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6
Checking tightening torque prior to commissioning
Prior to commissioning, check that the
threaded connectors have the correct
torque.
Checking tightening torque prior to commissioning
User qualification, pre-commissioning checks: trained qualified
n
Ä Chapter 2.2 'User qualification' on page 8 .
personnel
Fig. 9: Permanent tightness: Check the tightening torque prior to
commissioning, in the sequence shown in Fig. 9 .
1.
Check the tightening torque of the screws 1 ... 8 prior to com‐
missioning. Tighten all screws to 5 Nm, in the sequence
shown in Fig. 9.
2.
We also recommend checking these threaded connectors for
correct torque at least once a year because the pump mate‐
rial yields (creeps) and the tightening torque is then reduced.
A2729
17
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