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WIKA TW20
WIKA TW20 – (Weld-in thermowell) WIKA/Germany
Applications
- Petrochemical industry, on-/offshore, plant construction
- For high process loads
Special features
- Different dimensions for standardised welding sockets
- International standard
- Possible thermowell forms:
– Design TW20-A: tapered
– Design TW20-B: straight
– Design TW20-C: stepped
Description
Each thermowell/protection tube is an important component of any temperature measuring location. It is used to separate the process from the surrounding area, thus protecting the environment and operating personnel and keeps aggressive media, high pressures and flow rates from the temperature probe itself and thereby enables the thermometer to be exchanged during operation.
Based on the almost limitless application possibilities, there are a large number of variants, such as thermowell designs or materials. The type of process connection and the basic method of manufacture are important design differentiation criteria. A basic differentiation can be made between threaded and weld-in thermowells/protection tubes, and those with flange connections.
Furthermore, one can differentiate between protection tubes and thermowells. Protection tubes are constructed from a tube, that is closed at the tip by a welded solid tip. Thermowells are manufactured from solid bar stock.
The TW20 series of weld-in thermowells are suitable for use with numerous electrical and mechanical thermometers from WIKA.
Due to the heavy-duty design, these international design thermowells are the first choice for use in the chemical and petrochemical industries and in plant construction.
WIKA TW20
| Versions | ■ Design TW20-A: tapered
■ Design TW20-B: straight ■ Design TW20-C: stepped Option: ■ Injection quills version |
| Thermowell materials | ■ Stainless steel 316/316L
■ Stainless steel 304/304L ■ A105 ■ Stainless steel 1.4571 ■ Special materials Other materials on request |
| Process connection | ■ Ø 26.7 mm [¾ in]
■ Ø 33.4 mm [1 in] ■ Ø 48.3 mm [1.5 in] Other threads on request |
| Connection to thermometer | ■ ½ NPT female
■ G ½ female ■ “Quill Tip” version with weld-in connection ½ in and ¾ in Other threads on request |
| Bore size | ■ Ø 6.6 mm [0.260 in]
■ Ø 8.5 mm [0.355 in] |
| Insertion length U | To customer specification |
| Connection length H | To customer specification |
| Max. process temperature, process pressure | Depending on:
■ Thermowell design – Dimensions – Material ■ Process conditions – Flow rate – Density of medium |
| Wake frequency calculation (option) | Per ASME PTC 19.3 TW-2016 recommended in critical applications as a WIKA
engineering service For further information see Technical information IN 00.15 “Wake frequency calculation”. |
