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Recent content by alienitmeca

  1. alienitmeca

    Level lowering of pump station

    Thanks every one for your replyes it was very helpful, Hears below a link to a website that elaborates cleary the calculation procedure for future references: Link
  2. alienitmeca

    Level lowering of pump station

    Thanks for your quick replyes, HMT in indeed a frech designation for the " total discharge head " Hears the situation: We have a pump with a BEP (1100 l/s ----> 123 m) demanded by the client (assuming that he did his topographic mesurments accurately for the discharge head "123 m"). Now the...
  3. alienitmeca

    Level lowering of pump station

    Hello, When designing a pump with a specific HMT (123 m), and we come across a client update (lowering the pump level ΔL=-1.6m), Suction tie-in point ( with Residual pressure Pr = 15 m minimum) and discharge point elevation are still intact. Do we need to update the pump spécification : HMT...
  4. alienitmeca

    Drinking Water Treatment Plant

    Thank you for your responses, In our project, we are opting to 3 coagulation chambers mounted in series, we still do not have reference to the size of the chamber, hears an example for 2 m3/s water treatment plant, Size of the chamber: H x L x l = 4.7 m x 4.9 m x 4.7 Then volume of the...
  5. alienitmeca

    Drinking Water Treatment Plant

    bmir, you said that "The size of the basins is determined during preliminary engineering design of the treatment plant based on the flow and raw water quality" I am going to consider my project as an example: -Turbidity of the raw water = 2000 TNU (high turbidity water) -flow rate needed is...
  6. alienitmeca

    Drinking Water Treatment Plant

    Thank you all for your replies, I believe my questions should have a troubleshooting aspect, therefore, I am going to ask about Coagulation: The main parameters in the design of a coagulation unit are as follows: - G (s-1): Velocity gradient - T (s): Retention Time of the mixture...
  7. alienitmeca

    Drinking Water Treatment Plant

    Hello everyone When desinging a water treatment plant, what are the main process methods used. I should mention that the plant is set to produce a regular flow of 1 cubic meter per second (Q = 1 m3/s) and it could go up to 1.25 m3/s Coagulation and flocculation are going to be used in the...
  8. alienitmeca

    Check valve with perforated disc

    Please find attached a sketch for the pumping station indicating flow direction, check valve position and arrangment of pumps piping and surge tanks, As it is indicated on the sketch, surge tanks are at the discharge line of the pumps. I hope this helps clarfying the situation...
  9. alienitmeca

    Check valve with perforated disc

    Hello, I am currently working on a water pumping station with an overall capacity of 2200 l/s (nearly 8000 m3/h), the latter is delivering water to a storage tank. The scope of the project includs installing surge tanks to protect the system from water hammer effects. According to the client...
  10. alienitmeca

    EXPANSION JOINT FOR DIESEL PUMP DISCHARGE LINE

    Thanks stookeyfpe for your reply... even though it has nothing to do with my inquiry, my problem is piping design related, vibration has to do with foundation design, which may explain your post. If you have piping related information I would really appreciate it
  11. alienitmeca

    EXPANSION JOINT FOR DIESEL PUMP DISCHARGE LINE

    Hello I am currently working on fire fighting project for an oil storage facility, I am designing the piping layout including all its components. Such systems are designed according to NFPA Standards, which state the use of emergency Diesel pumps, these pumps are known to generate a great deal...
  12. alienitmeca

    Check valve Position

    Thank you everyone for your responses, it's been quite an interesting discussion, very informative as well
  13. alienitmeca

    Check valve Position

    Hello, When designing your piping layout, one would certainly have to use a fair amount of valves of various types (check valves, gate valves, butterfly valves...) to choose one type over the other demand some thinkig along with good engineering skills and operating conditions, My question is...
  14. alienitmeca

    Valve selection for butumen storage facility

    Thanks dd1972 and georgeverghese , this has been truly helpful.
  15. alienitmeca

    Valve selection for butumen storage facility

    Thank you for your reply, could you give me more detais, how to choose this type of valves, is there a handbook or a standard to check ?
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