Nuts tightening specifications

PartModelTorque couple and tolerance
(Nm)
Valve nutVoce d. t. All 3 ± 1
Screw M6Intervarem - Solarvarem 5-8-12 l
Plusvarem 8 l		5 -0 +2
6 -0 +2
Screw M8Voce d. t. All from 19 to 100 l (No Plusvarem)
Plusvarem da 19 a 100 l
12 -0 +2
14 -0 +2
Screw M12Voce d. t. All from 150 to 400 l (No Plusvarem)22 -0 +2
Nut M12Voce d. t. All from 500 to 2000 l
Plusvarem 200-300 l
30 -0 +2
Nut 1/2" Per attacco SuperioreTop flange models 100-200 l 40 -0 +2
Nut 1/2" Per attacco SuperioreTop flange models 500-2000 l 45 -0 +2

Hand tightening must be done every other nut. Nuts must be tightened with a calibrated torque wrench.