High-Temperature Tube Furnaces for Horizontal and Vertical Operation up to 1800°C Gas Atmosphere or Vacuum

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The high-temperature tube furnaces are available in either horizontal (type RHTH) or vertical (type RHTV) designs. High-quality insulation materials made of vacuum-formed fiber plates enable energy-saving operation and a fast heating time due to low heat storage and heat conductivity. By using different gas supply systems, operations can be performed under non-flammable or flammable protective or reactive gases or under vacuum.

• Tmax 1600 °C, 1700 °C, or 1800 °C
• MoSi2 heating elements, mounted vertically for easy replacement
• Insulation with vacuum-formed ceramic fiber plates
• Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
• Rectangular outer housing with slots for convection cooling
• Tube furnaces RHTV with frame for vertical operation
• Dual shell housing made of sheets of textured stainless steel
• Ceramic working tube made of material C 799 incl. fiber plugs for operation under air
• Type B thermocouple
• Power unit with low-voltage transformer and thyristor
• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load and with selectable maximum temperature gradient as tube protection
• Switchgear and control unit separate from furnace in separate floor standing cabinet
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Charge control with temperature measurement in the working tube and in the furnace chamber outside the tube
• Display of inner tube temperature with additional thermocouple
• Gas tight flanges for protective gas and vacuum operation
• Manual or automatic gas supply system
• Three-zone control for optimization of temperature uniformity (only tube furnaces RHTH)
• Check valve at gas outlet avoids intrusion of false air
• Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control