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pressure required?

  • 07-04-2012 9:02pm
    #1
    grousedogtom
    Registered Users, Registered Users 2 Posts: 463 ✭✭


    HI all
    I am a sizing a suitable submersible pump to go about 90 meters in a bored well which it will pump to a 300 lt pressure vessel on top of the well.From there the water needs to climb to an elevation of about 75 meters at its highest point, my question is am i right in saying i will need a pump with a head of at least 165 meters = 235 psi pressure to achieve this if the water in the well dropped down near the pump,my confusion is 235 psi is over 16 bar which seems very excessive,am i calculating something wrong?


Comments

  • #2
    Pete67
    Registered Users, Registered Users 2 Posts: 1,257 ✭✭✭Pete67


    No, your calculations are spot on. The pump would also need to deliver a reasonable flow at that pressure.

    You could also pump in stages - a submersible pump to raise the water to the ground level pressure vessel, and a second pump to pump from there to the location at 75m elevation.


  • #3
    grousedogtom
    Registered Users, Registered Users 2 Posts: 463 ✭✭grousedogtom


    Pete67 wrote: »
    No, your calculations are spot on. The pump would also need to deliver a reasonable flow at that pressure.

    You could also pump in stages - a submersible pump to raise the water to the ground level pressure vessel, and a second pump to pump from there to the at 75m elevation.

    Yes flow is also important here, there's a 2 inch pipe in place, i will find out volume required and work pumps from there, the second pump seems to be the best option maybe a vertical multi stage in the pumohouse, also are pressure vessels rated to 10 bar and what kind of pipe would take this pressure, the pipe I usually use is the blue 12 bar mdpe. Thanks again


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