MODEL HT VACUUM OVEN

• Operating Continuous Temperature Range: 100-1202° F (30-650° C)
• Operating Vacuum Range:  1.0 x 10^-2 Torr to1.0 x 10^-4 Torr
• Control Accuracy: +/- 2°C or 1% of span which ever is greater
• Rectangular Chamber Type Construction
• Standard Work Chamber Dimensions:
  • Model 30HT-HV – 30.00-in W x 30.00-in H X 30.00-in D
  • Model 24HT-HV – 24.00-in W x 24.00-in H X 24.00-in D
  • Model 18HT-HV – 18.00-in W x 18.00-in H X 18.00-in D
• Temperature Uniformity (9-pt survey results) measured at 1-Torr
  • Model 30HT-HV +/- 4.2°C
  • Model 24HT-HV +/- 2.7° C
  • Model 18HT-HV +/- 1.6° C
• Operating Voltages vs. Operating Vacuum Range
  • 1.0 x 10^-2 Torr 60V
  • 1.0 x 10^-3 Torr 120V
  • 1.0 x 10^-4 Torr 240V

The work chamber is constructed of either 316L or 310 stainless steel (depending on application), which houses the quartz glass elements.  The work chamber is then surrounded by the pressure vessel – constructed of 304L stainless steel and Georgia Oven Company’s proprietary high-strength reinforced gusseting system.  Other features include:

• Double O-ring door seals, water cooled

• Water cooled faceplate

• Multilayer insulation on the rear wall of the pressure vessel where chamber penetrations and ports are provided. 

• A top mounted powered or unpowered draft inducer port which aids in process cooling, maintains oven exterior at safe operator temperatures and reduces the amount of thermal loading to the surrounding environment. 

• The vessel door features Georgia Oven’s proprietary ultra-heavy gusseting system, providing anti-deflection capabilities during demanding thermal cycles.  Vessel doors utilize a multi-layer insulation system – maximizing efficiency, reducing losses and thermal loading to the surrounding environment.  The vessel door features multi-layer internal heat shields that produce a thermal drag between the work chamber and the vessel door, ensuring maximum safe operation and extended processing times. 
• Vacuum levels are achieved by utilizing the F4AV Controller and the Varian SenTorr high-vacuum gauge.  The Model HT-high Vacuum system control is made up of an event-based logic.  The F4AV controller issues digital output commands, which trigger the roughing valve, backfill valve, the high vacuum pump and its respective valves.  Set-point triggers are sent from the Varian SenTorr to the F4AV Controller via digital inputs – including chamber pressure, high vacuum pump backing pressures and high vacuum achievement.  This system is solely developed for high vacuum and does not accurately control pressures above 500-mTorr.  However, multilevel control systems are available and require PLC and touch-screen integration.  High vacuum pumping is typically done with Turbo Molecular type pumps, but Georgia Oven Company has expertise in Cryogenic and Diffusion systems as well.