Need selinoid or something to open water valve for 10-30 seconds then close it.

Discussion in 'General Electronics Chat' started by maxpower097, May 22, 2012.

  1. maxpower097

    Thread Starter Well-Known Member

    Feb 20, 2009
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    So heres my project. I need to have a 25 gallon bottle of liquid, non corrosive, non flameable and trigger it to release liquid 10-30 seconds then close it back again. I'm thinking some sort of selenoid and a pvc tube. Or motor and valve. I don't have much experience in this field so if you can think of some ideas of what I can use it would be appreciative.
    Thanks
     
  2. strantor

    AAC Fanatic!

    Oct 3, 2010
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    I've never used one of these cheepo things, but it would probably work for you. I'm just assuming you don't want to pay hundreds of dollars.
     
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  3. #12

    Expert

    Nov 30, 2010
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    Reminds me of a fill valve for a dishwasher or an ice maker (inside a refrigerator) but more appropriate for this job. Good choice...or you could steal a fill valve off a dead appliance and see if it works. (They will be designed for 120 VAC in USA.)
     
  4. coldpenguin

    Active Member

    Apr 18, 2010
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    I tried one of those for a similat idea, filling a water-can from a water butt.
    2 problems, 1 doesn't work well in low pressure situations (i.e. gravity fed)
    wasn't waterproof, and corroded away
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    It would be possible to pressurize a bottle of liquid pretty easily for high pressure. The 115VAC is a different problem. Making something waterproof is gravy.

    A simple motor controlling a ball valve would also be practical.
     
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  6. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    they sell plastic solenoid valves for water at any home depot/lowes/hardware store for sprinkler use.. Typically 24V operation and around $12..
    If manual operation is all thats required (ie press a button and it opens then closes automatically after the set time period) just get a delay on make timer relay,the valve, a 24V wall wart, and a button and call it a day.
     
  7. maxpower097

    Thread Starter Well-Known Member

    Feb 20, 2009
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    The water tank will be pressurized.... :) I can make it water proof. This will need to run in the field on a battery and microcontroller so mains are out of the question. I was thinking of the ball valve and motor too. I already have some 12v low RPM motors.
     
  8. @lpha

    Member

    Feb 21, 2012
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    You can try the pinch electrovanne like this
    http://pdf.directindustry.fr/pdf/sirai/electrovannes-pinch/7131-6910-_11.html
    No need liquid pressure, and there s no direct contact between liquid and any parts of the electrovanne.

    I made this type of electrovanne with a 4mm screw and bolt and DC motor
    The axis of motor is fixed to the 4mm screw, and when i applied a 12V DC the bolt slide (up or down depending of the applied current sens) and a small PCB tongue pinch a 3mm silicon pipe.
     
  9. GetDeviceInfo

    Senior Member

    Jun 7, 2009
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    x2 - irrigation valve
     
  10. maxpower097

    Thread Starter Well-Known Member

    Feb 20, 2009
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    Thanks I'll look into it.
     
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