Work Tube Packages

Each package comprises a work tube of the specified diameter with insulation plugs or heat shields appropriate for the operating atmosphere. The gas atmosphere and vacuum packages include a pair of end seals.

A 3 mm diameter probe thermocouple is included in all work tube packages for furnaces up to 1200 °C for connection to a separate display or recorder. Above 1200 °C, one end seal will have a 10 mm diameter thermocouple gland with a blanking plug to suit a probe thermocouple (probe thermocouple must be ordered separately).

The work tube material in the packages are:

• For TF, TS & TG 1200°C furnaces, mullite C610 / IAP or quartz is a choice.
• For TF 1600°C furnaces, there is a choice of RCA or mullite C610 / IAP.
• For F-range 1350°C furnaces, there is a choice of mullite or APM.
• For HTRH & HTRV 1800°C range furnaces, RCA tubes are used.

Alternatives to these packages can be created by selecting appropriate individual components

WORK TUBE PACKAGE 1 – FOR AIR

Tube furnace work tube package for air contains:

1. Standard length work tube
2. 2 x insulation plugs for standard-length work tube
3. Support bracket for insulation plugs & thermocouple
4. Probe thermocouple access:
   • Up to 1200 °C: Probe thermocouple gland complete with type N thermocouple
   • Above 1200 °C: 10 mm gland with PTFE seal and blanking plug to suit optional type R or B or 20/40 probe thermocouple assembly

WORK TUBE PACKAGE 2 – FOR GAS ATMOSPHERE

The work tube package for the gas atmosphere is suitable for either inert gas or hydrogen atmosphere.
If used with hydrogen, a gas safety system MUST be used.

Tube furnace work tube package for gas atmosphere contains:

1. Extended-length work tube
2. 2 x insulation plugs for extended-length work tube
3. Work tube end seals:
   • 1 x gas inlet/outlet pipe
   • 1 x gas inlet/outlet pipe + thermocouple gland
4. Probe thermocouple access:
   • Up to 1200 °C: Probe thermocouple gland complete with type N thermocouple
   • Above 1200 °C: 10 mm gland with PTFE seal and blanking plug to suit optional type R or B or 20/40 probe thermocouple assembly

WORK TUBE PACKAGE 3 – FOR VACUUM ATMOSPHERE

Available for work tube outer diameters 32, 60, 86, 125, 150, and 200 mm. Suitable for vacuum pressure to 5 x 10^-5 mbar depending on the type of vacuum pump used.

Tube furnace work tube package for vacuum atmosphere contains:

1. Extended-length work tube
2. 2 x radiation shields
3. Work tube end seals:
   • 1 x NW16 vacuum flange + thermocouple gland
   • 2 x end plates: 1 x NW25 (compatible with low vacuum pump package); 1 x NW40 for 60 mm work tube outer diameter or 1 x ISO-K 63 for 86, 125, 150 & 200 mm work tube outer diameters  (compatible with high vacuum pump package)
4. Probe thermocouple access:
   • Up to 1200 °C:
     Probe thermocouple gland complete with type N thermocouple
   • Above 1200 °C:
     10 mm gland with PTFE seal and blanking plug to suit optional type R or B or 20/40 probe thermocouple assembly