Tightening Torques - WIKA TR10-L Mode D'emploi

6. Commissioning, operation

6.3 Tightening torques

Only ever screw in, or unscrew, the instrument via the spanner-flats and to the prescribed
■
torque using an appropriate tool.
The correct torque depends on the dimensions of the connection thread and the gasket
■
used (form/material).
Screwing or unscrewing the connection head is not permitted.
■
When screwing in the instrument, please observe that the threads are not skewed.
■
6.4 Locking screw
WIKA operating instructions models TR10-L, TC10-L (Ex d)
Connection head, selectable (example)
Tightening torques for connection to neck tube
Thread
R 1/2
1)
1) only for versions with "nipple-union-nipple" neck tube
Tightening torques for connection to thermowell
Thread
1/2 NPT
3/4 NPT
G 1/2 B
G 3/4 B
M14 x 1.5
M18 x 1.5
M20 x 1.5
M27 x 2
Always tighten the locking screw to prevent unintended opening of
the head with flameproof enclosure.
Before opening the head, always loosen the locking screw
sufficiently.
Tightening torques in Nm
50 ... 60
Tightening torques in Nm
35
40
35
40
25 ... 30
35
35 ... 40
40 ... 45
GB
15