 - F +1 216 373 4237
Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA www.fivesgroup.com
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