Coen duct burners provide stable combustion with the latest generation of turbines at TEG oxygen levels less than 11% by volume, wet. Heavy duty high alloy burner castings and rugged systems components assure reliability. Turndown range is over 20:1 firing gas, 5:1 firing oil without staging burners on and off. These duct burners are available in heat release ranges of more than 700 million Btu/hr. A factory packaged and tested piping module and a microprocessor based flame safeguard system are included with the duct burner.