EXO-gas generators produces protective atmosphere for Heat Treatment furnaces. Lean Exo-gas or Rich Exo-gas is produced simply by changing the air to fuel ratio in burner.
Lean Exo-gas is produced by burning of fuels at slightly lower sub-stoichiometric combustion air to fuel ratio. This Exo-gas is lean in CO + H2 content. Lean Exo-gas generators are suitable for non-ferrous metals heat treatment.
Rich Exo-gas is produced by burning of fuel at high sub-stoichoimetric combustion of air to fuel ratio. So the Exo-gas produced is rich in CO + H2 content. Rich Exo-gas generators are used for heat treatment of steel and also brazing and annealing applications.
By providing a Refrigerated dryer after Gas generator dew point of (+) 5°C is achieved. For (-) 60°C dew point, a Molecular Sieves dryer is provided.
These gas generators are fitted with a specially designed Swirl Flame burner which gives soot free combustion and oxygen free Exo-gas even under sub-stoichiometric conditions. Burner is ignited by spark plug and flame is continuously monitored by UV-flame scanner.
Fuel supply to burner stops automatically and gas generator shuts down safely giving audio-visual alarm due to any problem like-low combustion air pressure, flame failure, low water flow or low fuel pressure.
The following fuels can be used in these Exo-gas generators: