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Solenoid Valve for gas

Discussion in 'Electronic Design' started by koma, Mar 19, 2007.

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  1. koma

    koma Guest

    Will a solenoid valve specified for "lubricated or non lubricated
    compressed air" at 0-8 bar work with for example water?

    (Also 0 to 8 bar pressure of course...)
  2. Probably not well. Is it a pilot type?



  3. koma

    koma Guest

    I don't think it is a pilot type since it is specified for operation
    from 0 bar.
    A pilot type needs some pressure to actually keep the valve closed,

    It is a spring return on this one.

    I just don't understand how it can be specified for gas and not work
    with for example water?
    If it is airtight it should be watertight as well?
    (For a non-pilot type valve that is...)
  4. Rich Grise

    Rich Grise Guest

    Why can't you ask the place where you got the cylinder?

    Good Luck!
  5. It will probably work for a while. But using equipment in environments
    not originally intended may shorten its life.
  6. I would try air type valves with hydraulic fluid, but water is a different
    thing. It's corrosive and not lubricating. You'd do better to find a water
    type valve.
  7. Jamie

    Jamie Guest

    use solenoid air valves.
    They are designed for water because air gets wet how ever, you
    need to check for the operating temperature of the valve if you
    plan on passing hot water like we do at work.
  8. joseph2k

    joseph2k Guest

    No, not very well. There is this issue of density, gasses at 22 L/mole vs
    water at 18 mL/mole.
    Then there is also the issue of viscosity, it involves how much flow you can
    get through a given size hole. You can get more mass per unit time of a gas
    through a given size hole than you can get of any liquid; in spite of the
    1000:1 density difference.
  9. Rich Grise

    Rich Grise Guest

    I'd also seriously worry about bang-bang control, since water isn't
    (or is only negligibly) compressible - air will do some shock absorbing
    for you.

  10. jasen

    jasen Guest

    water hammer could do it in pretty quick.

    get a solenoid designed for water, mains ones are used in washing machines,
    low voltage ones in irrigation automation.

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