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  • Results 1 to 9 of 9

    Thread: Ultra efficient high flow pumps

    1. #1
      pondfishguy is offline Senior Member
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      Ultra efficient high flow pumps

      Ran across these when browsing for a pump. I've never seen anything this efficient at such a low price. Hopefully they'll be more available stateside soon. Would be great for transfer from RDF to Shower.
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    2. #2
      Charmai101 is offline Member
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      I don't like submersible pumps, but I like the Jebao band. I skeptically bought its stainless steel UV, but it works flawlessly, and is at a much lower price than most other brands.

    3. #3
      danbo is offline Senior Member
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      Wow...looks interesting. LP-16000 here in Thailand at 65$, LP-22000 at 68$. I have two submersible Tsrumi submersible pumps.....flawless for about 4 years... I like the no/reduced noise factor with submersible pumps. These Jebao pumps could probably pay for themselves in 6-12 months.... Only technical issue may be the outlet diameter. Looks like nearly 4". My piping is 2". Maybe delivering into circa 15m of 2" piping the head will go way up and achievable flow way down? Will look into this further. Thanks for the post!

      Dan
      Last edited by danbo; 08-10-2020 at 12:52 PM.

    4. #4
      batman is offline Senior Member
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      Most likely another Chinese pump with vastly over inflated testing numbers. Looks like an axial pump that's probably very efficient at 1/2 to 1 meter and less. The head numbers posted are not realistic. In the past the Chinese axial flow pumps haven't been durable.
      The real Batman wears polyester! Don't be fooled by the plastic imposter.

    5. #5
      coolwon is offline Senior Member
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      Just a comparison

      80 Liter air pump +- 80 watts

      140 liter air pump +- 140 watts

      LP16000 16,000 liters /hour 40 watts.

      Garfield
      Last edited by coolwon; 08-11-2020 at 02:22 PM.
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    6. #6
      danbo is offline Senior Member
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      Checking the numbers. Picking the LP35000 rated at 100W. Looking at the pump curves, say at 2m head, the LP35000 would be delivering around 17,500 l/hr or 0.00486m3/sec. Output power of a pump (in Watts) = flowrate (m3/sec) x pressure (pascals). 2m head = 19612Pa. Thus, output power = 0.00486 x 19612 = 95.31 Watts. So, yes an efficient pump at 100W input giving 95.31% efficiency....but not a totally unreasonable number. The problem will be the dynamic head/pressure drop once downstream piping is added. Back to the drawing board.
      Last edited by danbo; 08-11-2020 at 08:43 AM.

    7. #7
      danbo is offline Senior Member
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      Quote Originally Posted by coolwon View Post
      Just a comparison

      LP16000 16,000 liters /hour 40 watts at 2.8 m head

      Garfield
      You don't get 16,000l/hr at 2.8m head. You get 16,000l/hr at zero head, or 2.8m head at zero flow. The numbers are just the extremes of the pump curve....actual performance will always be somewhere in-between...

      Dan

    8. #8
      batman is offline Senior Member
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      Quote Originally Posted by danbo View Post
      Checking the numbers. Picking the LP35000 rated at 100W. Looking at the pump curves, say at 2m head, the LP35000 would be delivering around 17,500 l/hr or 0.00486m3/sec. Output power of a pump (in Watts) = flowrate (m3/sec) x pressure (pascals). 2m head = 19612Pa. Thus, output power = 0.00486 x 19612 = 95.31 Watts. So, yes an efficient pump at 100W input giving 95.31% efficiency....but not a totally unreasonable number. The problem will be the dynamic head/pressure drop once downstream piping is added. Back to the drawing board.
      You don't know BS multiplier to use for performance predicting these pumps. It's unrealistic to use the chart data. Only way to know is to test.

      This type of pump shines on 100% gravity filtration with pump head pressures less than 6 inches.
      Last edited by batman; 08-11-2020 at 03:22 PM.
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    9. #9
      ysrgrathe is offline Member
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      I have a different model Jebao (dcp-20000). At minimum flow I get 850gph (real, not nominal) at 29W. It's running a small shower so the head is just a few feet.

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