help - Why valves should be lower than the top of the tank?

Discussion in 'Boat Design' started by m.idrees075, Jul 21, 2016.

  1. m.idrees075
    Joined: May 2015
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    m.idrees075 Junior Member

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    Why the valves should be lower than the top of the tank in this case plz:)?
     
  2. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    Makes gravity feed possible.

    Or if in bottom draining water easier , oil floats on water.
     
  3. SamSam
    Joined: Feb 2005
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    Location: Coastal Georgia

    SamSam Senior Member

    It doesn't say they should be below the top of the tank, it says if they are below the top, you need an easily accessible operable valve on the outside. I'm thinking that's for if a line breaks, all the lube oil won't drain out or be siphoned out.
     
  4. m.idrees075
    Joined: May 2015
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    m.idrees075 Junior Member

    Mr. Sam thanks alot for your reply
    You are right abuot correction my understanding the status☺
    But I'm sorry because your idea it's not clear for me
     
  5. m.idrees075
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    m.idrees075 Junior Member

    Mr. Fred thanks alot
     

  6. SamSam
    Joined: Feb 2005
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    SamSam Senior Member

    I don't know the 'status' either, but I'm guessing LO is lubricating oil, ME is main engine, ER is engine room. So I'm guessing a quick closing valve is to be located outside the engine room so in case it is not possible to enter the engine room because of a fire, the lube tank outlet can be shut down from outside the engine room. If the lube tank outlet is below the tank top (such as at the bottom) and that line breaks or is burnt away, all the oil will drain out and feed the fire. With a shut off valve located outside the engine room, if you can't enter the engine room because of fire or something (toxic fumes) the valve can still be shut.

    That's just a guess so you might want to verify it somehow.
     
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