Combustion Catalog | Fives North American

Dimensions | 4425 Fire•All™

DIMENSIONS IN INCHES

3.594" rad.

See Warning •

45°

1.25"

Section Y-Y thru Pilot or Flame Rod opening.

E

Insulating refractory

¾ " NPT – 3 holes for Flame Detector, Observation Port, and Pilot Tip. † ¾ " NPT pipe plug furnished for use if no Pilot. § Observation Port

7.5" BC for -3, -4, -5 & -6 8 - 3⁄8 " bolts

Y

45°

P

Y

See ‡

Y

Y

C dia.

G

D * sq.

0.75" wide slotted holes

P

3.594" rad.

9.375" BC for 7-A, 7-B and 8-A 8 - ½ " bolts

F

4425- -MB Milk Bottle shaped hole T –dia.

Inconel Air Tubes

A pipe size combustion air inlet 

B pipe size gas inlet

P

P

J

9" for 4425 13.5" for 4425- -MB 

R

R

K

S sq.

N

NOTE: For 4425-8-A, the air and gas connections cannot be piped in the same plane, as shown on other side, because the "flower pot" type air connection flange would interfere with the 2 ½ " gas line.

dimensions in inches

Burner

Wt, Recommended

designation

A

B C

D

E

F

G

J

K

N

P

R

S

T

lb

Pilot Set

4425-2 4425-3 4425-4 4425-5 4425-6

1.25 1

5 5 5 5 5 5 7 7 7

8.5 8.5 8.5 8.5 8.5 8.5

0.5 0.5 0.5 0.5 0.5 0.5

5.25 5.25 5.25 5.25 5.56 5.56 6.94 6.94

2 4.38 2 4.38 2 4.38 2 4.38 2 4.38 2 4.38 2.63 5.88 2.63 5.88 2.63 5.88

8.38 8.38 8.38 8.38 8.38 8.38

10.63 10.63 10.63 10.63 10.63 10.63 14.06 14.06 14.06

5.25 5.25 5.25 5.25 5.25 5.25 6.13 6.13 6.13

6 6 6 6 6 6

12 12 12 12 12 12

3 3 3 3 3 3

76 76 76 76 76 76

1.5

1

2 1.25 2.5 1.5

4011-11 or 4011-12

3 3

1.5 1.5

4425-6-B

10 10 10

0.56 0.56

11 11 11

6.75 6.75 6.75

13.5 13.5 13.5

4.5 4.5

130 130 139

4425-7-A 4425-7-B 4425-8-A

4 2.5 4 2.5

6 

0.56 10.69 

2.5

* Opening in furnace shell or outer wall must be 0.5" larger than dimension "D" to allow for mounting plate fillet and draft. • Warning: Mounting plate and tile can be separated from burner body for convenience during furnace construction; but for -2 through -6 sizes, tile must be set in wall with notches for pilot and flame 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 " NPT air pressure tap on -2, -3, -4, -5 and -6. 1⁄8 " NPT air pressure tap on -7-A, -7-B and -8-A.  "Flower pot" type flange 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 offered with the 4425-8-A Burner.

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 .

Bulletin 4425 Page 3

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