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Cold Wall Furnaces

  • Carbonization Furnace with controlled Nitrogen Atmosphere
  • Furnace with Controlled Nitrogen Atmosphere
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For very large sized parts, a Cold Wall Furnace may be an economical way to avoid the costly retort.
 
Keith Cold Wall Furnace technology injects the controlled atmosphere into a space between the furnace steel shell and the insulation system, with a proprietary method of ensuring uniform atmosphere flow throughout the system lining. This method is advantageous where the part size and process temperature make a retort either a very expensive consumable or impractical from a material strength aspect.  While this method increases initial purge time and purge-down gas consumption, on long cycles a significant savings can be realized, and temperatures unobtainable with a metallic retort can be used.