Temp Pro Helical Thermowell Flyer

When standard thermowells are exposed to high velocity, their flows often fail the requirements of ASME PTC-19.3. There have been a few high temperature thermowell options but they come up short. One common remedy for this issue was to increase the diameters of the root and the tip. Alternatively, the immersion length may have been shortened. While these modifications prevented failure when exposed to high velocity, these modifications to the thermowell made it short and bulky and often yielded inaccurate results. When there is a sizable increase in the root and tip the response time increases. In this case, the heat dissipates into the nozzle and pipe. It also will reduce vibrations and allows the vibrations to transfer to the thermowell nozzle, instruments and piping. A shortened immersion length of the thermowell does not offer sufficient volume for heat transfer. This results in major errors in temperature measurements that are unacceptable.