High Vacuum or Controlled Atmosphere Vacuum Furnace


High Temperature Vacuum or Controlled Atmosphere Refractory Metal Heat Zone Furnace.

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19 SERIES High Temperature Vacuum Or Controlled Atmosphere Refractory Metal Heat Zone Furnace

The CENTORR Series 19 High Temperature, High Vacuum or Controlled Atmosphere, Cold Wall Refractory Metal Heat Zone Furnaces are extremely convenient to operate. The heat zone housing is raised hydraulically as a unit on a dovetail slide thus exposing the stationary work support hearth for loading or unloading. This furnace is particularly well suited to applications which require maintenance of precise positioning or assembly of the work during firing.

A furnace system typically consists of the basic furnace chamber assembly, the high vacuum system or evacuation system, the process gas system, the power supply, the temperature control instrumentation, and the furnace mounting system.

The unit is ready to operate as soon as power is connected to the main circuit breaker, process gas is supplied, and water inlet and drain connections are made.


  • Extremely convenient to load/unload
  • Clean, compact, vacuum tight construction
  • Use in vacuum inert, nitrogen, and hydrogen atmospheres
  • Low thermal mass - rapid heating and cooling
  • Accurate temperature control


HEAT ZONE SIZE:6.5" Dia. x 12" High to 14" Dia. x 24" High
TEMPERATURE:Up to 3000°C (5432°F)

Chamber is immobilized if

  1. heat zone is energized, or
  2. chamber is pressurized.

The furnace is completely assembled and thoroughly tested prior to shipping; a copy of test results will accompany shipment.


Applications & General Info

  • Brazing
  • Melting
  • Sintering
  • Heat Treating
  • Ceramic Firing
  • Degassing



The Basic Furnace consists of a double wall all stainless Steel, water-jacketed chamber containing The Heat Zone. The heat zone is resistance heated. The Heating Element is made of Refractory Metal. The Heat Shields are also all Metal. Heat zone Components are easily accessible for inspection or maintenance. A Hearth is provided for work support.

The entire inside of the furnace chamber is designed to Conform to the best High Vacuum Practice. Particular attention is given to the choice of heat zone materials and to surface finishes. Ports are provided for Sighting, Thermocouples, Evacuation, Inert Gas Inlet and exit, Gauges, etc. Centorr Vacuum Industries’ proprietary Rotatable Sight Window is included as standard equipment.


Standard High Vacuum Systems consist of High Vacuum Elbow; Diffusion Pump with Cold Trap; Mechanical Pump; Manual, Semi-Automatic, or Fully Automatic Valve System; all Copper Manifold; Viton "O" rings; and Combination Ion Gauge & Two-Station Thermocouple Gauge Vacuum Instrument.


Process Gas System consists of Vacuum-Tight Gas Inlet Valve and Relief Valve, Bourdon type Pressure Vacuum Gauge and Manifold. Process gas systems capable of handling multiple gases, including gas mixing, mass flow control, and gas analysis are available as options.

For inert atmosphere operation, the use of an optional gettering furnace, such as the CENTORR Model O2, is highly recommended.


Power Supply System consists of Silicon Controlled Rectifier Power Controller (Saturable Core Reactors also available) with Current Limit, Stepdown Transformer, Ammeter, Voltmeter, Push Buttons, Indicator Lights, Water Interlocks, all completely wired and packaged in an attractive floor standing cabinet. Power supply systems employing saturable core reactors are also available on request.

Utility requirements are given in KVA at customer's Primary Voltage, Single or Three Phase, and 50 or 60 Hertz.


Centorr/Vacuum Industries can supply control circuitry ranging from the simplest Manual Power Control to the most sophisticated intelligent Instrumentation. These controls can include Automatic closed loop control utilizing Thermocouples, Power Transducers, or Optical Pyrometers for sensing; and can incorporate Controllers, Recorders, and Programmers. Various types of Micro-Processor Programmers are now available and extremely popular.


The Furnace Chamber is mounted on a steel table.


For operation in the 10-50 Microns range of vacuum or for evacuation prior to backfilling with desired process gas, we include an Evacuation System. This includes a Mechanical Vacuum Pump, Vacuum Valve, and Manifold. Line Filter ahead of the vacuum pump, and Thermocouple type Vacuum Instrument are optionally available.


Centorr Vacuum Industries specializes in challenging custom-designed vacuum furnace and controlled atmosphere furnace solutions for a variety of difficult thermal processes. Learn More