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  1. gaalfred

    constant flow variable speed pump for heat exchanger

    Thanks guys, I found a performance curve for my pump. As far as I can tell, Thomsen doesn't publish full-range charts and I have never seen a chart for the Boumatic milk pump that is often used in daries. This one has a set of head vs flow curves for different sized impellers. I can convert...
  2. gaalfred

    constant flow variable speed pump for heat exchanger

    Also...to LittleInch, you are correct that it takes 6 1/2 hours to fill the truck. The large dairies have dispensed with the bulk milk tank with cooling capability and have gone to direct-load into trucks. The trucking company backs the tanker up to a hole with a foam seal around it in the...
  3. gaalfred

    constant flow variable speed pump for heat exchanger

    I need to respond to a couple of your comments, guys: So...Artisi, would you say that accurate control of a morphine pump in a hospital is "too complicated and expensive" because it is a 1/400th horsepower pump? What does the size of the pump have to do with the accuracy or value of the...
  4. gaalfred

    constant flow variable speed pump for heat exchanger

    Thanks to everyone, especially LittleInch, for answering. I think I see what to do, but want to post a response to you all to see if I understand what you have been saying. First, a little more clarification as to my installation. I left out some details earlier because I did not think they...
  5. gaalfred

    constant flow variable speed pump for heat exchanger

    Hello guys, I have searched high and low for clues to my problem and can't seem to get help. I have a centrifugal pump controlled by a VFD. The pump transfers milk from one tank to another through a milk-to-water and milk-to-glycol heat exchanger. The liquid levels in the two tanks are...

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