WIKA TR75 - Manual (Page 20)

11325232.04 01/2014 GB/D/F/E
20 WIKA operating instructions DiwiTherm ® , model TR75
GB
WIKA
Order no.
Designation Suitable for threads
11349981 per DIN 7603 Form C 14 x 18 x 2 -CuFA G ¼, M14 x 1.5
11349990 per DIN 7603 Form C 18 x 22 x 2 -CuFA M18 x 1.5, G ⅜
11350008 per DIN 7603 Form C 21 x 26 x 2 -CuFA G ½, M20 x 1.5
11350016 per DIN 7603 Form C 27 x 32 x 2.5 -CuFA G ¾, M27 x 2
11367416 per DIN 7603 Form C 20 x 24 x 2 -CuFA M20 x 1.5
1248278 per DIN 7603 D21.2 x D25.9 x 1.5 -Al G ½, M20 x 1.5
3153134 per DIN 7603 Form C D14.2 x D17.9 x 2 -StFA G ¼, M14 x 1.5
3361485 per DIN 7603 Form C D33.3 x D38.9 x 2.5 -StFA G 1
11355352 D15 x D21 x 3 -NP-Univ M24 x 1.5
1605933 D15 x D21 x 1 -NP-Univ M24 x 1.5
Legend:
CuFA = Copper, max. 45 HB a ; filled with asbestos-free sealing material
Al = Aluminium Al99; F11, 32 to 45 HB b
StFA = Soft iron, 80 to 95 HB a ; filled with asbestos-free sealing material
6.2 Tapered threads (NPT)
It should be checked whether it may be necessary to seal them additionally with PTFE tape
or hemp. The threads must be lubricated with a suitable lubricant before fitting.
Tighten the threads by hand when carrying out the final assembly on the plant. This will
correspond to the delivery status of the premounted components. The final tightening and
sealing must be made with a spanner (1.5 to 3 rotations).
7. Maintenance and cleaning
7.1 Maintenance
The DiwiTherm ® thermometer is maintenance-free.
The indicator should be checked once or twice every year.
To do this, the instrument must be disconnected from the process and checked using a
temperature calibrator.
DiwiTherm ® model TR75: battery powered (at least 10 years service life)
The battery is not replaceable!
Repairs must only be carried out by the manufacturer.
6. Commissioning, operation / 7. Maintenance and cleaning