USEFUL CAPACITY RANGES —Ratings from 130 000 to 1 600 000 Btu/h HHV. 34.3 to 422 kW LLV
HIGH VELOCITY —Comparable to North American’s renowned 4442/44 Tempest® gas burner.
EASY INSPECTION/SERVICE —Air and gas piping need not be removed for complete access to internals.
DUAL-FUEL —Natural gas and/or distillate oil only. Not suitable for blends containing residuals such as Indian "LDO" or similar.
PREHEATED AIR CAPABILITY —To 800 °F (427 °C) main air temperature at the burner.
WIDE STABILITY RANGE —From 15% excess fuel to 400% excess air.
FUEL PRESSURES —Natural gas - 21"w.c. (52 mbar) #2 oil - 2.5 psig. (172 mbar)
UNIT CONSTRUCTION —The high temperature tile is secured in the main body section—no extra support is required.
6435 Tempest III Dual-Fuel burners can be used on heat treat and non-ferrous melting furnaces, kilns, and other applications where superior temperature uniformity and dual fuel operation is required. The 6435 operates similar to the 6422/6425 burn- ers but features a tile with a reduced outlet port that produces a much high velocity flame. The reduced port also offers better protection for the burner internal parts from furnace radiation. Dual-Fuel technology allows the burner to burn Natural gas, Propane, or distillate oil, like No. 2 heating oil or Diesel Fuel. High-pressure atomizing air is required to turn liquid fuels into a combustible mist. The atomizing air pressure should be set at a constant pressure regardless of the main air pressure. When burning distillate oil, the recommended atomizing air pressure is 30 osi/52"w.c. /129 mbar. When operating with natural gas the atomizing air is still required but the pressure can be set much lower. See table 1 for the recommended atomizing air pressure. Atomizing air helps keep the atomizer and oil nozzle cool when oil is not being used. It also helps to stabilize the flame when burning natural gas, and using little extra atomizing air may help LP gases to burn more reliably. The most common ratio control system for 6435 Burners when firing gas is a 7216 or 7218 cross-connected regulator. Install an 1807 limiting orifice close to the burner. For oil ratio control use a Ratiotrol™ regulator and an 1813 Sensitrol™ Valve as the limiting orifice. Install the Sensitrol™ Valve as close to the oil inlet con- nection as possible. The 6435 and 6422 Dual-Fuel burners are similar see Instructions 6422 for a typical piping arrangement. If furnace temperatures aer shutdown rises above 1900 °F, pass some air through burner to prevent overheating.
Bulletin 6435 Page 2
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