wika TW22 衛(wèi)生型護(hù)套

Thermowells
for Sanitary Applications
Model TW22

Thermowells Model TW22 with welding ball (left) and
connection for VARIVENT® In-Line housing (right)

Thermowells Model TW22 with aseptic connection
DIN 11 864-1 (left) and Clamp connection (right)

Applications
Sanitary applications
Food industry
Beverage industry
Biotechnology and pharmaceutical industry, production of active ingredients
Paint-finishing systems

Special Features
Materials and surface finish quality in accordance with Hygienic Design standards
Thermowell material of the wetted parts stainless steel 1.4435
Fully welded
Combinable with Model TR22 electrical resistance thermometer, replaceable measuring insert
Combinable with mechanical thermometers,temperature switches, DiwiTherm®

Description
The Model TW22 thermowell is used for fitting thermometers or measuring inserts to the process, and protects the sensor against harsh process conditions. The thermowell is fitted to the appropriate hygienic connection via a weld-in socket and thus mounted into pipelines and tanks.
With a running nut to the connection head or display, it is possible to loosen these components and to adjust them in the desired position.

In combination with the Model TR22 resistance thermometer,the connection head and measuring insert, together,can be removed. This enables the thermometer and the
entire measuring chain to be calibrated, without even having to disconnect the electrical connections. The process does not need to be opened and thus the risk of
contamination is minimised.

Technical Data

Nominal size
See dimensional specification

Pressure rating PN
See dimensional specification

Material
Wetted parts: stainless steel 1.4435 (316L)

Surface roughness of the wetted parts
Ra < 0.8 μm (standard)

Options:
Ra < 0.4 μm
Electropolished Ra < 0.4 μm
Polished and electropolished Ra < 0.25 μm

Instrument connection
In combination with:
Model TR22 resistance thermometer
- male nut M24 x 1.5, running

- option: ½ NPT, fixed

Model 55 and Model 73 mechanical thermometers
Design 3 (union nut)
- male nut M24 x 1.5, running
- option: mechanial thermometers in Design S (fixed),
BF 2 (running nut), BF 4 (compression fitting),
BF 5 (union nut with fitting): G ½ or ½ NPT female thread

Thermowell diameter
For Model TR22 resistance thermometers
- Ø 6 x 1.4 mm for Ø 3 mm sensors
- Ø 6 x 1.4 mm tapered to Ø 4.5 mm for Ø 3 mm sensors(fast response)
- Ø 4.5 mm for Ø 3 mm sensors (fast response,insertion length U1: 25 mm)
- Ø 3 mm for Ø 2 mm sensors (only for BioControl® size 25)

For Model 55 and Model 73 mechanical thermometers,
Model TR75 DiwiTherm®, Model TR70 temperature switch
- Ø 8 x 0.9 mm for Ø 6 mm sensors
- Ø 12 x 1.5 mm for Ø 8 mm sensors

Neck tube length M
85 mm
Others on request

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