Engineering Data | 4570 HiVAM™
Table 1. Main Air Capacities scfh (Nm 3 /h) Burning with 50% excess air, which is the rich limit.
Main air pressure drop across burner
osi
0.2 0.3 0.9
1
4
9
16
16
"w.c. mbar
1.7
6.9 17.2
15.6
27.7
27.7
4570-9
4.3
39
69
69
scfh
9000 (241) 5200 (139) 950 (25.4)
13 500
39 300
59 000
80 000 96 000
Main Air Flow
(Nm 3 /h)
(361) 5200 (139) 1250 (33.4)
(1050) 5000 (134) 2950 (78.9)
(1577) 4900
(2138) 4500 (120) 5630
(2566) 5600
scfh
Atomizing Air Flow
(Nm 3 /h)
(131)
(150)
scfh
4260
0 0
Natural Gas Flow @ 50% excess air
(Nm 3 /h)
(114)
(150)
Gas pres. @ 50% excess air
"w.c. (mbar)
0
0.7 (1.7)
3.1 (7.8) 6.6 (16.4) 12.8 (31.9)
not burning use for sizing blowers
Max. % Excess Air , UV flame signal Max. % Excess Air, Igniton direct spark
1200 800 1200
2000 800 1800
1400
1500
1000
500
250
75
Max. % Excess Air, igniton pilot Flame Length @ 50% XSAir Flame Diameter @ 50% XSAir
1400
1400
900
feet (m) feet (m)
3.0 (0.9) 1.0 (0.3)
3.5 (1.1) 1.0 (0.3)
4.0 (1.2) 1.0 (0.3)
4.0 (1.2) 1.0 (0.3)
3.5 (1.1) 1.0 (0.3)
Main air pressure drop across burner
osi
0.2 0.3 0.9
1
4
9
16
16
"w.c. mbar
1.7
6.9 17.2
15.6
27.7
27.7
4570-12
4.3
39
69
69
scfh
19 300
43 100
82 500 (2205)
122 500
170 000 186 000
Main Air Flow
(Nm 3 /h)
(516) 4500 (120) 1590 (45.5)
(1152) 4400 (118) 3170 (84.7)
(3274) 3900 (104) 8430
(4544)
(4972) 4600
scfh
4300
3850 (103)
Atomizing Air Flow
(Nm 3 /h)
(115)
(123)
scfh
5790 (155)
11 600
0 0
Natural Gas Flow @ 50% excess air
(Nm 3 /h)
(225)
(310)
Gas pres. @ 50% excess air
"w.c. (mbar)
0
0.35 (0.9)
0.7 (1.7)
1.7 (4.3)
2.6 (6.5)
not burning use for sizing blowers
Max. % Excess Air , UV flame signal Max. % Excess Air, Igniton direct spark
500
1600
1600 500 900
1600
1200 600 800
50
250
500 750
Max. % Excess Air, igniton pilot Flame Length @ 50% XSAir Flame Diameter @ 50% XSAir
150
1000
feet (m) feet (m)
5.5 (1.7)
6.5 (2.0) 1.0 (0.3)
7.0 (2.1)
7.5 (2.3)
8.0 (2.4) 1.3 (0.4)
10.8 (0.2)
1.2 (0.37) 1.3 (0.4)
Notes: For widest stability limits, (even with natural gas firing) a constant air supply must be maintained through the atomizing air connection.
4570-9 Atomizing Air pressure = 24"w.c./60 mbar/14 osi 4570-12 Atomizing Air pressure = 14"w.c./35 mbar/8 osi Maximum Excess Air Precentage with flame supervision and without pilot 16 osi air is maximum firing rate. For Btu/h HHV, multiply scfh fuel flow by 100.
Bulletin 4570 Page 3
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