Si/SiC Radiant Tubes
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:
- Thermal shock
- Overheating
- Oxidation
- Carburization
- Creep elongation
- Corrosive atmospheres
- Vibration
- Magnetization
- Residues of detergents
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.
Finned Tubes + Uniform Temperature = Considerable Energy Savings
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
- Outstanding resistance against:
- Thermal shock
- Overheating
- Oxidation
- Carburization
- Creep elongation
- Corrosive atmospheres
- Vibration
- Magnetization
- Residues of detergents
Heat flow: 125 BTU/in²
SILICON-CARBIDE INSERTS for Radiant Tubes
ZG Industrial. 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 ,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.
