Duplex Series Furnaces provide two furnace assemblies on a single frame, sharing one transformer and control system. This allows one furnace to be under power while the other cools and is unloaded and reloaded. The result is extraordinary processing versatility with minimum capital investment. Other benefits include saving floor space and eliminating cross contamination of incompatible processes. Temperature ratings of 1250, 1600 and 1750 °C are available for processing workloads up to 500 pounds per chamber in wet or dry hydrogen or inert gas.

The Duplex Furnace utilizes the time-tested "bell" configuration in which the work is placed on a hearth and the heating element, radiation shields and chamber are lowered over the work. The refractory metal hot zones are clean, allow rapid heating and cooling and produce exceptional temperature uniformity. A microprocessor-based temperature programmer and programmable logic controller (PLC) provide completely automatic, unattended control with precise, repeatable results.

Process Programs can be quickly and accurately changed from one run to the next using optional memory cartridges. These capabilities allow a variety of products to be processed with confidence.

The Duplex series furnaces are designed with the user in mind emphasizing ease of installation, maintenance, programming and operation.

Typical Process Capabilities:

Chamber A Chamber B
All Temperatures

Ultra dry H2 brazing, e.g. S.S. at 800 °C without nickel plating.

 1250 °C

Wet H2 brazing or greening of S.S. fixtures, decarburizing Kovar
 

Dry H2 brazing of ceramic to metal assemblies.

1600 °C

Wet H2 metallizing of alumina with molymanganese.
 

Active metal brazing of ceramic to metal seals in argon.

Sintering tungsten in dry hydrogen.

 1750 °C

Wet H2 metallizing of alumina or AlN.

Impregnation of dispenser cathode

 

Ventura Duplex

B2500D
Specifications:
  • Temperature rating: 1250 °C, 1600 °C, or 1750 °C, continuous.
  • Hot zone materials: All nmolybdeum, with tungsten structural components in 1750 °C systems.
  • High vacuum pump: cryopump or turbomolecular pump. Ultimate vacuum, 5 x 10-8 torr or less.
  • Programmable loop and logic controller with operator interface; Honeywell UMC900 or Siemens S7-300.
  • Independent overtemperature protection:
    Honeywell, Inc. UDC 2000.
  • SCR Power Controller: Phase angle fired, instantaneous overcurrent trip, phase loss protection, subcycle fuses, water-cooled heat sink.
  • Transformer: Water-cooled, low temperature rise.
  • Hydraulic system for raising, lowering and clamping the chamber.
  • Process gas system: Fully interlocked, pressure regulated and flow regulated.
  • Hydrogen burnoff: Dual igniter coil with current sensing relay.
  • Power: 480 VAC ±5%, 3 phase, 60 Hz (optional 380/415 VAC, 50 Hz)
  • Hydrogen: 30-50 psig (2-4 bar) input.
    Process pressure: 0.5-2 psig (30-130 mbar).
  • Nitrogen (or Argon): 30-60 psig (2-4 bar) input. Process pressure: 0.5-2 psig (30-130 mbar).
  • Compressed air: 80-120 psig (5.5-8 bar).
  • Water flow: 15-60 gpm (55-340 lpm)
    @ 30 psi.
Montecito 2 View

 

60 Fitchburg Road, Ayer, Massachusetts 01432 USA
Tel: (978) 772.0710 or (800) 272-0710 USA & Canada
Fax: (978) 772-6462
E-mail: sales@avsinc.com

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