WIKA TR10-C - Handbuch (Seite 20)

14106886.01 06/2014 GB/D
20 WIKA operating instructions resistance thermometers and thermocouples, Ex n
GB
6.5 Parallel threads
If the thermometer connecting head, extension neck, thermowell or process connection are
connected with parallel threads (e.g. G ½, M20 x 1.5 ...), these threads must be secured using
seals which prevent liquids from penetrating into the thermometer.
As standard, WIKA uses copper profile seals for the connection between the neck tube and the
thermowell. If the thermometer and the thermowell are already connected, the seals will already
be mounted. The plant operator must check whether the seals are suitable for the operating
conditions and must replace them, if necessary, with suitable seals.
For thermometers without a thermowell, and/or where these are delivered separately, the seals
are not included and must be ordered separately.
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 torque
should be applied using a spanner (half rotation).
The seals must be replaced after dismantling!
The seals can be ordered from WIKA, indicating the WIKA order number and/or the
designation (see table).
WIKA
Order No.
Description 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
Legend:
CuFA = Copper, max. 45HB
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. Commissioning, operation