The VENTURA series 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. 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.

A wide range of options are available to tailor the furnace to individual requirements including: high vacuum systems, process gas dryers for low dewpoint processing, rapid cooldown blowers and mass flow controlled gas streams.

Atmospheres available include:

• High vacuum (5 x 10^-8 torr)
• Hydrogen (dry or wet)
• Inert gas (nitrogen, argon, helium)
• Atmosphere or partial pressure

The VENTURA series furnaces are designed with the user in mind, emphasizing ease of operation and maintenance and long-term reliability.

Typical Process Applications:

• General vacuum or hydrogen brazing
• Dry hydrogen brazing of ceramic to metal seals
• Active metal brazing of ceramic to metal seals in argon or vacuum
• Wet hydrogen fixture greening
• Wet hydrogen metallizing of alumina with molymanganese (1600°C)
• Wet hydrogen metallizing of alumina with tungsten (1750°C)
• Decarburizing Kovar
• Ceramic sintering and fusion bonding (1750°C)
• Metal Injection Molding (MIN)
• Cofiring ceramic interconnect packages
• Vacuum sealing high voltage interruptors

• Temperature rating: 1250 °C, 1600 °C, or 1750 °C continuous.
• Hot zone materials: All molybedenum with tungsten structural componenets 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 2500.
• 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: 10-90 gpm (40-340 ltr/min)
  @ 30 psi.