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  1. #1
    Join Date
    Apr 2005
    Location
    Syracuse, NY
    Posts
    27
    I went to an install today and I noticed that the guys had put the TXV external equalizing line BEFORE the sensing bulb. Is this okay? I was always taught to put the equalizing line AFTER the sensing bulb. Does it really make any difference?

  2. #2
    Join Date
    Apr 2004
    Posts
    7,680
    No

  3. #3
    Join Date
    Jul 2004
    Location
    Southern Alabama
    Posts
    448
    Putting the bulb before the ex line is suggested in case the push rod packing leaks in the valve body; the bulb won't be affected.

    Therefore, the best location is bulb upstream of ex line.

    But, in reality, if you have to put it after the ex line then ok.


  4. #4
    Join Date
    Apr 2005
    Location
    Syracuse, NY
    Posts
    27
    Thank you. I am glad that I did not say anything about it while I was there. I just made a mental note so that I could ask the people here on this board. I've been using this board to supplement my schooling and it has been a great help. THANKS

  5. #5
    Join Date
    Jun 2005
    Posts
    169

    Wink

    Yes there is a difference

    Coz the external equalizer line has a flash gas going thru it. The sensing bulb will be sensing liquid if the ex is BEFORE the sensing bulb.

  6. #6
    Join Date
    Jul 2004
    Location
    Southern Alabama
    Posts
    448
    The only way there is going to be flash gas in the equalizer line is if there is a leak in the packing in the TXV.

    There is not a direct connection between the ex line and the liquid line.

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