Thermowells / protection tubes

For each measuring point requirement the optimum thermowell / protection tube

Thermowells / protection tubes from WIKA are used with demanding operating conditions both in solid-machined versions from bar stock material and in fabricated versions with tubular design. The variants offered differ mainly in their designs; with flanges, threaded or for welding in. Furthermore, all connections for sanitary applications and also thermowells in solid-machined Vanstone design are available without weld seams. The selection of materials and the manufacturing of the thermowells / protection tubes in accordance with global standards or to customer specifications ensure optimal protection for the sensor.

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FAQ

What are suitable materials for thermowells and protection tubes for negative temperatures?

The first choice for high-temperature applications should always be stainless steel, such as 1.4404  (Approval per AD2000 W10 down to -270 °C) or 316L. Carbon steels should be considered carefully in detail, through the effect of the drop-off effect.

What do the markings on  'sealing faces to ASME B16.5' mean?

RF - Raised Face:
Sealing faces with a standard roughness "Stock Finish" 125-250 AARH to B16.5
RFSF - Raised Face Smooth Finish:
< 125 AARH (not defined in B16.5)
RTJ - Ring Joint Groove/RJF Ring Joint Face  < 63 AARH to B16.5
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