RTD Sensor, Thermocouple & Thermowell Technical Info by Pyromation

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Pre-Heating Ceramic Protection Tubes

The following information applies to both the Mullite and Alumina versions of the ceramic protection tubes.

Installation into a running process

Insert the ceramic protection tube into a running process at the rate of 1” per hour per 100°C to prevent thermal shock and possible breakage. For example, if your furnace is operating at 600°C, then you should take six hours to insert the ceramic tube into the furnace.

Installation into a cold process (startup)

If your ceramic tube is already installed in a cold process, the heat should increase at a rate of no more than 100°C per hour to minimize thermal shock to the tube.

These are general guidelines only. If you have specific questions regarding your particular process, please contact Pyromation for technical assistance.