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  1. Hartley Kingon

    ***LOW PRESSURE SEWER INFORMATION DESPARATELY NEEDED***

    Just to add clarity, heres how it works in the order of flow of the waste: 1. There is a pump station on the property which is the owners responsibility. 2. There is a boundary kit at the properties boundary which is what separates the councils system responsibility from the homeowners...
  2. Hartley Kingon

    Pressure Sewer Pump Station Documentation – Australia

    Hello all, I’m currently doing some personal research into pressure sewer pump station design, specifically wanting to get a better understanding of the Australian requirements, guidelines, and best practices around this. I was wondering if anyone here might have any documentation, standards...
  3. Hartley Kingon

    Water supply system steep vs flat curve

    Simply go with this End Suction Centrifugal pump with a 217mm impeller and 7.5kW motor. Operate it on a VSD/VFD set to maintain 4bar. You would be getting about 50% efficiency.
  4. Hartley Kingon

    pump and motor

    You would need to ensure that the reduction in power is equal to the reduction in speed^3. So 5.5kW x (2875/2900)^3 = 5.36kW - So to operate at 2875 RPM, your motor must be be able to produce 5.36kW at that speed otherwise there will be too much strain on the motor. THe pump is unlikely to be...
  5. Hartley Kingon

    High/low alarm set point for seal plan 52

    They should have a 4-20mA output or 0-10v output which you will be able read using a compatible PCB.
  6. Hartley Kingon

    HDPE Access Cover FEA

    Thanks SWComposites, The business wanted to do this at as low a cost as possible 🙄 hence me trying to work this out. It sounds like it is beyond me, though. I'm going to tell them to contact someone who specialises in this before I waste too much of everyone's time! Thanks again SWComposites!
  7. Hartley Kingon

    HDPE Access Cover FEA

    Hello, I am a civil engineer, not a structural engineer; however, I need a custom access cover as part of a project. It must withstand 10kN to pass and is made of HDPE. I did a basic simulation, and it resulted in a maximum deformation of 5.63mm. I have no idea how to tell if this will be an...
  8. Hartley Kingon

    Jet Pump NPSHr Data

    Ok, thanks for your response LittleInch. That makes perfect sense. So would you say if cavitation was to occur it would be where the lower and higher velocity fluids combine just after the jet nozzle?
  9. Hartley Kingon

    Jet Pump NPSHr Data

    Thanks for your help, I may well be overthinking the problem. I don't have high experience with this type of pump and could not find any information regarding them cavitating at low NPSHa. The main point I wanted to clarify is why a manufacturer would not provide information on this and is...
  10. Hartley Kingon

    Jet Pump NPSHr Data

    https://files.engineering.com/getfile.aspx?folder=2a7e3825-0ade-415c-84ee-e3c4bb917b4c&file=Screenshot_2023-02-09_084753.jpg https://mechanicalboost.com/wp-content/uploads/2021/05/jet-pump-working.jpg See part 25
  11. Hartley Kingon

    Jet Pump NPSHr Data

    I'm sure cavitation can happen in any system, NPSH is not an issue for jet pumps that have the ejector down the well, however these models all have the ejector inbuilt. I want to install a jet pump with a flow rate of 90L/min @ 48m Head. The suction lift is 7.5m including friction and the max...
  12. Hartley Kingon

    Jet Pump NPSHr Data

    I have noticed multiple pump manufacturers do not provide NPSHr data for Jet Pumps. https://product-selection.grundfos.com/au/products/jet-pumps/jp/jp-4-47-99458783?tab=variant-curves&pumpsystemid=2027696325...
  13. Hartley Kingon

    Forrers 4L 10 TLC Pump Curve

    Ok, thanks for your help too. I will call them also.
  14. Hartley Kingon

    Forrers 4L 10 TLC Pump Curve

    Thanks Tugboat. The pump was installed in 1993 so they want to replace it. I will try Grundfos. Thanks for your response.
  15. Hartley Kingon

    Forrers 4L 10 TLC Pump Curve

    Hello All, I need a performance curve for a Forrers 4L 10 TLC. I cannot find it online, does anyone have this curve? Kind Regards, Hartley.

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