WIKA DiwiTherm TR75 Betriebsanleitung Seite 12

6. Commissioning, operation
6.1 Parallel threads
If the thermometer connecting head, neck tube, thermowell or process connection are
connected to parallel threads (e.g. G ½, M20 x 1,5 ...), these threads must be secured by
means of seals preventing liquids from penetrating into the thermometer.
GB
As standard, WIKA uses copper profile seals for the connection between the neck tube
and the thermowell, and flat paper seals for the connection of the connection head and the
extension neck or 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.
11349981
11349990
11350008
11350016
11367416
1248278
3153134
3361485
11355352
1605933
Legend:
CuFA = Copper, max. 45 HB
with a filling made of asbestos-free sealing material
Al = Aluminium Al99
F11, 32 to 45 HB
StFA = Soft iron, 80 to 95 HB
with a filling made of asbestos-free sealing material
12
Designation
per DIN 7603 Form C 14 x 18 x 2 -CuFA
per DIN 7603 Form C 18 x 22 x 2 -CuFA
per DIN 7603 Form C 21 x 26 x 2 -CuFA
per DIN 7603 Form C 27 x 32 x 2.5 -CuFA
per DIN 7603 Form C20 x 24 x 2 -CuFA
per DIN 7603 D21.2 x D25.9 x 1.5 -Al
per DIN 7603 Form C D14.2 x D17.9 x 2 -StFA
per DIN 7603 Form C D33.3 x D38.9 x 2.5 -StFA
D15 x D21 x 3 -NP-Univ
D15 x D21 x 1 -NP-Univ
a
b
a
WIKA operating instructions DiwiTherm
Suitable for
threads
G ¼, M14 x 1.5
M18 x 1.5, G ⅜
G ½, M20 x 1.5
G ¾, M27 x 2
M20 x 1.5
G ½, M20 x 1.5
G ¼, M14 x 1.5
G 1
M24 x 1.5
M24 x 1.5
, model TR75
®