Wika TR10-C Manual de usuario descargar pdf (Pagina 22)

14106886.01 06/2014 GB/D

WIKA operating instructions resistance thermometers and thermocouples, Ex n

6.7.5 Tightening torques for connection to thermowell

Thread Tightening torques in Nm

½ NPT 35

¾ NPT 40

G ½ B 35

G ¾ B 40

M14 x 1.5 25 ... 30

M18 x 1.5 35

M20 x 1.5 35 ... 40

M27 x 2 40 ... 45

6.7.6 Tightening torques for compression tting

Sealing Turns Max. pressure in bar

Stainless steel ferrule 1 ¼ ... 1 ½ 100

Stainless steel compression ring 1 ¼ ... 1 ½ 100

PTFE ferrule 1 ¼ ... 1 ½ 8

7. Information on mounting and operation in hazardous areas (Europe)

7.1 General information on explosion protection

Follow the requirements of the 94/9/EC (ATEX) and IEC directives.

Additionally the specications of the respective national regulations concerning Ex

usage apply.

A) The responsibility for classication of zones lies with the plant operator and not the

manufacturer/supplier of the equipment.

B) The plant operator guarantees, and is solely responsible, that all thermometers in use are

identiable with respect to all safety-relevant characteristics. Damaged thermometers may

not be used. Repairs may only be carried out by authorised and qualied personnel. Repairs

may only be completed using original spare parts from the original supplier; otherwise the

requirements of the approval are not fullled.

The manufacturer shall not be responsible for constructional modications after delivery of the

instruments.

C) If a component of electrical equipment, on which the explosion protection depends, is

repaired, then the electrical equipment may only be put back into use, after an authorised

expert has stated that it corresponds to the fundamental characteristics of the requirements

for explosion protection. In addition this expert must provide a certicate for this and provide

the equipment with a test mark.

6. Commissioning, operation / 7. Information on mounting and ...

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Wika TR10-C Manual de usuario Pagina 22