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Radiant Tube
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Radiant Tube
Radiant Tubes are specialized furnace heating elements designed to provide indirect, high-temperature heating in industrial furnaces and kilns.
They operate by housing heating elements (such as bundle rod heaters, cartridge heaters, or gas-fired burners) inside a sealed alloy or ceramic tube, which then transfers heat by radiation and convection to the furnace chamber.
This design isolates the heating element from the process atmosphere, protecting it from oxidation, carburization, or chemical attack, while ensuring long life, high thermal efficiency, and uniform temperature distribution.
Radiant tubes are widely used in heat treatment, carburizing, nitriding, and aluminium melting applications, where clean, controlled, and efficient heat transfer is required.
Advantages
- Protection of Heating Elements : Heating coils are completely isolated from the furnace atmosphere, minimizing scaling, oxidation, and chemical corrosione.
- High Efficiency & Emissivity : Radiant tube design ensures maximum infrared radiation transfer with reduced energy losses.
- Extended Service Life : Longer lifespan compared to exposed heating elements in aggressive furnace environments.
- Flexibility in Design : Available in straight, U-tube, or custom configurations to suit furnace design.
- Reduced Downtime : Radiant tubes can be replaced without shutting down the furnace.
- Process Cleanliness : Prevents contamination of sensitive furnace atmospheres such as carburizing, nitriding, and protective gas furnaces.
Applications
- Carburizing, nitriding, and galvanizing furnace.
- Melting, holding, and dosing furnaces (aluminium & non-ferrous industries.
- Dental and laboratory oven.
- Diffusion and semiconductor furnace.
- Heat-treatment kilns & research furnaces.
Features
- High emissivity alloys and ceramics for superior radiant heat transfer.
- Minimal scaling and spalling at elevated temperatures.
- Customizable end caps, flanges, and seals for different furnace conditions.
- Compatible with bundle rod heaters, cartridge heaters, or burners.
- Leak-tight seals to prevent gas leakage and heat loss.
- Length up to 3 meters, available in straight or shaped profiles.
- Quick installation and easy maintenance without major furnace downtime.
