Supplemental Assembly Information
76
TT
Twin-Screw Pump -
Installation, Operation, and Maintenance Manual
Recommended torqueing sequence for bolted joints
1. Always use a high-quality calibrated torque wrench
2.
Work in a “Criss-Cross” star pattern for circular joints
3. Work in a Spiral pattern for non-circular joints
4. Use the
Rule of 3
for tightening
5. The first pass of tightening should be to approximately 1/3
rd
of the final fastener torque
6. The second pass should be to 2/3
rd
of the final fastener torque
7. The third pass should be to 100% of the final faster torque
8. Make one final pass to verify all the fasteners have stabilized at the target torque.
