Wika TR10-C Manual do Utilizador descarregar pdf (Página 21)

WIKA operating instructions resistance thermometers and thermocouples, Ex n

14106886.01 06/2014 GB/D

6.6 Tapered threads

Connections with tapered threads are self-sealing and normally must not be sealed. It should

be checked whether it may be necessary to seal them additionally with PTFE tape or hemp. The

threads must be lubricated with a suitable lubricant before tting.

Tighten the threads by hand when carrying out the nal assembly on the plant. This will

correspond to the delivery status of the premounted components. The nal tightening and sealing

must be made with a spanner (1.5 to 3 rotations).

6.7 Tightening torques

6.7.1 Tightening torques at the transmitter (model T32.xx.0NI)

Tightening torques

in Nm

Min. wire cross-section

in mm²

Max. wire cross-section

in mm²

0.4 0.14 2.5

6.7.2 Tightening torques at the ceramic terminal

Tightening torques

in Nm

Min. wire cross-section

in mm²

Max. wire cross-section

in mm²

2.5 0.14 2.5

6.7.3 Tightening torques between cable gland and connection head

■

Junction between cable gland and connection head

Thread Tightening torques in Nm

M20 x 1.5 12

½ NPT 30

■

Junction between cable and cable gland

Screw the male nut tightly into the adapter (use appropriate tools!)

6.7.4 Tightening torques between connection head and neck tube

Thread Tightening torques in Nm

Connection head material

Aluminium Stainless steel

½ NPT

32 35

¾ NPT

36 40

M24 x 1.5 with male nut

27 30

1) Only for versions with non-divisible neck tube

6. Commissioning, operation

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