Products- Details

Innovation and continuous improvement is our mission. To provide our customers with the best applicable solution is our goal.


KKV- / KKH-model

tmax up to 2800 °C

Cold wall furnaces with metallic heater and metallic shield insulation package, gas and vacuum tight, Ø100 – 1000 mm, heated length 100 – 1000 mm, Tmax 2800 °C


annealing, sintering

The most important characteristics:

  • Thermal treatment of bulk material or solids
  • Resistance heated with molybdenum or tungsten heating elements
  • Max. operating temperatures up to 2800 °C
  • Insulation made of high quality molybdenum or tungsten sheets
  • Working chamber round or square / rectangular (depending on temperature and vacuum)
  • Working chamber design vertically or horizontally (depending on temperature)
  • Furnace concepts as front, bottom or top loader
  • Protective gas operation also with flammable gases
  • Burning-off device with flame supervision for safe operation when using flammable and explosive gases
  • Safety package for safe operation when using toxic, explosive/flammable gases
  • Gas warning system when using flammable and explosive gases
  • Vacuum operation up to a final vacuum of 5 x 10-6 mbar
  • Temperature measurement with thermocouple up to 1850°C, with Pyrometer starting from 1850°C
  • Wide range of options for customer specific adaption
  • Quality made in Germany
  • Easy handling 

We make it possible

Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes. 

Standard options:

  • Various temperature controllers
  • Viewing glass for visual process control
  • Process guiding software for complete control and documentation via PC 

Further options:

  • Up to 3 or more heating zones for best temperature distribution
  • Trailing thermocouple(s)
  • Suitable for glovebox operation
  • Gas-feeding device for one or more process gases
  • Gas pre-heating
  • Thermal post combustion or burning-off device
  • Emergency water changeover
  • UPS
  • Cooling water heat exchanger
  • Fast-cooling device with protective gas heat exchanger

Product Specifications

Technical details

Furnace housing

The furnace housing is mounted in a stable steel frame.

By means of a manual/mechanical/hydraulic lifting device, the furnace cover / bottom can be removed from the vessel.


The insulation exclusively consists of thin, metallic high temperature sheets (molybdenum, tungsten) and is designed individually depending on application and temperature.

Gas tight design

Gas flows in the working vessel can occur in various ways. A number of various process gases can be used.

Switch- and control unit

  • Safety controller for each heating zone for protecting heating and insulation
  • 3-phase thyristor controller for power control
  • Pre-transformer (if necessary)
  • Operating hour counter
  • PLC (e.g. Stange, Simatic, etc. optionally possible)
  • Data logger

Product properties

Product Line: type series
Operation Mode: Batch
Construction Types: Furnace
Designs: Bottom loader furnace, Chamber furnace
Temperature Max (°C): 2800
Heatings: electrical
Heatingmethods: resistance
Atmospheres: Controlled gas atmosphere, Vacuum
Applications: annealing, sintering