Tightening Torques - WIKA TC8 Serie Betriebsanleitung

3. Commissioning, operation

3.2 Tightening torques

EN
Only ever screw in, or unscrew, the instrument via the spanner flats and to the
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prescribed torque using an appropriate tool.
The correct torque depends on the dimensions of the connection thread and the sealing
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used (form/material).
When screwing in or unscrewing the instrument, do not use the connection head as
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contact surface.
When screwing in the instrument, please observe that the threads are not skewed.
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Assure that the purge gas connection is tighten and no gas can escape, so that there is
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no carry-through between zones.
8
Connection head, selectable (example)
Tightening torques between connection head and neck tube
Thread
1/2 NPT
3/4 NPT
M20 x 1.5 with counter nut
M24 x 1.5 with counter nut
Tightening torques between purge connection and purge piping
Thread
1/4 NPT
1) Turns from finger tight (T.F.F.T)
WIKA additional information TC82, TC83, flameproof enclosure (Ex d)
Tightening torques in Nm
Connection head material
Aluminium Stainless steel
T.F.F.T 2 - 3 T.F.F.T 2 - 3
1)
T.F.F.T 2 - 3 T.F.F.T 2 - 3
1)
23 25
27 30
Tightening torques in Nm
Connection head material
Aluminium Stainless steel
T.F.F.T 2 - 3 T.F.F.T 2 - 3
1)
1)
1)
1)