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Thermowells - TW22
Brand: WIKA Alexander Wiegand SE & Co. KGThe model TW22 thermowell is used to adapt thermometers and measuring inserts to the process and protects the sensor against harsh process conditions. The thermowell is mounted to a weld-in nozzle equipped with a respective hygienic connection and is built in pipelines and tanks.
Features- Materials and surface finish quality in accordance with the standards of hygienic design.
- Fully welded.
- Can be combined with models TR21-A and TR22-A electrical resistance thermometers, measuring insert exchangeable .
- Can be combined with mechanical thermometers, resistance thermometers and DiwiTherm®.
Specifications
Thermowell Materials (Wetted)
- Stainless Steel 1.4435 (316L, UNS S31603)
Surface Roughness of Wetted Parts
- Ra < 0.76 µm (SF3 per ASME BPE)
- Option:
- Ra < 0.38 µm (SF4 per ASME BPE)
- Ra < 0.38 µm Electropolished (SF4 per ASME BPE)
In Combination with Model TR21-A
- G 3/8” fixed
In Combination with Model TR22-A
- M24 x 1.5 Male Nut (Rotatable)
- Option: 1/2” NPT, fixed
In Combination with Models TG54 Oder 55
- M24 x 1.5 Male Nut (Rotatable)
- G 1/2 Female
- 1/2” NPT Female
- (Option only for Design S (Fixed), Design 2 (Rotatable threaded Connection), Design 4 (Compression Fitting), Design 5 (Union nut and loose threaded Connection)
In Combination with Models 73 (Design 3 / Union Nut) or TR75 (DiwiTherm)
- M24 x 1.5 Male Nut (Rotatable)
Models TR21-A or TR22-A
- Ø 4.5 mm for Ø 3 mm Sensors (Quick responding, only insertion length U1 ≤ 25 mm)
- Ø 6 mm Tapered to Ø 4.5 mm for Ø 3 mm Sensors (Quick responding)
- Ø 6 mm for Ø 3 mm Sensors
Models TG54, 55, 73 or TR75 (DiwiTherm)
- Ø 12 x 1.5 mm for Ø 8 mm Sensors
- Ø 8 x 0.9 mm for Ø 6 mm Sensors
Neck Tube Length M
- 85 mm
Neck Tube Diameter
- Models TR21-A or TR22-A
- Up to DN 20: 9 mm (Except per DIN 11851 (Milk thread Fitting): 12 mm)
- From DN 25: 12 mm
- Models TG54, 55, 73 or TR75 (DiwiTherm®)
- Same diameter as the thermowell diameter
Insertion Length U
- 25 mm
- 50 mm
- 75 mm
- 100 mm
- 150 mm
- 200 mm
- Option: up to 400 mm according to customer Specification
- Sanitary applications
- Food and beverage industry
- Bio and pharmaceutical industry, production of active ingredients