solenoid valve?

Discussion in 'The Projects Forum' started by Bigcountry, Aug 28, 2010.

  1. Bigcountry

    Thread Starter Active Member

    Jul 4, 2008
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  2. mik3

    Senior Member

    Feb 4, 2008
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    It would be better to have a low voltage (12 or 24 V) valve as not to put anyone in danger in case of failure.

    Where the valve is going to be put?
     
  3. Bigcountry

    Thread Starter Active Member

    Jul 4, 2008
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    The valve is going to be used in a water line. I need to turn it on when it reaches a certain temperature.

    I was thinking that the A419 runs off of 120AC but when I look up the specs didn't say how the the output is for it.

    That is why I just assumed 120 VAC.
     
  4. mik3

    Senior Member

    Feb 4, 2008
    4,846
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    It would be safer to use a low voltage valve unless you don't want to use a transformer.
     
  5. GetDeviceInfo

    Senior Member

    Jun 7, 2009
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    The document you linked to specifies the contact rating for both high and low voltage units.
     
  6. Bigcountry

    Thread Starter Active Member

    Jul 4, 2008
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    The one I have is the 120 VAC model. Now the question I have to ask is can I use the 24 VDC one ?
     
  7. marshallf3

    Well-Known Member

    Jul 26, 2010
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    All three SPDT relay contacts of the A419 are open - not connected to anything - so you can use them to switch any voltage you like. I like 24 VAC as I can get those step down transformers cheap from heat/air supply places. Another advantage to running low voltage is you don't have to worry about NEC regs on the wire to the valve, 24 VAC is considered to be low voltage.

    You do of course have to follow code on the input side if you choose the 120 VAC powered model, I just put three wire line cords on mine and plug them in. They do have a 1/2" conduit knockout on the bottom so I just use the proper electrical connector to secure the power source cord I'm running into it.
     
    Last edited: Aug 28, 2010
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