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  1. #1
    Join Date
    May 2008
    Location
    Central Fla.
    Posts
    311

    Anybody ever heard of a .....

    RAWL s Device? Supposed to be a new type of metering device. Thanks for any help,Dave...

  2. #2
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,478
    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

  3. #3
    Join Date
    May 2008
    Location
    Central Fla.
    Posts
    311
    Thanks that was what I was after.

  4. #4
    Join Date
    Jun 2001
    Location
    Michigan
    Posts
    12,077
    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.

  5. #5
    Join Date
    May 2008
    Location
    Central Fla.
    Posts
    311
    Good to know,I think we are going to start using them.

  6. #6
    Join Date
    Mar 2003
    Posts
    7,326
    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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