Would this creation a vacuum suction?

Discussion in 'The Projects Forum' started by stanman11, Oct 12, 2011.

  1. stanman11

    Thread Starter Member

    Nov 23, 2010
    230
    4
    I'm trying to achieve a vacuum by sending air through the green tube, (in to out) sucking in air from the in/out blue tube. pulling the piston back to the end

    Would this T valve work?

    [​IMG]
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Are you trying to create a sort of Venturi effect?
    http://en.wikipedia.org/wiki/Venturi_effect
    Venturis work well for low pressures, but you'd need a lot of airflow to drop the pressure very much.

    And where does a piston fit into this? I don't see anything resembling a piston?
     
  3. stanman11

    Thread Starter Member

    Nov 23, 2010
    230
    4
    I guess a venturi is exactly what im trying to do.
    The piston would be attached at the in/out port
     
  4. #12

    Expert

    Nov 30, 2010
    16,298
    6,809
    It's entirely possible, but the shape of the tubes affects the results. I have one of these that I bought for making a suction filter from tap water flow. I believe you need a nozzel so the air flow is introduced at smaller diameter than the tube it is blowing past. A tiny bit of googling would probably clear up this point.
     
  5. stanman11

    Thread Starter Member

    Nov 23, 2010
    230
    4
    would this help increase the suction?

    [​IMG]
     
  6. #12

    Expert

    Nov 30, 2010
    16,298
    6,809
    I think the injector tube is too long. Try making it adjustable! and get rid of the interfering shape on the end of the air exit tube.
     
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