Series 10 Graphite Tube Furnace - Centorr Vacuum Industries

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 10
Graphite Tube Furnace

Annealing
Carbon Fibre Processing
Ceramic Firing
Heat Treating

Homogenization
Melting
Sintering
Wetting Studies

Features

Low initial cost
Efficient, inexpensive to operate
Uncomplicated design, easy to operate
Clean, compact, vacuum tight construction
Use in vacuum, inert, reducing or oxidizing atmospheres
Good accurate temperature control

General
The Centorr Series 10 High Temperature Vacuum or Controlled Atmosphere, Cold Wall, Graphite Tube Furnaces are simple and easy to operate.

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

These furnaces are built having Effective Heat Zone sizes of 2.4" ID x 4" ID to 14" Long or 4" ID x 6" to 16" Long, and capable of operating 2750°C in Vacuum, in Inert Gas, Nitrogen (or in Reducing or in Oxidizing Atmospheres with Muffle Tube Kit).

The Evacuation Kit is capable of attaining 10 - 50 Microns; the Furnace Chamber may be backfilled to 2 PSIG.

The Furnace chamber is usually mounted on a stand with the Evacuation System located behind for maximum efficiency. The Power Supply / Control Console are also located as close as possible to the Furnace Chamber.

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

Prior to shipment, the Furnace is completely assembled and thoroughly tested; a copy of test results will accompany shipment.

Heat Zone Sizes	2.4" ID x 4" to 16" Long 4" ID x 6" to 16" Long
Temperature	Up to 1000°C 1650°C 2000°C 2500°C 2750°C
Operating Pressure	10 - 50 Microns to 2 PSIG

Basic Furnace Chamber Assembly
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.

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 support is included as standard equipment.

Loading is done through easily opened lids at either end of the Furnace Chamber. Lids are held in place by Screws which permit 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 elaborate 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
The furnace chamber is mounted on top of a cabinet, either rigidly attached or simply resting on it. It can also be mounted on a stand completely in the open. It may be oriented Vertically, Horizontally, or at any desired angle. The Purge Port serves as its mounting point from which it may be swivelled without detaching from the evacuation system.

Options
Muffle Tube Kit
For operating in Oxidizing Atmospheres these furnaces can be supplied with a Refractory Muffle Tube which is sealed to the furnace at both ends. Muffle tube kits can also be provided with closure lids with ports for gas inlet and exit, and/or for sight windows or thermocouples.

High Pressure Version
This same furnace can be built to withstand up to 300 PSIG of internal pressure of Inert Gas or Nitrogen.