WIKA TW10-P - Manual (Page 8)

11405821.06 09/2010 GB/D/F/E
8 WIKA operating instructions thermowells
GB
Screw-fitting thermowells
When using parallel threads, a suitable seal should be used when mounting. Tapered threads
can be sealed by suitable seals or an additional welded seam. The correct tightening torques and
suitable tools (e.g. spanner) should be used.
Weld-fitting thermowells
Weld-in thermowells can be mounted into the process directly (pipe or vessel wall) or by using
a welding socket. Make sure that the weld seam is clean and that suitable equipment is used. If
necessary, heat-treat the weld seams.
Thermowells with flange connection
The flange dimensions of the thermowell must match those of the mating flange on the process
side. The seals used must be suitable for the process and the flange geometries (consult the
delivery note). The correct tightening torques and suitable tools (e.g. spanner) should be used
for installation. For thermowells with a collar, make sure that it matches the inner diameter of the
coupling and is supported by it. In the case of an interference collar, they should be adapted to the
inner diameter of the coupling.
Irrespective of the process connection, 3 mounting positions of thermowells in pipes are possible:
■ Right-angled position with respect to the flow (most unfavourable position)
■ Tilted position with respect to the flow (tip inclined towards the flow direction is preferred)
6. Commissioning, operation