WIKA TR - Maintenance and Cleaning; Maintenance; Cleaning

11208287.03 06/2010 GB/D/F/E
16
WIKA Operating Instructions RTDs and Thermocouples
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 C20 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. 45 HB
a
with a lling made of asbestos-free sealing material
Al = Aluminium Al99
F11, 32 to 45 HB
b
StFA = Soft iron, 80 to 95 HB
a
with a lling made of asbestos-free sealing material
6.4 Tapered threads (NPT)
Connections with tapered threads (NPT) are self-sealing and normally must not be sealed. It
should be checked whether it may be necessary to seal them additionally with Teon tape or
hemp. The threads must be lubricated with a suitable lubricant before tting.
Tighten the threads by hand when carrying out the nal assembly on the plant. This will corres-
pond to the delivery status of the premounted components. The nal tightening and sealing must
be made with a spanner (1.5 to 3 rotations).
7. Maintenance and cleaning
7.1 Maintenance
These thermometers are maintenance-free.
Repairs must only be carried out by the manufacturer.
7.2 Cleaning
CAUTION!
■
Before cleaning, correctly disconnect the instrument from the pressure supply,
switch it o and disconnect it from the mains.
■
Clean the instrument with a moist cloth.
■
Electrical connections must not come into contact with moisture.
■
Wash or clean the dismounted instrument before returning it, in order to protect
personnel and the environment from exposure to residual media.
■
Residual media in dismounted instruments can result in a risk to personnel, the
environment and equipment. Take sucient precautionary measures.
For information on returning the instrument see chapter "9.2 Return".
6. Commissioning, operation / 7. Maintenance and cleaning