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  1. 10-04-2008, 07:54 PM #10
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    Refrigerologist
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    Re: TXV's To Adjust or Not to Adjust - That is ....

    Quote Originally Posted by US Iceman View Post
    Refrigerologist,

    Wire drawing is where the pin carrier and needle are eroded due to flash gas in the liquid feeding the TXV. This happens over a period of time on ammonia valves which requires them to be rebuilt occasionally.

    If you have seen a piece of wood that has termites or worms feeding on it, the pin and needle look something like this, only rougher.
    Thnaks Iceman, so it is the same as an HFC or CFC system, flash gas in the liquid line, or shortage of gas causes the problem. I have never heard it given that name before! I always called it needle and/or orifice seat wear!
    Last edited by Refrigerologist; 10-04-2008 at 08:00 PM.
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