Gas Flat Flame Excess Air Burners
Pyronics Sidewinder II
The swirling air stream of the Pyronics Sidewinder II Gas Flat Flame Excess Air Burner produces a negative vortex at the refractory block mouth. Gas enters the vortex, mixing rapidly, producing intense combustion. The inverted parabolic shape of the burner block port works with the vortex to pull flames flat to the furnace wall at firing rates and mixtures.
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Sidewinder Gas Burners are nozzle-mixing units with a high velocity, spinning, air flow. The swirling air stream produces a negative vortex at the refractory block mouth. Gas enters the vortex, mixing rapidly, producing intense combustion.
The inverted parabolic shape of the burner block port works with the vortex to pull flames flat to the furnace wall at firing rates and mixtures.
Sidewinder II Gas Burners may be installed in any position. The inside flared face of the Refractory Block must be flush with the interior furnace wall.
Minimum centerline distance between burners must be as shown in Table 2.
Wall Mounting Flanges are available to fasten the Block Holder to a Furnace Shell except for the SW-1 size. Lifting Eye-Bolt Hangers are available for Furnace Roof Suspension installations, except for SW-1.
Flexible Nipples are recommended for air and gas connections at the burner to allow for slight movement or misalignment of piping. The Flexible Nipples should be one pipe size larger than the pipe connection at the burner to allow for pressure drop.
To obtain the rated Blower Air Pressure at each burner the Air Header must be properly sized and the Pipe Run to each burner should be on pipe size larger than the pipe size at the burner. Line Gas Pressure must be adequate and the Gas Header must be properly sized to insure adequate gas flow at each burner.
All unused Pilot Flame Detector or Sight Ports must be plugged since a Back Pressure exists in the Burner Throat at high air flow rates.
When the Furnace Pressure is expected to vary considerably, a Biasing Line must be run to the Main Gas Regulator. Also, a Biasing Line should be run from the Pilot Mixture Line to the Pilot Gas Regulator to insure pilot stability at all Main Burner Firing Rates.
A Flame Detection Device is recommended on each burner for maximum furnace safety and ease of starting. Flame Detection is required on all Excess Air Installations and where furnace temperature is below 1400°F. Either Flame Rods or Ultra-Violet Scanners may be used. Pyronics Sens-A-Flame is recommended although other makes will operate satisfactorily.
When a Pilot is used, it should be installed in the port which is in the most clockwise position when viewing the burner from the outside. The Flame Rod or U.V. Scanner should be in the next adjacent port.
Table I - Burner Capacities
Table II - Burner Selection Aids
Sidewinder II gas burners must be ignited at low fire (when the air pressure at the burner is 1 inch water column or less). They can be ignited with a manual torch or a spark-ignited blast pilot or direct spark electrically installed in a threaded opening in the block holder. Pilots should be operated on an interrupted basis.
Main burner air should not be cut off when the furnace is hot since the air provides cooling for burner internals. The gas tube life will be adversely affected if air flow is cut off in a hot setting.
Refractory burner tiles are cast with a 60% alumina lightweight aggretage. Blocks are formed in rugged cast-iron holders with four stainless steel anchors embedded in the refractory. These threaded anchors extend out from the holder for installation of mounting brackets or lifting lugs. The standard refractory material used for burner blocks is rated by the manufacturer at 3000°F permitting continuous operation of a furnace up to 2700°F.
Burner bodies are cast-iron construction with 4-bolt flanged mouning to the block holder. Air and gas connections are Pyronics’ standard 4-bolt flanged type, threaded for pipe connections. No additional pipe unions are required for installation.
Gas entry to the burner body is flanged in the F series and equipped with gas adjusters in the GA series.
- Select number and size of sidewinder Gas Burners based on total heat input and heating patterns required.
- Specify quantity and catalog number of burners.
- Specify pilots required (see Page 3).
FEATURES & BENEFITS
- Flames Flat to Furnace Wall
- No Forward Velocity at Normal Firing Rates
- On-Ratio, Excess Air, or Excess Gas Firing (see Table 2)
- Simple Nozzle Mix Construction
- Flanged Air and Gas Connections - Fewer Pipe Unions Required
- 3000F Refractory Block
- Rugged Cast Iron Burner
- Pilot, Flame Detector Ports
- 10:1 Turndown, On-Ratio with 16 oz. Air at Burner
- Roof Mounting Support Lugs and Wall Flanges Available