Product Overview | Immersion Tube Burners
CONTROL AND OPERATION
6758 Dual-Fuel™ Burners fire immersion tubes reliably with distillate oil or gas. Flames are stable over a wide range of firing rates, and excess air can be used to increase effective turndown. The 6758-4 Burner has no mounting plate or tile; it bolts directly to a 6" pipe size immersion tube, which may be reduced to 4" pipe after 3 feet. The 6758-6 has a steel-jacketed cylindrical tile that is inserted into an 8" pipe size immersion tube--after 3 feet, this may be reduced to 6" pipe size.
For control, use standard cross-connected 7216 Air/Gas Ratio Regulators and 7052 Air/Oil Ratiotrols.
When operating on gas, use 6 osi atomizing air pressure (no more) to keep atomizer cool. Set high fire ratio with an 8697 Metering Orifice in gas line, or by analysis of flue products. 1807 Limiting Orifice Gas Valve must be piped close to the burner, using a close nipple if possible.
For quieter gas operation, 6758-4 should be biased lean below 2 osi main air, the 6758-6 below 4 osi.
See Figure 1 for details.
On oil, use at least 14 osi atomizing air. Set high fire ratio by starting rich and reducing oil until smoke disappears from tube exhaust. Oil solenoid valve and Sensitrol oil valve must be piped as close to the burner as possible .
MAIN AIR CAPACITY, scfh †
ATOMIZING AIR CAPACITY, scfh †
Burner
Main air pressure across the burner, osi
Atomizing air pressure, osi
6 318 520
14
designation
1
5
6
8
12
16
6758-4 6758-6
1450 3240 3550 4 100 5 000 5 800 3700 8300 9100 10 500 12 900 14 800
490 800
†Add main and atomizing air capacities to get total burner capacity. Multiply scfh by 100 to get Btu/hr.
Required pressure for gas operation. Minimum pressure for oil operation.
tank wall
8 holes for ½ " studs equally spaced on 10" BC straddling CL
8 holes for 3⁄8 " studs equally spaced on 7 ½ " BC straddling CL
6758-4
6758-6
4" pipe
6" pipe
6" pipe 3' min.
8" pipe
9"
3⁄8 "
3' min.
tank wall
Bulletin 6758 Page 2
Figure 1. Suggested mounting of 6758 Burners to immersion tubes.
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