Radiant tube burners

The main feature of RT burners is the dual air mixing. The primary air mixes on the combustion head; the secondary air, guaranteed by holes on the flame tube, completes the mixing making the flame longer. This extends the life of the radiant tube and increases the heat transfer efficiency. Calibration of RT burners is simplified by plugs for gas and air flow controls. Air-gas ratio usually used in radiant tube burners are 12:1, 13:1. RT burners may operate with cold air and preheated air up to 450°C (by using heat exchangers) allowing up to a 25-30% of energy saving.