Product Overview | 4796-SG Magna-Flame ™
4796-SG Magna-Flame™ Gas Burners are designed to provide low NOx emission combustion performance in Enhanced Oil Recovery Once Through Steam Generator (OTSG) applications. The 4796-SG burner is based on the standard 4796 burner design, but through engineering, lab testing, and field testing the burner has been optimized for the OTSG application. Design changes included reducing the swirl and elongating the flame, while still providing the flame stability and consistency of flame geometry that all 4796 burners exhibit. The burner is also designed with packaged components for ease of installation and uniformity of system design. The standard burner for the 4796-SG has a nominal 34" air connection and is designed to fire on PUC Quality Natural Gas. Fives North American Combustion has also manufactured special burners of this design for sizes 20”-38” and for oil applications. Other special burner designs (e.g., alternate fuels and sizes) can be requested. Consult Fives North American Combustion, Inc. for special burner requests. PERFORMANCE. The 4796-SG Magna-Flame™ burner is designed to fire at 15% XSA. Below is a table of standard operating information for the 4796-34-SG standard burner.
CONTROL. It is recommended to use mass flow control systems with the 4796-SG.
PACKAGED COMPONENTS. The burner comes with the following packaged components: 4014-T Premix Pilot, Purge, Draft, and Low Fire Pressure Switches, NEMA 4 Ignition Transformer and Cable, NEMA 4 Junction Box, and UV Scanner Swivel Adapter SUGGESTED ADDITIONAL COMPONENTS. These components are not included with the burner, but it is recommended that they also be included in the system: Burner tile (mandrel for casting in place in the field), combustion air blower capable of meeting nominal design requirements, blower discharge rectangular transition flex connector, VFD combustion air control, fuel gas flow control butterfly valve with 1600 series pneumatic actuator and positioner. CONSTRUCTION. The body is fabricated using heavy duty welded steel featuring a round mounting flange, a refractory ring and an alloy air spin vane in the front. Connections for the pilot and flame detector can be factory-installed in any of several locations per customer specification. The 4796-SG has a 15 degree stationary air spin vane angle which produces the flame dimensions in the table in the performance section. The packaged components are designed for compact and close coupling with the burner to minimize total deck space. Due to that design, the 4796-SG has a longer body than the original standard 4796. PILOT AND FLAME SUPERVISION. 4796-SG Magna-Flame™ burners are packaged with a 4014 gas-boosted pilot, and provision must be made for low fire start with 1.0"w.c. or less main air. The UV detector location is placed 90° clockwise of the pilot when viewing the rear of burner (in the direction of air swirl). Self-checking UV scanners (sold separately) are recommended for flame supervision. See Bulletin 8832 for selection of UV adapters. It is possible for a UV scanner mounted on this burner to sight flame(s) of other burners in the same firing chamber. Consult Fives North American Combustion, Inc. for configuration guidance on multiple burner applications.
Flame Dimensions @ 6"w.c. & 15% XSA Flame Length Flame Diameter
Combustion Air Capacities (scfh) Multiply by 100 to get Btu per hour Air pressure drop across the burner, "w.c.
Burner Designation
6.0
1.0
3.0
4.0
4796-34-SG
563,000 976,000 1,130,000 1,380,000
35'
9'
Maximum recommended pressure.
LOW NOx OPERATION. Similar to the original 4796 Magna- Flame™ design, the 4796-SG Magna-Flame™ burner has a rapid mix, high swirl flame which produces lower NOx emissions than conventional gas burners. Due to its high swirl, rapid mix design, and stable flame the 4796-SG can utilize flue gas recirculation (FGR) to further reduce NOx emissions for applications where more stringent emissions control is required.
Bulletin 4796-SG Page 2
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