Open tube systems have been used for many decades, primarily for tempering furnaces. The recuperative burner systems, however, are relatively new.

AVION finned radiant tubes offer a larger surface area considerably improving their heat efficiency and distribution.

Because the fins are thread-shaped, an optimum flame distribution from the burner tip to the tube exit is achieved.

Further advantages of Si / SiC radiant tubes are:

• durability and reliability at temperatures up to  2450°F / 1350°C
• outstanding resistance against:
  - thermal shock
  - overheating
  - oxidization
  - carburizing
  - creep elongation
  - corrosive atmospheres
  - vibration
  - magnetizing
  - residues of detergents

heat flow: 125 BTU/in² / 7800 kWh/cm²