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  1. 04-19-2010, 08:17 AM #1
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    TwincamDave
    TwincamDave is offline Professional Member*
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    Anybody ever heard of a .....

    RAWL s Device? Supposed to be a new type of metering device. Thanks for any help,Dave...
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  2. 04-19-2010, 09:31 AM #2
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    icemeister
    icemeister is offline SDC/Educational Committee*
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    RAWAL Device

    It's a hot gas bypass/desuperheating control, not a metering device like an expansion valve. It's made up of a HGBP valve, a temperature piloted expansion valve for desuperheating and a mixing chamber.

    Pretty old school technology. It's been around for many years
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  3. 04-20-2010, 04:09 PM #3
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    TwincamDave
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    Thanks that was what I was after.
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  4. 04-20-2010, 04:54 PM #4
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    Dowadudda
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    I have installed a few and have had great success. You can take a single condensing unit and make it of variable capacity. Very nice when you have problems with a single hooked up to several or more loads and your having issues. A little in depth to install but really nice control. The first one I put in was over 4 years ago and have not had one problem with it.
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  5. 04-21-2010, 10:12 AM #5
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    TwincamDave
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    Good to know,I think we are going to start using them.
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  6. 04-21-2010, 01:38 PM #6
    flange
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    be carefull on larger systems, especially if you have unloaders. on small package stuff up to about thirty tons or so, they work well.
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