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  1. #1
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    Help with Danfoss AKV valves



    Hi everyone, In my search for a Danfoss electronic expansion valve the Selection chart shows 2-possible choices. There is a heading stating "VALVE LOAD" . Under this heading for each is listed one with a rating of 78.1% the other choice 49%. I'm not sure I fully understand this aspect to make the correct choice. I have included a picture.
    Thanks too all.
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  2. #2
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    Re: Help with Danfoss AKV valves

    Select your valve to the correct capacity Kw as you would normally. I think the valve load is the expected percentage that valve will open to suit the given capacity. Depending on the control you are using the valve load/drive usually goes up and down to maintain a steady superheat.

  3. #3
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    Re: Help with Danfoss AKV valves

    Quote Originally Posted by kengineering View Post
    Hi everyone, In my search for a Danfoss electronic expansion valve the Selection chart shows 2-possible choices. There is a heading stating "VALVE LOAD" . Under this heading for each is listed one with a rating of 78.1% the other choice 49%. I'm not sure I fully understand this aspect to make the correct choice. I have included a picture.
    Thanks too all.
    Ken 49% one for sure, as it will control nicely as well as cope with varying & high load as well as possible lower pressure difference across valve.
    They can can control down to 10%
    Both will work, but 49% would be better.

    Thats my opinion anyway

  4. #4
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    Re: Help with Danfoss AKV valves

    Quote Originally Posted by RANGER1 View Post
    Ken 49% one for sure, as it will control nicely as well as cope with varying & high load as well as possible lower pressure difference across valve.
    They can can control down to 10%
    Both will work, but 49% would be better.

    Thats my opinion anyway
    Therefore when selecting this type of valve I should choose one thats close to mid point or 50% so it can accomodate the best of both above and below.
    That does make sense. Now why couldn't Danfoss answer me so concisely.. Thanks.

  5. #5
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    Re: Help with Danfoss AKV valves

    Ken,
    You can also put in conditions your plant may run in Danfoss Directcalc.
    This can show how valve reacts for your situations, which can also assist with the selection of orifice size.

  6. #6
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    Re: Help with Danfoss AKV valves

    Oh Ok Ranger, I just got a call from Danfoss tech support and they helped. Seems the selection calc I Dl from them was obsolete.

  7. #7
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    Re: Help with Danfoss AKV valves

    Quote Originally Posted by kengineering View Post
    Oh Ok Ranger, I just got a call from Danfoss tech support and they helped. Seems the selection calc I Dl from them was obsolete.
    So Ken what is the outcome from their advice, anything different?

  8. #8
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    Re: Help with Danfoss AKV valves

    Sorry, It's been awhile but they suggested the Valve rated 49%. Hooked me up with some new literature. I'm just getting started in this case controller stuff. New DOE stuff has us lookin for ways to save kW's.

  9. #9
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    Re: Help with Danfoss AKV valves

    Thanks for update

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