flat heating element / ceramic fiber

Fiber Insulated Heaters Type RDI combine a heat source with thermal insulation in one convenient package giving furnace designers a lightweight alternative to conventional dense refractory supported heaters. These units are designed to heat furnaces to a maximum temperature of 1300°C (2372°F) with power densities to 2200 w/ft2. They can also deliver power densities up to 4800 w/ft2 for extended periods at 700°C (1292°F).

RDI Fiber Insulated Heaters utilize powder metallurgy based, helically wound Fe-Cr-Al coil elements and rigid refractory bonded ceramic fiber insulation. Heating elements are positioned in open grooves in the insulation, allowing it to freely radiate. This minimizes the difference between the element and chamber temperature allowing it to operate at higher temperatures and longer periods than units with fully imbedded heating coils.

Alumina-Silica Insulation Type AXHTM is used to support the coils and insulate the heater. It is 100% organic free and will not smoke or outgas. Low thermal conductivity and mass allows the material to withstand extreme thermal cycling.