Split Case Pump Cavitation - Trouble Shooting
Split Case Pump Cavitation - Trouble Shooting
(OP)
We have a split case pump in for repair and there is excessive cavitation damage to one side of the casing around the wear ring fit. The impeller vanes on both sides of the impeller have 1" diameter holes at suction. There is relatively no damage to the discharge portion of the casing nor the rest of the impeller. The suction line is 14" and this pump is directly at the end of a header system. I am wondering what would cause such devastating cavitation damage to only one side of a split case pump. I am sure there is more information I can offer although I would like to know your thoughts before going into excessive detail. I am guessing that excessive turbulance on one side of the case has something to do with it. Thanks for giving this some thought.





RE: Split Case Pump Cavitation - Trouble Shooting
Patricia Lougheed
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RE: Split Case Pump Cavitation - Trouble Shooting
RE: Split Case Pump Cavitation - Trouble Shooting
Your description of holes through the impeller vanes tends to fit better with suction problems, as Artisi noted. But, you may have more than one problem. Do the holes in the impeller vanes appear to be originating from the visible side of the vane, or the back side?
A picture would be very nice. A description of the case and impeller materials and the process fluid would be good, too.
Johnny Pellin