Reason for centrifugal pump not taking suction?

There may be various reasons that centrifugal pump is not taking suction, the following are the some of the reasons:
  • check valves are open.
  • suction line have cracks/ leakage,
  • priming check.
  • check for ingress of air.
  • suction line joints
  • wear ring clearance excessive.
  • impeller securing arrangement detached.

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