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Recent content by Charlesi

  1. Charlesi

    Entrained Air / Froth Pumping

    Hi Gents, Does anyone have expereince with entrained air / froth pumping. I have a pump (centrifugal) that is seeing alot or air and is surging. The fluid is quite unique, it is about 55% solids and has alot of entrained air and froth in it. Does anyone know of a practicle way to determine...
  2. Charlesi

    Anyone experienced with a Cage Paktor

    Does anyone out there have any experince with a cage paktor ore crusher?
  3. Charlesi

    Pump surging

    Hi gents, I have a problem relating to two pumps (both centrifugal). Both pumps pump the same distance have the same head requirments (on paper) and all have the same parts. Only one pump is ever running at a time. The problem is that when one pump is running all is well. When we change to...
  4. Charlesi

    Physical Properties Sea Water

    Have you tried the CRC hand book this has helped me in the past. Try the Handbook of Aqueous Solubility Data or the CRC Handbook of Chemistry and Physics Hope this helps
  5. Charlesi

    Cavitation problems in a sump pump

    I guess my main question was that if a pump in saline solution is cavitating violently enough could it erode an epoxy cover. I think what is happening is that once the plastic erodes from the cavitation and there is a little metal exposed to the solution the saline solution vapourises from...
  6. Charlesi

    Cavitation problems in a sump pump

    Hi guys I have a sump pump that is probably experincing cavitation. I say probably because the impeller is coated in a plastic cover (some type of hard epoxy???) and is showing signs of wear. Im not familure with the mechanics of cavitaion but is it possible that a plastic covered impeller...
  7. Charlesi

    Shaft Design

    This may seem like a simple problem but is causing me some grief. Can anyone explain the modes of stress experienced by a shaft under bending and torque. The easy ones are normal bending stress and torsional shear stress. What about direct shear stress and transverse shear stress? From what...
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