Temperature Is Our Business


After extensive R&D and independent evaluation, we have developed a unique design of thermowell, the VortexWell®, which doesn’t require a velocity collar and is cost-effective for the end user in terms of purchase, installation and maintenance costs.

VortexWell® incorporates an innovative helical strake design, very similar to the helical strakes seen on columns and cooling towers. By using the latest CFD software to visualise the flow behaviour, we were able to accurately compare a standard tapered thermowell and its new VortexWell®. In the tests, the standard tapered thermowell showed classic shedding behaviour as expected, whereas the VortexWell® demonstrated no signs of regular flow behaviour. The VortexWell® helical strake design disturbed the flow sufficiently to interrupt the regular formation of vortices. Whilst a small vortex was observed in the wake of the VortexWell® this was a localised stagnation point and didn’t shed.

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Standard Thermowells...

Okazaki Thermowells are used with demanding operating conditions both in solid-machined versions from solid-body material and in fabricated versions with tubular design.

The variants offered differ mainly in their designs; with flanges, with threads for screwing in or for welding in.

Furthermore, thermowells in solid-machined Vanstone design are available without weld seams.

The selection of materials and the manufacturing of the thermowells in accordance with global standards or to customer specifications ensure optimal protection for the sensor. Material selection for the manufacture of solid drilled thermowells are of the highest quality. Strict quality control is applied to both materials selection and the manufacturing process.

Okazaki offer bespoke and industry standard design thermowells, complete with wake frequency calculations to ASME PTC 19.3 TW-2016.

The Okazaki VortexWell is used where the use of support collars is not recommended.



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Whatever your question, whatever your project, drop us a line and we'll get back to you asap.

Contact Details

t: +44 (0)2920 814 333
e: sales@okazaki-mfg.co.uk

Manufacturing Company
UK Limited

S4C Media Centre,
Parc Ty Glas,
CF14 5DU
United Kingdom