North American Hot Spot Burners 4841-8-A and -8-B 4841-8-A and -8-B Hot Spot Burners fill the need for high capacity burners with short, concentrated flames.They are suitable for roof or wall mounting in both refractory and fiber lined furnaces. The standard burner assembly includes a 24" diameter, 70% alumina burner tile, that can be used in furnaces up to 3200°F, a heat resistant cast iron cover plate, and a rugged cast iron body. All internal burner parts that are subject to radiation from the furnace and the flame are made of alloy. Two parallel grooves around the circumference of the tile effectively lock it into the surrounding matrix of castable refractory or ramming mix, thereby preventing the leakage of hot gases from the
Sheet 4841-3
Ref: Bulletin 4841
furnace. Refer to Supplement DF-M1 for installation instructions for hard refractory lined furnaces. Consult Fives North American Combustion, Inc. for tiles designed for fiber-lined furnaces.
Pilots. Both burners use 4021-12 Pilot Tips. The pilot mixture pressure should be set at 3"w.c.
Flame Supervision. Pilot and main flames may be monitored by UV detector only.
Operating Characteristics At maximum input, the gas pressure requirement at the burner connection is 1.5 osi.
Burner
Measured parameters
Air pressure drop across the burner, osi
designation
0.1
1.0
4
8
12
16
Comb. air capacity, cfh Maximum % XSAir †
3500
11 000
22 000 31 000 38 000 44 000
800
300
200
250
300
4841-8-A
250
36-48
36-48
Flame length, in. Flame diameter, in.
–
24 18
30-36 36-48
16
18
18
18
18
Comb. air capacity, cfh Maximum % XSAir †
5250
16 500 33 000 46 500 57 000 66 000
700
120
75
100
90
4841-8-B
160
36-48
36-48
Flame length, in. Flame diameter, in.
–
24 18
30
36-48
18
18
18
18
16
† without pilot
DIMENSIONS inches
All dimensions except mounting dimensions are for estimating purposes only. Weight: 495 lb
¾ NPT pilot, flame detector, and observation port (3 holes)
42 ¼
16 ½
10 ¾
½ –13 NC thread
45⁄8 slots on 189⁄1 6 BC
5⁄8
2 gas inlet
24 dia.
20°
11 ¼
6
21⁄16
4 ¼ 83⁄8
145⁄8
Made with FlippingBook flipbook maker