Do not operate fuel rich. (consider a 4821-R for rich high velocity operation)
Air capacities
not burning, scfh
Direct
Burner
(use to size blowers)
Pilot
spark
Flame
designation
1
9
16
16 osi
set
igniter
Rod
4575-8-A
325
400 350
55
000
4011-12 4055-E —
4575-8-B
650
500 750
81
000
4011-12 4055-E —
4575-9
800
900
1200
116
000
4011-12
4055-E
4-25432-4
4575-10-A
675 800 900
145
000
4011-12 4055-E 4-25432-4
4575-10-B
1100 1300 1200
177
000
4011-12 4055-E
4-25432-4
4575-12
1500
1200
1000
199
000
4011-12
4055-E
4-25432-11
4575-14
1200
1200
1200
388
000
4011-12
4055-E
4-25432-11
combustion air pressure, osi
Maximum excess air rates in %
COMBUSTION AIR CAPACITIES
scfh
(for Btu/h HHV, multiply by 100)
Burner
combustion air pressure drop across the burner in osi (inch w.c.)
designation
0.2 (.35)
1 (1.73)
4 (6.9)
9 (15.6)
16 (27.7)
16 osi air)
4575-8-A
4 400
9 400
19 600
31 000
41 500
5
4575-8-B
5 250
13 300
29 500
43 600
62 000
6
4575-9
9 200
21 000
44 000
64 000
89 000
9
4575-10-A
10 600
23 800
47 600
72 500
101,000
8
4575-10-B
12 500
28 000
57 500
85 000
119 000
10
4575-12
19 100
42 700
81 500
118 000
164 000
10
4575-14
34 000
64 000
124 000
188 000
250 000
17
Flame length
(stoichiometric ratio,
Bulletin 4575
Page 3
Capacity | HiRAM
®
INSTALLATION AND OPERATION
HiRAM®s are suitable for furnace temperatures up to 2400°F.
They can be used with preheated air up to 600°F. The reduced
tile discharge opening also protects burner internals from radiant
heat and from melting furnace splash. Standard burners include
3000°F dense castable tiles.
Burner tile installation should be made in accord with instructions
on Supplement DF-M1 for hard refractory lined furnaces or DF-
M2 for fi ber lined furnaces. It is generally not necessary to use a
metal jacketed tile in fi ber lined furnaces with 4575 burners.
The HiRAM® burners can be used with a variety of control
systems including pressure-balanced or electronic fuel/air ratio
systems. The gas pressure requirement is approximately 0.7 that
of the combustion air when fi ring on stoichiometric ratio.
System pressure drops should be checked to make sure that
adequate gas pressure will be available at the burner. In order
to avoid any potential combustion driven oscillations which can
produce excessive noise or vibration, it is imperative that a limit-
ing orifi ce valve be installed within 5 pipe diameters (5D) of the
gas connection.
Standard 4575 HiRAM® burners can be used with Natural Gas or
Propane. They are not designed for fuel rich operation, or fuels
that contain Propylene or Hydrogen. Prolonged fuel rich opera-
tion may damage the burner.
LIGHTING AND FLAME SUPERVISION
A gas pilot or direct spark igniter can be used to light 4575
HiRAM® burners when the main air is set to a low fi re rate.
Flame supervision systems will detect a pilot fl ame more reliably
if the main burner air pressure is set at or below 1.5 osi (2.5"
wc). Direct spark igniters light 4575 HiRAM burners more reliably
when the combustion air pressure is set below 4.0 osi (7"w.c.).
See Sheet 4000-2 for general details concerning direct spark
ignition.
Ports on the bottom of a burner can get blocked with debris,
and spark igniters work best when installed in the top or side
positions. Avoid confi guring the ignition/fl ame supervision ports
on the bottom quadrant of the burner. Torch lighting is not
recommended because of high tile pressures.
HiRAM® burners (except the -8-A and -14 sizes) are available in
dual fuel (gas/light oil) models -- see Bulletin 6575. A gas pilot is
required for lighting oil in a 6575.
UV fl ame detection can be used for all HiRAM® sizes or fl ame
rods in 4575-9 through 4575-14 sizes. See table below for pilot,
igniter, and fl ame rod part numbers.
Medium velocity 4575 burners operate at reduced air pressures compared to the high velocity versions listed above.
