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Need some help on air pressure through a manifold and optimal leak/pressure rate

  1. Sep 18, 2012 #1
    I have a small pump system for an aquarium, and have decided to build a small manifold. The total volume of the manifold and the tubing is 2.9828 cu inches. Here is my pump specs:

    Inflation time < 8s (from 0-200 mmHg in a 100cc tank)
    Air flow > 70mL/min
    Max pressure > 360mmHg
    Leakage max 36mmHg/15sec from 300mmHg at 70cc tank
    Pump time - 7sec on / 7sec off

    From the pump is a 3/16" x 12" tube (volume = .3311 cubic inches) which attaches to a small cylindrical manifold (1"x3" - volume = 2.3571 cubic inches) that has two air rails (each air rail (1/4" x 3" -volume = .2946 cubic inches). Total volume should be 2.9828 cubic inches.

    I was hoping to see if someone could figure out how big of an orifice I would need on each rail for maximum pressure, within the 7 seconds on, 7 seconds off (basically optimal orifice pressure and size where manifold drops stays at a constant positive pressure at the end of the 7 second off phase wherein the 7 seconds on phase starts to pump and build pressure. Any help on this would be appreciated. Thanks.
    Last edited: Sep 18, 2012
  2. jcsd
  3. Sep 19, 2012 #2
    Anyone? Bump...
  4. Sep 20, 2012 #3
    No one? Thats odd. I guess than, I will just have to experiment with different orifice sizes to get the best result, was trying to avoid this and wanted to see if a mathematical solution existed for this problem.
  5. Oct 12, 2012 #4
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