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  • Users: dianad
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  1. dianad

    Aluminium vs Galvanized steel

    Thank you alll
  2. dianad

    Aluminium vs Galvanized steel

    The only data that i have is the one i gave. I haven't specifications other than the aluminium: AlMgSi.... Thanks
  3. dianad

    Aluminium vs Galvanized steel

    strider6, Thanks for the reply and for all the references! But, can you give me a straight answer for now? Thanks!
  4. dianad

    Aluminium vs Galvanized steel

    Hi, I have a doubt related to PV pannels structures, to be installed near the sea. I want to know witch material is more resistant to corrosive environment: aluminium or galvanized steel? Is there any quick reference or a technical document, where i can find this and more about coatings in...
  5. dianad

    Series pump intsallation

    Dear Artsi, No, this is not related to that post. This is why i've created a new one. I know that this solution applied for the other case was a stupid solution, because the problem could stay the same or become even worst and cause problems... Thanks anyway! Dear whoowho, The pump is not...
  6. dianad

    Series pump intsallation

    The problem is that the pumps avaiable in the market are to large to fit in the avaiable area...they are larger...
  7. dianad

    Series pump intsallation

    hi, I have an installation where the pumps avaiable in the market for that purpouse do not reach the head that i need to overcome the circuit pressure loss. Therefore, i wonder if i could install another pump after this 1st one. Do you think that i need to leave some space between them or even...
  8. dianad

    Circuit pressure

    Thank you all for the replies! I'm more concerned about the air. Tha guy how made the installation used a filling pump witch has the possibility to remove the air durin the system filling. So, for this reason, he did not install an air purger at the top of the circuit. I wonder if some air...
  9. dianad

    Circuit pressure

    I everyone. It can not be rats or gloves, etc, because is a 15mm pipe. The pump is installed correctly. I've attached a scheme. I'm quite lost. The 1st think that i thought is to change the pump, but i'm affraid that may not be this the reason...
  10. dianad

    Circuit pressure

    BigInch, It's quite complicate to draw now a schem, but i understand what is your point. You want to confirm if my calculations were correct. Let's assume yes and if we don't find a reasonable reason, then we assume that was my failure. Thanks
  11. dianad

    Circuit pressure

    MikeHalloran, In the top of the circuit. But now it is closed, because the circuit was filled and removed all the air. BigInch Ok. That was my cnclusion. But what is the possible reason? Thank you both!
  12. dianad

    Circuit pressure

    Hi, I'm facing the following problem: in the project, i've calculated the pressure drop along a closed circuit. The calculations gave me aprox. 3,5 mH2O of pressure drop. This was calculated for a optimal flow of 240 lt/h. After the installation was made, the max flow that the pump was able to...
  13. dianad

    Check valve head loss

    Thanks BigInch, Now i understood perfectly what you said! One last thing: isn't this elevation loss consideration included in the total height elevation between the lower and upper point of the pipe, used to calculate also the pump head needed? Thanks once more
  14. dianad

    Check valve head loss

    Thanks for the replies. I'm a bit confused about the answers. Normally i use the formula that i use with any local loss, wich includes that Cv factor that BingInch mentioned. My doubt, and that was yet clarified, is related to this factor. Does it change if we consider vertical or horizontal...
  15. dianad

    Check valve head loss

    So, how can i calculate the pressure loss in a check valve installed vertically?
  16. dianad

    Check valve head loss

    Hi, I mean head loss (pressure loss) in the check valve. I ask this, because my idea is that if we have a check valve vertically, it has an upper resistance due to the water weight, that hasn't when is installed horizontally. Am i correct?
  17. dianad

    Check valve head loss

    Hi, Can anyone confirm this to me please. Does a check valve has a different had loss value, if it's installed in a vertical or horizontal pipe? Thanks
  18. dianad

    Hydrostatics and Stevin theorem

    Thanks BigInck ;)
  19. dianad

    Hydrostatics and Stevin theorem

    Sorry to all because of my question. It seems that created a bad mood to everyone, but it wasn't my intention. Sorry and thank you all for your ideas.
  20. dianad

    Hydrostatics and Stevin theorem

    Hi everyone, This was my initial intention. To generate some discution about some issues that we've learneg a long time, and we think that they aren't useful until we have a problem like this in hands. What was said here, shows my doubts and why i've posted this here. I've stuied also...

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