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  1. kkribs

    Gorman-Rupp S8D1-E275 in Series?

    Artisi, thanks! Boiling liquid is at the vapor pressure, so I just think about it that way. Probably isn't correct. Cavitation is when it goes from vapor, back into liquid. It carries a huge amount of spot forces on the impeller. There is suction cavitation and discharge cavitation. Different...
  2. kkribs

    Gorman-Rupp S8D1-E275 in Series?

    Thanks for the tips Steve! That is the plan. A ValMatic discharge check valve on the second staged pump. At that lift, casing pressure ratings do become important. Not to mention damage from hammer, like you mentioned. In this case, I will not be getting hammered... perhaps later. The PAH10...
  3. kkribs

    Gorman-Rupp S8D1-E275 in Series?

    FYI, we're going with a sub at the bottom (turns out they already have a Flygt sub in place for the low pump), and a centrifugal skid-based GR Prime-Aire+ series pump at 100' elevation. at 200' elevation like the engineer designed, there isn't enough suction pressure to feed pump 2. At 100'...
  4. kkribs

    Gorman-Rupp S8D1-E275 in Series?

    Thanks guys! I'm pretty comfortable with doing all of the system analysis and system curves, etc. I have created a system curve. My program is pretty sweet, haha! The question is really asking if anyone has run them in series before. I don't expect anyone has. The chances are very low, but I...
  5. kkribs

    Gorman-Rupp S8D1-E275 in Series?

    Just posted this in another forum. I think this is the right one... I'd like to ask if anyone here has staged a Gorman-Rupp S-Series S8D1-E275 in series? We don't recommend it here in Canada and I'm wondering if anyone has tried it and the result. We have an open pit mine, lifting a total of...

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