Custom Tunnel Kilns at a Small Scale

Gas-fired furnaces can produce remarkably different products compared to electric-fired furnaces. An excellent option to scale up while replicating the conditions present in resistance-heated batch furnaces is to use a bespoke Deltech tunnel kiln.

Depending on the user's process parameters, a tunnel kiln might be preferable to a production size “top hat”, bottom loader, or front load furnace, while still maintaining the rapid heating and cooling and exceptional temperature uniformity characteristic of Deltech non-continuous furnaces.

The list of many additional features that can be added to the user’s custom-designed and build tunnel kiln is shown below.

Tunnel Kilns.

Tunnel Kilns. Image Credit: Deltech, Inc


  • Gas analysis and sampling in preheat and exit zones
  • Single or multizone including preheat and cool down sections
  • Integrated scales for measurement and data logging of material weight changes
  • Sustained operating temperatures up to 1800 °C
  • Control systems are certified by Intertek UL508A compliant
  • Feeding options include screw conveyors, gravity feeds, and volumetric loading
  • Control systems made to order, just like your new kiln. PLC/HMIs for speed control, weight data, control trends, and temperature data are examples of features. The user’s desired brand of temperature controller can be supplied and integrated
  • Fiberboard or ceramic lined
  • The ability to add additional length as product demand grows
  • Gas curtains to protect the environment from materials outgassing
  • All systems are built to comply with UL508A, CSA 22.2, and NFPA 86 standards
  • Controlled atmosphere capability including gas mixing and delivery systems

Information Needed to Start the Design Process:

  • Number of zones
  • Product characteristics
  • Any required controlled atmosphere capability
  • Desired operating temperatures
  • Product dwell time at the desired temperatures
  • Workspace size
  • Temperature requirements of individual zones

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