Si/SiC radiant tubes offer unsurpassable physical properties, faster heat-up times, longer life, and higher efficiency at competitive prices.
An innovation in the radiant tube technology without changing your burners, Si/SiC radiant tubes are made of natural raw materials according to a particular process.
Their advantages in comparison to conventional tubes made of heat-resistant high-quality steel or monolithic ceramics include durability and reliability at temperatures up to 2450 °F and outstanding resistance against:
Heat flow: 110 BTU/in²
Si/SiC radiant tubes can be used in all heat treatment processes in gas or electrically heated hardening or tempering furnaces and adapt to your existing burners. The tubes can be supplied with open ends, closed ends (recuperative system) and with corresponding flanges. Exchange systems ready for installation with radiant and flame tubes up to 6” diameter made of Si / SiC composite material for recuperative burner equipment are available immediately.
Si/SiC recuperative radiant tubes are absolutely maintenance-free.
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:
Heat flow: 125 BTU/in²
AVION MFG. is a supplier of radiant tube inserts made of Silicon-Carbide. The patented twisted “Y” design produces non-turbulent high convection flow. The subsequent radiated heat from the SpyroCor™ results in the highest rate of uniform heat transfer possible.
In a traditional radiant tube, 45% more energy is released in the burner leg than the exhaust leg due to the highly luminous flame. Both radiation and convection heat transfer are present in the burner leg. The hot gases in the exhaust leg have an emissivity of less than .05. Thus, convection heat transfer is dominant in the exhaust leg.
To Save Fuel, SpyroCors™, with an emissivity of .95, are installed in the last 2/3’s of the exhaust leg. Radiation and convection heat transfer are now present. The exhaust leg and burner leg are now balanced from a heat transfer standpoint. Input into the radiant tube burner is reduced by 20%. Energy available to the load is maintained.
Heat transfer is driven by temperature and is limited by heat transfer surface area. The patented multi-fin twist design of the SpyroCor™ doubles the amount of surface area available.
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