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  1. bimr

    Design of a pre-filtration internallly fed drum filter

    Take a look at these: https://www.huber-se.com/case-studies/detail/the-huber-rotamat-family-proven-technology-for-large-projects/...
  2. bimr

    Need help in selection of EDI system

    Yes, it will work fine. EDI works as a polishing step. Electrodeionization (EDI) is a chemical-free, electrically-driven water treatment technology used as a polishing step to remove ionized and ionizable species from water, often after reverse osmosis (RO), to produce ultrapure water.
  3. bimr

    Need help in selection of EDI system

    The system that you are buying is so small that it can be purchased off the shelf: https://www.dplvalves.com/edi-electrodeionization-water-treatment-systems-3053840.html
  4. bimr

    Air valve on falling main

    Darcy-Weisbach equation
  5. bimr

    Air valve on falling main

    If you have the air valve, you run the risk of a sewage spill at the air valve. Sewage tends to foul air release valves. There is not much value in having the air valve. Your pipe is only 150 mm, so the risk of pipe collapse is very small. The possibility of siphonage is low since there is no...
  6. bimr

    Maximum friction losses are 5% in pipes. Who said it first?

    There isn't a universally mandated rule of thumb "5%" rule for maximum friction loss Reasonable water pipe velocities depend on the application. There is no correct velocity for all applications. Here is a general guideline. Reasonable Velocities for the Flow of Water through Pipe: Boiler...
  7. bimr

    Need help in design of purified water generation system

    Asisraja D, Your SOP provides the outline of what you require after the RO treatment. The SOP shows a recirculation loop with UV treatment and filters. What is not described is the piping system. For pharmaceutical water piping systems, prioritize materials like PVDF and heat-based joints to...
  8. bimr

    Water supply system steep vs flat curve

    Your pressure is relatively high. Consider adding some type of pressure relief so that you don't over-pressurize the piping.
  9. bimr

    Need help in design of purified water generation system

    The scale of equipment that you need is small and is usually supplied by a package water treatment plant. As the others has posted, you need to specify the quality of the purified water that you require. Once you have determined the specified water quality, you can contact a firm like the...
  10. bimr

    Minimum horizontal distance between water/domestic lateral lines for townhouse project in California

    The minimum distance between water service line (wet trench) and the 2' wide trench (dry trench) (telephone, catv and elec) may vary from a minimum of 12-inches to 5'. You will have to get the answer from your local building official. https://www.karuk.us/images/JointUtilityTrench.pdf
  11. bimr

    Piping for N2

    What is the application and temperature? Have you looked here: https://www.eng-tips.com/threads/nitrogen-piping.27735/
  12. bimr

    Minimum horizontal distance between water/domestic lateral lines for townhouse project in California

    Post No.3 3 also states: "This is referring to the distance between sewer and other utility pipes, I am trying to figure the spacing between 1" water service lines or if they can be placed next to each other or stacked."
  13. bimr

    Minimum horizontal distance between water/domestic lateral lines for townhouse project in California

    There are specific requirements almost everyone for this. If the inspector finds improper installation, the Contractor will have to correct it. In California, the minimum horizontal distance between a water line (domestic lateral) and a sewer line running parallel to it is typically 10 feet...
  14. bimr

    Feedback about NK and NKG grundfos pumps in Sea Water Desalination

    The NKG pumps are just ordinary transfer pumps. If you procure these pumps with the correct materials of construction, then you shouldn't have any issues.
  15. bimr

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

    Suggest you review one of the grinder pump systems before you respond. The poster is describing a grinder pump system, not an overhead sewer. These grinder pump systems consist of a 1.5" lateral from the residence that is connected to a 2-3" diameter manifold that conveys the sewage away. The...
  16. bimr

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

    Not sure what you have going on as you haven't presented the equipment details. Most of these systems have a grinder pump with 85 psi discharge pressure. You should have a check valve adjacent to the grinder pump that prevents the backflow. If you have a leak in the lateral, it would appear...
  17. bimr

    Sewer Pump Station underperforming at Start Up

    I thought the pumps were in parallel. I will look at it again.
  18. bimr

    Sewer Pump Station underperforming at Start Up

    If you look at the horsepower calculator on this site: https://www.engineeringtoolbox.com/pumps-power-d_505.html If you are using a standard no-clog centrifugal pump on this application, you pump motor is likely undersized as the pump efficiency may be as low as 40%.
  19. bimr

    Salt Dosage vs. Capacity relationship

    Ed says: “When you regen the resin reaches an equilibrium with the brine.” That is an incorrect statement and will confuse the poster more than he already is. When salt is applied, the high stoichiometric salt ratio drives the reversible chemical reaction one way, and then the chemical reaction...

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