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Thread: How to attach the flex line to the rest of the system?

  1. #1
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    How to attach the flex line to the rest of the system?

    This is a serious n00b question but I dont wanna mess something this trivial up.

    I bought a flex line much like this one:
    http://cgi.ebay.com/36-Stainless-Ste...QQcmdZViewItem

    How in the world do I go about attaching it to the rest of the system? Is there a special fitting I need or what? Im pretty clueless right now.

    Thanks

  2. #2
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    That hose uses flare fittings. You will need a couple of small brass flare fittings and a flaring kit to connect it to copper tube .

    EDIT: Found a couple of pics from my first single-stage that may help you .

    This is what it looks to have in one end of the hose;



    EDIT AGAIN:

    This is a flaring kit that you will need to flare the copper tube;


    AND AGAIN (lol):

    This picture shows the small brass fittings on each end of the hose, which connects the copper tube;



    Hope this makes it clearer for you. I would link you to a picture of what exactly a flare looks like but I don't have any pics sorry!
    Last edited by Brettbeck; 05-08-2007 at 01:08 PM.

  3. #3
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    Be sure if the flex line can hold pressure and cold.
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  4. #4
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    This is something I haven't understood about flex-lines: holding pressure. The flexline is on the lowside, where the pressure normally is 1bar or less. What's important about the flexline being able to hold pressure, when it's just under normal atmospheric pressure?
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  5. #5
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    static pressure is higher than 1 bar(a)

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    Yeah, ur right :P
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  7. #7
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    And don't forget systems are supposed to be pressure tested to about 40bar .

  8. #8
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    Ehh, believe 15bar is sufficient for an SS.
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  9. #9
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    many gas lines like that only have osi ounces per square inch of working pressure.so be sure it will with stand the highest pressure you will put it under.Static when machine is off and warmed up.

    you can also braze ss with 40% or higher silver content, silver solder +flux
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  10. #10
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    Quote Originally Posted by Big SturL View Post
    Ehh, believe 15bar is sufficient for an SS.
    I suppose 15bar is acceptable for a small SS like a lot of people build.

    R410a A/C systems are supposed to be tested to 40bar, even though the pressures probably don't reach quite that high.

  11. #11
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    After you have run a SS and you turn it off "HOT", the pressure on low and high side will equalize and pressure can easily get up to 100psi and more. I would say this is a norm.
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  12. #12
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    At least 15 bar is what the HVAC/R-guys that I "work" with use for pressuretesting.
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