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Recent content by skgcog

  1. skgcog

    Radical HP spike at a particular speed

    Sorry, I wasn't clear on the HP spike. After removing the vortex breaker blocks and installing the spoiler bar, the HP spike at 31%-32% disappeared. We still had an oversized impeller to deal with, but at least we could begin to collect data to deal with it.
  2. skgcog

    Radical HP spike at a particular speed

    First of all, I would like to thank all who contributed and give you all an update. We opened the pump and found the impeller to be 830mm rather than the spec'd 750mm. Nothing else unusual except the vortex breaking blocks seemed to be excessively large. Upon removing them and replacing them...
  3. skgcog

    Radical HP spike at a particular speed

    Thank you for the kind reply TenPenny, 1) the tank has water in it. We are still trying to get the pump to run properly on water and have not put stock to it yet. 2) Unfortunately, during our haste, we have not determined at what speed it does begin to move water, but at 20% to 30% speed (12...
  4. skgcog

    Radical HP spike at a particular speed

    Also, just to help the process, we have already tried another motor. Also, running the pump dry with just seal water one for the packing it runs up to 100% speed in 5% increments and the amp draw tracks with speed nicely up to a full draw of only 100 amps. Nothing mechanical or drive related...
  5. skgcog

    Radical HP spike at a particular speed

    Hi everyone, We have a very strange phenomenon occurring here at our pulp mill on a new pump we have just installed. The pump is a Trashex 30 which is comparable to Voith's Contaminex CM30/31. The layout is such that it can be used to pump a batch pulper to a tank, or switched to recirc the...
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