Pump Cavitation


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Presentation I created on cavitation, this gives us a look at the damage caused by pump cavitation.

I need feed back Please I build presentations on content related to almost anything mechanical.

So if you take the time to view this your feedback would be appreciated.

This presentation does not provide the areas to look at to resolve the issue simply a visible way to identify it.

If you are seeing these signs you are losing money to a hidden and common problem that is induced and can be minimized or eliminated with corrective measures.

This presentation takes around 15 to 20 minutes if you study your topic you can stretch it out.
This presentation is for shop personnel operations or mechanical group I stayed away from vapor pressures and calculations on purpose.

This is for field trouble shooting next presentations will be about what a front line person may look at to reduce or stop this type of damage.

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Pump Cavitation

  1. 1. A reminder that safety is the most important thing to consider while performing our jobs.•We need to use the safest work practices we can and donot take shortcuts.•Follow lock out tag out procedures and make sure theequipment is De-energized.•Wear the proper personal protective equipment, follow theMSDS recommendations. “We as individuals are responsible for our safety” 12/6/2012 1
  2. 2. Cavatition Identifying A potentially serious problem.Presentation by: Oran Jackson, Mechanical SkillsTrainer.12/6/2012 2
  3. 3. The objective of this presentation is to demonstrate.What cavitation is?What kind of damage cavitation causes.What Problems arise from it ?12/6/2012 3
  4. 4. Cavitation is a common occurrencebut, is the least understood of allpumping problems. It can result inloss of production, equipmentdamage, and worst of all, Personnel Injury. 12/6/2012 4
  5. 5. What is Cavitation ?• The formation of and then Immediate Implosion of Vapor Bubbles within a liquid. 12/6/2012 5
  6. 6. Definition of Implosion. An explosion is a rapidThe opposite of explosion, increase in volume andimplosion concentrates release of energy in anmatter and energy. extreme manner. 12/6/2012 6
  7. 7. Cavitation in Action.12/6/2012 7
  8. 8. Two types of cavitation 1. Suction. 2. Recirculation.12/6/2012 8
  9. 9. Suction Cavitation - is caused by inadequate suction pressure. Pump Suction12/6/2012 9
  10. 10. Damage Caused by Suction Cavitation Damage to the impeller eye, vanes and face.12/6/2012 10
  11. 11. Recirculation Cavitation - is caused by low flow through thepump this occurs at suction or discharge of the pump. Pump Discharge Pump Suction 12/6/2012 11
  12. 12. Damage Caused by RecirculationCavitation. Damage to the outside of the impeller, on the outer periphery.12/6/2012 12
  13. 13. Now we have a balance problem with the rotating assembly.12/6/2012 13
  14. 14. When rotating components are out ofbalance. •The bearings will experience higher loading that will translate to premature failure. 12/6/2012 14
  15. 15. When rotating components are out ofbalance. •The mechanical seal faces can separate because of the induced vibration and shaft run out. •The seal faces can become damaged as the vibration causes the carbon to bounce against the hard face. 12/6/2012 15
  16. 16. Now we have a maintenance problem. 12/6/2012 16