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...
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...
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.
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...
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!
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...
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?
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...
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
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...
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...
