E
C
dia.
D
*
sq.
Insulating
refractory
¾
" NPT – 3 holes for Flame Detector,
Observation Port, and Pilot Tip.
†
¾
" pipe plug furnished
for use if no Pilot.
§
Observation Port
G
P
See
‡
F
J
P
4425- -MB
Milk Bottle
shaped hole
T
–dia.
Inconel
Air Tubes
9" for 4425
13
½
" for 4425- -MB
K
N
A
pipe size
combustion
air inlet
B
pipe size
gas inlet
P
P
R
R
S
sq.
3
19⁄32
"
rad.
9
3⁄8
" BC
for 7-A, 7-B
and 8-A
8 -
½
" bolts
¾
" wide
slotted
holes
7
½
" BC for
-3, -4, -5
&
-6
8 -
3⁄8
" bolts
Section Y-Y thru Pilot
or Flame Rod opening.
3
19⁄32
"
rad.
45°
1
1⁄8
"
45°
Y
Y
Y
Y
NOTE:
For 4425-8-A, the air and gas connections cannot be piped in the same plane, as shown on other side, because the "fl ower pot" type
air connection fl ange would interfere with the 2
½
" gas line.
Burner
Wt,
Recommended
designation
A
B
C
D
E
F
G
J
K
N
P
R
S
T
lb
Pilot Set
4425-2
1
¼
1 5 8
½
½
5
¼
2 4
3⁄8
8
3⁄8
10
5⁄8
5
¼
6
12
3
76
4425-3
1
½
1 5
8
½
½
5
¼
2 4
3⁄8
8
3⁄8
10
5⁄8
5
¼
6
12
3
76
4425-4
2 1
¼
5 8
½
½
5
¼
2 4
3⁄8
8
3⁄8
10
5⁄8
5
¼
6
12
3
76
4425-5
2
½
1
½
5 8
½
½
5
¼
2
4
3⁄8
8
3⁄8
10
5⁄8
5
¼
6 12
3 76
4425-6
3 1
½
5 8
½
½
5
9⁄16
2 4
3⁄8
8
3⁄8
10
5⁄8
5
¼
6 12
3 76
4425-6-B
3 1
½
5 8
½
½
5
9⁄16
2 4
3⁄8
8
3⁄8
10
5⁄8
5
¼
6 12
3 76
4425-7-A
4 2
½
7
10
9⁄16
6
15⁄16
2
5⁄8
5
7⁄8
11 14
1⁄16
6
1⁄8
6
¾
13
½
4
½
130
4425-7-B
4 2
½
7
10
9⁄16
6
15⁄16
2
5⁄8
5
7⁄8
11 14
1⁄16
6
1⁄8
6
¾
13
½
4
½
130
4425-8-A
6
2
½
7
10
9⁄16
10
11⁄16
2
5⁄8
5
7⁄8
11 14
1⁄16
6
1⁄8
6
¾
13
½
— 139
4011-11
or
4011-12
dimensions in inches
*
Opening in furnace shell or outer wall must be
½
" larger than dimension "D" to allow for mounting plate fi llet and draft .
•
Warning:
set in wall with notches for pilot and fl ame rod in proper position relative to desired air pipe direction.
†
Pilot, Flame Detector, and Observation Port positions are interchangeable as long as Pilot and Flame Detector are in adjacent holes.
‡
¼
" air pressure tap on -2, -3, -4, -5 and -6.
1⁄8
" air pressure tap on -7-A, -7-B and -8-A.
"Flower pot" type fl ange for -8-A. Note larger F dimension.
§
For 4425- -MB Burners, a second observation port is substituted for the Pipe Plug.
The milk bottle tile is not off ered with the 4425-8-A Burner.
Tiles for 4425 Burners
Burner
designation
Standard
PN
Milk
Bottle
*
PN
4425-2 thru -6-B
70% Alumina
4-2121-2
80% Alumina OC4-2332-1
4425-7-A, -7-B, -8-A
70% Alumina
4-2142-2
80% Alumina OC4-2547-2
Bulletin 4425
Page 3
See Warning
•
DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSITON, INC.
IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL
.
Cop
yr
igh
t © 2021 - F
iv
es - All r
igh
ts
r
eser
ved | Bulle
tin 4425 04/21
WARNING:
Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot
surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot
surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.
*
All tiles are pre-fi red.
Maximum recommended use limit temperature is 3200°F for all tiles.
Fives North American Combustion, Inc.
4455 East 71st Street - Cleveland, OH 44105 - USA
www.fi vesgroup.com
CONTACT
fna.sales@fi vesgroup.com
T +1 800 626 3477 - F +1 216 373 4237
