Product Overview | 6570 HiVAM ™
APPLICATION HiVAMs™ are a natural for installations requiring a portable burner to heat large volumes of air. Their high excess air ratio capabilities and lightweight all- metal construction make them ideal for such applications as drying refractory-lined furnaces and vessels, for permanent or temporary mounting on rotary dryers and calciners, and for other jobs where a self-contained portable burner or air heater avoids need for expensive mounting, installation, sealing, etc. OPERATION HiVAM™ Burners must be operated with at least 50% excess air at all firing rates. Light oil operation requires a constant 20 osi atomizing air pressure supply at the burner. For widest stability limits on gas a constant air supply should still be introduced through the atomizing air connection: 14 osi air pressure for the 6570-9, and 10 osi air pressure for the 6570-12. Gas pressure requirements are 8 osi (or less) for natural gas (0.6 sp gr) at design capacity for either size of burner. Consult North American for use with fuels other than light oil or natural gas.
Main air and fuel can be modulated together using cross- connected fuel regulators; or fuel only control (with constant air) can be used for maximum thermal turndown. Main flame ignition is normally by a 4021-16 spark ignited pilot tip furnished as an integral part of the burner. Customer supplies a 4031 Pilot Mixer, regulator, and shutoff valves.
6570 Dual-Fuel™ Burners use the spark ignited pilot. Direct spark ignition is not available for the 6570.
See Bulletin 4570 for "gas only" version.
FLAME SUPERVISION 6570 Dual-Fuel™ HiVAM™ Burners use two UV detectors. One sights the pilot through the pilot mixture tube and the other sights the main flame, gas or oil. The pilot and pilot scanner must be interrupted after main flame is established.
HiVAM™ Burners are suitable for furnace temperatures up to 1900°F. They can be used with preheated air up to 500°F.
Bulletin 6570 Page 2
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