Worktubes, insulation plugs & seals

Optional Accessories

• A wide range of optional accessories include:
• wall mounting brackets
• 'L' stand allowing vertical and horizontal operation
• selection of worktubes including: impervious aluminous porcelain (IAP), mullite, recrystallised alumina (RCA), metallic (APM), sillimanite and silica.
• spares kit
• chart recorders
• ceramic insulation plugs
• radiation shields
• calibration certificates
• work tube seals for vacuum/controlled atmosphere applications
• overtemperature protection
• probe thermocouple for calibration and accurate measurement of workpiece temperature
• separate control boxes
• timeswitch
• process timers
• gas safety systems
• gas flowmeters
• gas safety systems
• furnace tables with heat resistance surfaces

Worktubes

• Some tube furnaces have an intregral ceramic worktube, others require one to be added to operate
• All tube furnaces require an additional ceramic or inconel worktube to allow the use of a gas atmosphere
• Various worktubes are available to suit different applications
• Sillimanite - porous, good thermal shock resistance, maximum temperature 1500°C
• Impervious aluminous porcelain (IAP) - impervious, maximum temperature 1400°C
• Mullite - impervious and resistant to flux, sulphurous & carbonaceous atmospheres, maximum temperature 1500°C
• Recrystallised alumina (RCA) - impervious and highly resistant to chemical attack (99.7% Al2o3), maximum temperature 1800°C
• Advanced powder metallurgy (APM) - impervious FeCrAl alloy tube, not susceptible to thermal shock, but unsuitable for use inside (MTF & CTF) wire wound tube furnaces, maximum temperature 1300°C

Insulation plugs & radiation shields

• These vital components must be fitted to all tube furnaces to prevent heat loss and ensure good uniformity
• Various types are available for different applications
• Ceramic insulating plugs
• Type C for a non atmosphere application
• Type D for an inert gas atmosphere application
• Radiation shields
• Type D metal discs for up to 1200°C high purity atmosphere or vacuum
• Type D alumina discs for up to 1800°C high purity atmosphere or vacuum

1. Probe thermocouple
2. Temperature indicator
3. Type C insulation plugs
4. Type D insulation plugs
5. Radiation shields
6. Work tube end flanges

Worktube seals

• Various seals are available to fit to worktubes to provide a gas tight seal
• Gas tight seals
• Gas tight seals with water cooling
• Vacuum tight seals with NW16,25 or 40 connection
• High vacuum tight seals
• High vacuum tight seals with water cooling