Product Overview | 4570 HiVAM™
APPLICATION
TABLE 1. Main Air Capacities--scfh Burning with 50% excess air, which is the rich limit. Therefore, for maximum Btu/hr, divide by 1.5 and multiply by 100. Burner
HiVAMs are a natural for installations requiring a portable burner to heat large volumes of air.
Main air pressure drop across burner in osi
16 †
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. For widest stability limits on gas a constant air supply should still be introduced through the atomizing air connection: 14 osi air pressure is required for the 4570-9 and 8 osi air pressure for the 4570-12.
designation
0.2
1
4
9
4570-9 4570-12
9 000 13 500 39 300 59 000 80 000 20 100 45 500 81 500 122 000 170 000
† 16 osi air is the maximum firing rate.
TABLE 2. Capacities in scfh not burning (for sizing blowers) Burner Main Air Atomizing designation at 16 osi Air 4570-9 96 000 5600 at 14 osi 4570-12 186 000 4600 at 8 osi TABLE 3. Maximum Excess Air Percentages (with flame supervision and without pilot) Main air pressure drop Burner across the burner in osi designation 1 9 16 4570-9 2000 1500 1000 4570-12 1500 1600 1200 TABLE 4. Flame dimensions with 50% excess air length diameter Main air pressure drop Burner across burner, osi designation 1 9 16 4570-9 3 ½ ' x 1' 4' x 1' 3 ½ ' x 1' 4570-12 7 ½ ' x 1 ½ ' 8 ½ ' x 2' 8' x 2'
HiVAM Burners are suitable for furnace temperatures up to 1900°F. They can be used with preheated air up to 500°F.
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. 4570 Gas Burners are available with either direct spark ignition or spark ignited pilot. For widest stability limits on gas a constant air supply should still be introduced through the atomizing air connection: see Table 2 for main and atomizing air capacity and pressure ratings. Gas pressure requirements are 8 osig (or less) for natural gas (0.6 sp gr) at design capacity.
For the dual-fuel HiVAM firing natural gas or light oil, see Bulletin 6570.
FLAME SUPERVISION
4570 Burners equipped with spark ignited pilot use two UV detectors. 4570 Burners equipped with direct spark ignition require only one UV detector. See Sheet 4000-2 for general detail concerning direct spark ignition.
On a 4570 the pilot and pilot scanner must be interrupted after main flame is established, if equipped.
Bulletin 4570 Page 2
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