1、 Recommended height for eccentric celestial circles and places
Conventional scenario: The eccentric celestial circle area matched with the industrial fan mouth is recommended to have a conventional height of 350mm, which is suitable for the airflow steering requirements of most ventilation systems and reduces local resistance.
Special eccentricity scenario: If the eccentricity is ≥ 300mm, the height should be appropriately increased to 400-500mm to ensure smooth airflow turning and avoid additional wind resistance caused by sharp turns.
2、 Supporting trial operation specifications
Check before trial operation
Confirm that the eccentric celestial circle is connected to the inlet and outlet of the fan using a soft joint, the flange bolts are tightened evenly, the sealing gasket is not misaligned, and there are no obvious air leakage gaps.
Manually rotate the fan impeller for ≥ 3 turns, confirm that there is no jamming or abnormal noise, and that the clearance between the blades and the casing meets the requirements of the equipment technical documents.
Close the inlet and outlet air valves, check the power phase sequence, and jog the motor to confirm that the impeller direction is consistent with the marked direction.
Formal trial operation requirements
Gradually open the inlet and outlet air valves, adjust them to the rated working condition, check that there is no abnormal vibration or air leakage in the eccentric celestial circle area, and that the airflow is smooth without obvious noise.
After the trial operation is completed, check that the shock absorption foundation is not displaced or damaged, keep a good operation record, and confirm that the overall system is running stably.
