Vacuum furnace and protective gas furnace

The ThermoLine-VAC series comprises heating furnaces with gas-tight, double-walled water-cooled vessels. The furnace type is characterised by a high degree of versatility. Depending on customer requirements, the cold-wall furnace is designed for both high vacuum (1*10-6 mbar) and all common protective gas atmospheres, reaching temperatures up to 2800 °C. Depending on the temperature range and atmosphere, we use various heating elements made of graphite, molybdenum disilicide, tungsten or metallic alloys.

Areas of application

  • Sintering and debinding
  • Ardening and melting
  • Vacuum and inert gas brazing

Technical properties

Exemplary plant data (picture)

  • Dimensions: (L x W x H): 2000 x 2800 x 2900 mm³
  • Heated usable space (Ø, H): 460 mm, 600 mm
  • Max. batch weight: 100 kg
  • Connected load: 25 kW
  • Maximum temperature: 1200 °C
  • Atmosphere: vacuum up to 1*10-2 mbar, operation under protective gas (argon, nitrogen)

Measurement, control and regulation technology

  • Siemens PLC S7-1200 and industrial PC
  • Temperature measurement by thermocouple and pyrometer
  • Control according to product temperature, heating rates up to 150 K/h
  • Temperature ramping and automation of heating processes in recipes
  • Pressure control and monitoring
  • Documentation of process data for quality assurance


  • Powder-coated steel or stainless steel frame
  • Charging via lifting floor
  • Wall construction of the boiler:
       → Heating element
           → Thermal insulation
               → Stainless steel pressure vessel (double-walled, water-cooled)
  • High-alloy metallic heating elements in fibre plates
  • Control cabinet integrated on the rack
  • Vacuum pump integrated on the rack

Optional features and equipment variants

  • Pressure monitoring for quality assurance
  • Water-water heat exchanger
  • Active product cooling with inert gas
  • Atmosphere:
    • Vacuum
    • Reducing atmospheres
    • Protective gas/inert gas
  • Temperatures up to 2800 °C possible with other heating elements
  • Usable chamber dimensions
  • Various charging mechanisms

Ingolf Jaeger

Head of Sales
Dipl.-Eng. for mechanical engineering

Phone: +49 (0) 3731 1683-15

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