COMPARISON OF CENTRIFUGAL PUMPS TECHNOLOGIES

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On principle, a centrifugal pump pumps a liquid by forcing it through an impeller while giving it a rotating motion and thus an hydraulic power. A centrifugal pump hydraulic driven by a standard motor, must have at the end of the shaft a sealing system. Yet, 75% of the pumps’ failures are due to mechanical sealing.

 

A pumping system that does not have a dynamic sealing is thus very attractive for the users of dangerous, toxic, instable, expensive, radioactive… liquids. Amongst the totally leak proof pumps, the “canned motor” technology completes the “magnetic drive” technology. But the “canned motor” design presents crucial advantages in most applications allowing a higher level of security and reliability. It is the culmination of pumping systems research, and the safest solution allowing an absolute sealing, in accordance with the CE compliances regarding environmental pollution.

COMPARATIVE OF CENTRIFUGAL PUMPS

WITH MECHANICAL SEAL :

optimex comparison centrifugal pumps - mechanical seal
Centrifugal pumps with mechanical seal

75% of pump breakdowns are caused by mechanical sealing problems.

 

  • Health dangers
  • Risk of industrial accidents in case of hazardous fluid leak
  • High maintenance costs
  • Risk of industrial process disruptions

WITH CANNED MOTOR :

optimex - comparison centrifugal pumps - canned motor
Centrifugal pumps with canned motor

1) Security:

  • Totally hermetically sealed assembly (no dynamic seals)
  • With double containment in case of stator liner failure

2) Reliability:

  • Best MTBF (Mean Time Between Failure) of centrifugal pumps
  • Maximal limitation of wearing parts

3) Simplicity:

  • Assembly without alignment
  • Easiness of preventive maintenance operation

WITH MAGNETIC DRIVE :

optimex comparison centrifugal pumps - magnetic drive
Centrifugal pumps - magnetic drive
  • Can failure > immediate leaking to the atmosphere (simple containment)

  • Impeller blocked > external magnets continue to rotate > explosion risks

  • Temperature monitoring difficulties at the hottest spot (no access at the rear)

  • Alignement difficulties of the parts on baseplate > cause of rapid wear