Series 46 High Temperature Vacuum or Controlled Atmosphere Graphite Furnace

55 Northeastern Blvd,

Nashua, NH 03062

sales@centorr.com

Ph: 603-595-7233

Toll free: 800-962-8631

Fax: 603-595-9220

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Series 46
High Temperature Vacuum or Controlled Atmosphere Graphite Furnace

Annealing
Brazing
Crystal Growth
Ceramic Firing

Degassing
Heat Treating
Melting
Sintering

Features

Low initial cost
Efficient, inexpensive to use
Uncomplicated design, easy to operate
Clean, compact, vacuum tight construction
Use in vacuum, inert, or reducing atmospheres
Low thermal mass - rapid heating and cooling
Accurate and uniform temperature control

The Centorr Series 45 High Temperature Vacuum or Controlled Atmosphere, bottom Loading, Cold Wall, Graphite Furnaces are simple and easy to operate.

A furnace system typically consists of the Basic Furnace Chamber Assembly, Work Elevator Assembly, the Evacuation, the Process Gas System, the Power Supply, the Temperature Control Instrumentation, and the Furnace Mounting System.

These furnaces are built having Heat Zone sizes of 9" ID x 12" High to 36" ID x 36" High; and capable of operating 2500°C in Vacuum, in Inter Gas, or in Nitrogen. The Evacuation System is capable of attaining 10 - 50 Microns. The Furnace Chamber may be backfilled to 2 PSIG.

The Furnace is mounted on an open frame with the Vacuum System immediately behind (or to one side) for maximum efficiency. The Power Supply and Control Console are also located as close as possible to the Furnace Chamber.

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

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

Heat Zone Size	From 9" Dia. x 12" High To 36" Dia. x 36" High
Temperature	Up to 1000°C 1650°C 2000°C 2500°C
Operating Pressure	10-50 Microns to 2 PSIG
Programmer	Micro Processor Accuracy: ±10°C

Basic Furnace Chamber Assembly
The basic furnace consists of a double wall all stainless steel, water jacketed chamber, inside which is the heat zone. The heat zone is resistance heated. The heating element is made of solid Graphite. The heat shielding is Graphite Felt pressed into solid form. Heat zone components are easily accessible for inspection or maintenance. A graphite 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's proprietary rotatable sight window with gas port is included as standard equipment.

Loading is done through the full opening of the top cover which is pneumatically raised and manually swung to one side. Clamps are provided for operation to slightly above ambient pressure.

Evacuation System
For operation in the 10-50 Microns range of vacuum or for evacuation prior to backfilling with Inert Gas or Nitrogen, 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.

Process Gas System
Process Gas System consists of Vacuum tight Gas Inlet Valve and Relief Valve, Bourdon type Pressure-Vacuum Gauge and Manifold.

Power Supply System
Power Supply Systems consist of Silicon Controlled Rectifier Power Controller (Saturable Core Reactors also available) with Current Limit, Stepdown Transformer, Circuit Breaker, Contactor, Control Transformer, Ammeter, Voltmeter, Push Buttons, Indicator Lights, Water Interlocks, all completely wired and packaged in an attractive floor standing cabinet.

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

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

Furnace Mounting Assembly
The furnace chamber is mounted on an open support frame. Legs are provided with Leveling Pads. It is also possible to lag the support frame to the floor.