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  1. #1
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    How to test TXVs' capacity



    see the picture,it is a test method of rating capacity for TXVs used in automobile air-conditioning system.but there is no superheat.i think there must be superheat to open a TXV,am i right?i am so confused and need your help.
    could you tell me the test method of TXVs'capacity you know?Thanks!
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  2. #2
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    Re: How to test TXVs' capacity

    In your picture they are testing the capacity of a TXV, they are keeping it "manually" open by immersing the temp sensing bulb in water of a fixed temperature.

    I always found the easiest way to find a TXVs capacity is to take the details of it and look it up in the manufacturer's data book.

  3. #3
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    Re: How to test TXVs' capacity

    That would cause the TXV to go "wide open" unless it is MOP type.
    That method of testing doesn't look like a very good idea as it would cause floodback.

  4. #4
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    Re: How to test TXVs' capacity

    Aha,

    But if you look at the diagram, it's some sort of test rig and not a "system"...

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