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  • Users: MatAI
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  1. MatAI

    Parallel Pump Operation and Cavitation

    In explaining the above, we've concluded the problem is cavitation due to problems evolving from the elimination of the recirculation line years ago, which was a poor design, no pressure or flow devices and no check valves. Although the pumps are supposedly the same manufacturer, design, flow...
  2. MatAI

    Recirculation Piping to avoid cavitation in parallel pump operation

    In explaining the above, we've more or less concluded the problem is cavitation due to problems evolving from NO recircualtion of any of the three pump discharges. Although the pumps are supposedly the same manufacturer, design, flow, discharge, etc., the strongest pump rules and the other pump...
  3. MatAI

    Corrosion on Flange Bolt

    If you have electrical continuity between two pieces of metal and they are in a corrosive environment (an electrolyte is present), the metals will corrode in accordance with the difference in their potentials. Believe it or not if you take a new carbon steel bolt and attached it to an older...
  4. MatAI

    Corrosion on Flange Bolt

    If you check the Galvanic Series Chart, carbon steel is anodic to stainless steel, and it, the carbon steel, will experience accelerated corrosion dependent on how the surrounding environment supports corrosion. To stop the corrosion, electrically isolate the carbon steel from the stainless...
  5. MatAI

    Recirculation Piping to avoid cavitation in parallel pump operation

    We have three boiler feed pumps operating in parallel that discharge to a common header. The original pumps were installed in 1970, and water demand by the boiler requires two pumps to operate simultaneously, which appears to present a problem. The #2 Pump was replaced within the last year due...
  6. MatAI

    Parallel Pump Operation and Cavitation

    We have three boiler feed pumps operating in parallel and suspect cavitation in the #1 & #3 Pumps. The pumps supply water to a boiler, and 90% of the time two pumps must operate to satisfied the steam demand. The original pumps were installed in 1970, and the #2 pump was replace last year due...

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