In order to avoid any damage to the thermowell during operation due to mechanical loads, a thermowell calculation per ASME PTC 19.3 TW-2016 is recommended for critical process conditions. In case of a calculation with negative results, the only real constructive solution up to now was to shorten the thermowell stem or even to raise the root and tip diameter, accepting an extended response time of the thermometer.
The brand new ScrutonWell � design reduces the amplitude of oscillation by more than 90 % and allows a straightforward and fast installation of the thermowell without support collar, and therefore without expensive and time-consuming rework on site.
This helical design has been used successfully for decades in a wide variety of industrial applications to effectively suppress vortex-induced shrinkage excitation.
Aligned
Using flow conditions, a K�rm�n vortex street can develop behind the thermowell stem when it’s subjected to a flow inside a pipeline. Happiness includes two rows of vortices with opposite directions of rotation, which detach themselves to the left and the proper of the thermowell out of phase, which can instigate the thermowell to vibrate.
NEW ScrutonWell � design
Jaw-dropping , arranged around the thermowell stem of the ScrutonWell � design, break up the flow and thus impede the forming of a clearly defined K�rm�n vortex street. Through the reduced amplitudes of the diffused vortices, vibrational excitation of the thermowell is avoided.
The NEW ScrutonWell � design can be utilized for all sort of solid machined thermowells with flange connection, in Vanstone design or for weld-in or screwed process connection.
Note
More info on our thermowells are available on the WIKA website.
Learn more about the brand new ScrutonWell� design in the next video: