Recent content by Red Dog

  1. R

    Calculating output from an air displacement pump

    My apologies - I performed a typo in the opening line of my post. My pump is an air displacement type, not air lift. The operational principle is different to air lift.
  2. R

    Calculating output from an air displacement pump

    Can anyone help me with a formula to calculate the output of an airlift pump for a certain head, pipe diameter and pipe length? An air lift pump works on the principle of a fill/empty cycle (so many seconds to fill and so many to empty). I can calculate the pressure required for a particular...
  3. R

    Calculating Water Flow: Time to Fill Canister

    I have been trying to work out a formula to calculate how long it might take to fill a container of a known capacity in various depths of fresh water. The container would have a foot valve for entry and a pipe extending above the surface for air displacement. Tests at 1metre deep have given...
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