WIKA TR10-0 Mode D'emploi page 14

6. Commissioning, operation
6.3 Tightening torques
EN
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
14
Connection head, selectable (example)
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
1) Turns from finger tight (T.F.F.T)
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.
WIKA operating instructions models TR10-0, TC10-0 (Ex d)
Tightening torques
T.F.F.T 2 - 3
1)
T.F.F.T 2 - 3
1)
35 Nm
40 Nm
25 ... 30 Nm
35 Nm
35 ... 40 Nm
40 ... 45 Nm