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Thread: Aquatec 8800 series Flow vs Pressure question

  1. #1
    Join Date
    Mar 2011
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    Genesee Township, Michigan
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    Default Aquatec 8800 series Flow vs Pressure question

    I am using an Aquatec 8852 diaphragm pump for pumping from holding tanks to buckets and some vacuum work. I was looking at the specs sheet at http://www.freshwatersystems.com/spe...Pump_24Vac.pdf and noticed that the flow increases as the pressure goes down. Opposite seems of a hose attached to the house water.

    Since I know nothing about pumps, or fluid hydraulics for that matter, I was wondering if some could explain how this can be?

    I assume this might mean if we want a higher flow to fill the buckets faster, we turn down the pressure. Would a higher flow/lower pressure also equal more vacuum?

    Thanks in advance for taking the time to answer.

  2. #2
    Join Date
    Jan 2006
    Location
    Oneida NY
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    11,675

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    That is correct. When the pump needs to generate more pressure to make the liquid move it looses GPM. When it is just open discharge (no restriction) it moves more GPM. In this case, you need to think of the pressure as a restriction to flow.
    Dave Klish, I recently bought a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
    Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
    Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
    After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.

  3. #3
    Join Date
    Mar 2011
    Location
    NH
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    It is just like a garden hose. When you put your thumb over the end of it the pressure will go up (it shoots out farther) but the flow (volume moved in 1 min) will go down.
    30 x 8 Leader
    Home made AOF / AUF
    Hood / pre heater
    Indiana LR gas powered vac
    750 taps @ 25"

  4. #4
    Join Date
    Mar 2011
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    Genesee Township, Michigan
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    Default

    Thanks for the examples, it is clearer now.

  5. #5
    Join Date
    Mar 2005
    Location
    northwest pa
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    133

    Default

    i have the same pump (8852) sitting on the shelf. how did it work for you?
    3 taps this year... 2 on tubing 1 bucket

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