North American 4950- -D Flame Grid with Duct Section
Ref: Bulletin 4950
For maximum installation convenience, 4950 Flame Grid Fume Destructor Burners are available assembled to refractory-lined cylindrical steel duct
sections of short length. Careful matching of components and factory installation of the burner ensures a correctly proportioned unit for thorough
incineration of fumes, odors, and smoke, provided suffi
cient oxygen is present in the effl
The preassembled duct section, designated 4950- -D, can be attached by welding or compression bands to upstream and downstream duct sections
supplied by the customer. Sections with exterior cylindrical dimensions matching the 4950- -D unit oft en are available from manufacturers of
prefabricated chimneys and stacks.
When installing, use enough upstream duct sections to ensure uniform air fl ow through the Flame Grid. Avoid elbows or tees too close to the burner
(three duct diameters minimum).
Duct dimensions downstream of the burner will be determined by residence time requirements. To be sure all effl
uent reaches incineration temperature,
size the aft erburner chamber to retain burner products for about 0.5-0.6 seconds (its inside cross-sectional area must be at least twice the nominal
burner area; e.g., 240 sq in. for 4950-2012). The aft erburner chamber should be constructed to withstand operating temperatures up to 1500°F. Actual
operating temperature will vary with the type of pollution handled.
The standard 4950- -D dœ s not have a refractory plug between the burner base plate and the grid plates.
designation D L lb
designation D L lb
44 19 1023
50 19 1267
57 19 1555
65 19 1971
78 19 2755
Refer to Bulletin 4950 for detailed burner dimensions.
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t 4950-4 08/01
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.
DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC.
IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL
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Fives North American Combustion, Inc.
4455 East 71st Street - Cleveland, OH 44105 - USA
T +1 800 626 3477 - F +1 216 373 4237