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5. Commissioning, operation
14150915.07 11/2020 EN/DE/FR/ES
WIKA operating instructions, models TRxx and TCxx18
5.4.2 Tightening torques between connection head and neck tube
Thread Tightening torques
Connection head material
Aluminium Stainless steel
½ NPT T.F.F.T 2 - 3
1)
T. F. F. T 2 - 3
1)
¾ NPT T.F.F.T 2 - 3
1)
T. F. F. T 2 - 3
1)
M24 x 1.5 with pressure screw
2)
27 Nm 30 Nm
5.4.3 Tightening torques for connection to thermowell
Thread Tightening torques
½ NPT T.F.F.T 2 - 3
1)
¾ NPT T.F.F.T 2 - 3
1)
G ½ B 35 Nm
G ¾ B 40 Nm
M14 x 1.5 25 ... 30 Nm
M18 x 1.5 35 Nm
M20 x 1.5 35 ... 40 Nm
M27 x 2 40 ... 45 Nm
5.4.4 Tightening torques for compression fittings
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
1) Turns from finger tight (T.F.F.T)
2) Only for versions with “nipple-union-nipple” neck tube
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