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Thread: What Is It

  1. #1
    Join Date
    Mar 2007
    Location
    New Mexico
    Posts
    1,258

    Default What Is It

    So what does this thing do? I haven't seen one before.

    It's on a Carrier central air conditioning system.

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    Jim Robinson
    New Mexico, USA

  2. #2
    Join Date
    Oct 2003
    Location
    Rockwall Texas
    Posts
    4,519

    Default Re: What Is It

    I asked your question and picture over on the HVAC board and got the following:

    A thermal expansion valve is a component in an air conditioning system that controls the amount of refrigerant flow into the evaporator thus controlling the superheat at the outlet of the evaporator.


  3. #3
    Join Date
    Mar 2007
    Location
    Orlando, FL
    Posts
    1,339

    Default Re: What Is It

    Here is a basic explanation of a TXV for HVAC systems.

    Dom.


  4. #4
    Join Date
    Mar 2007
    Location
    New Mexico
    Posts
    1,258

    Default Re: What Is It

    Thanks. That's definitely it.

    Jim Robinson
    New Mexico, USA

  5. #5
    Join Date
    Jul 2008
    Location
    Utah
    Posts
    389

    Default Re: What Is It

    You will see a TXV on (usually) systems of higher capacity OR ones that have had problems with frosting the coil. As I recall the newer systems with R410a refrigerant don't get as cold and the frosting issue is less of a concern.


  6. #6
    Zibby Bujno's Avatar
    Zibby Bujno Guest

    Default Re: What Is It

    TEV. Like others said, higher efficiency units will have. Next step up from cap tube.


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