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Vacuum furnaces

Vacuum furnaces are intended for degassing, brazing, annealing and quenching in vacuum or inert gas atmosphere. Examples can be: removal of stress after forming processes, component part surface cleaning (degassing), capillary brazing and similar. Manufactured units characteristic features are their outstanding mechanical design and industrial computer control with the option of process data archiving. They are manufactured for utilization in the areas of low or high vacuum or inert gas atmosphere. Besides standard products we can also offer design and manufacture of a vacuum oven according to your specific requirements.

High-temperature vacuum furnace

VP 450

Vertical high-temperature vacuum furnace VP450 is a universal unit enabling charge thermal processing in vacuum or inert gas atmosphere. The VP450 vacuum oven is especially intended for capillary brazing, bright annealing, sintering, tempering, diffusion welding and degassing. Its maximum operating temperature is 1200 °C.

Capillary brazing: Joined parts show no deformation, it is possible to join different materials such as steel, stainless steel, copper and other. The brazed joints are vacuum tight, mechanically very strong. In brazing there are used various solder materials on the base of copper, nickel, silver and the like.

Technical description

VP450 is a single-chamber resistance vacuum furnace with cold walls. The high-vacuum part of the furnace including the recipient is made of stainless steel. The resistance brazier, thermal shielding and the charging table are made of molybdenum and stainless steel. The recipient double jacket is cooled by flowing water. Recipient lifting is hydraulic. The vacuum source is a pumping assembly consisting of a rotation and a turbo-molecular or a diffusion vacuum pump. Fully automatic or manual operation is ensured by an industrial control computer with touch LCD screen. Besides the process control and important parameters monitoring, the control system protects against erroneous operation by blocking undesirable functions and conditions of the unit. Working cycle course is fully monitored by the control system; it is possible to archive process data or output records, print and store them. The vacuum oven part containing control, power and electrical installation is positioned in a special stand near the oven.

Function possibilities

  • Oven operation in low vacuum area
  • Oven operation in high vacuum area
  • Oven operation in pressure regulated by inert gas introducing both in the stage of heating and charge cooling
  • Charge self-cooling in vacuum
  • Self-cooling in inert gas presence

Technical parameters

Electrical system: TN-C-S 3x230/400V, 50Hz
Power input: 40 kW
Protection: IP 54/20
Max. operating temperature: 1 200°C
Weight: 2 500 kg
Oven limit pressure (clean and empty oven):

  • Turbo-molecular vacuum pump: 1.10-6 mbar
  • Diffusion vacuum pump: 1.10-6 mbar

Recipient movement: hydraulic, stroke 800 mm, side deflection
Pressure air: 8 bar
Inert gas (Ar, N): 0,1 bar
Charge : diameter 330 mm x height 380 mm, weight 50 kg
Ambience: average 15 - 25°C, relative humidity 80 %

Cooling liquid:

  • temperature: max. 20 °C
  • pressure: 2-4 bar
  • carbonate hardness: 4-6° 1.43 to 2,14mval*l-1
  • reaction: 8,8 pH
  • pumping circuit consumption: 7 l/min (420 l/h
  • chamber circuit consumption: 20 l/min (1200 l/h)

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