Results 1 to 4 of 4
  1. #1
    Join Date
    Apr 2004
    Location
    Fort Worth, Texas, United States
    Posts
    86

    pneumatic cooling tower control

    I need a control drawing of a bypass valve and fan control.

  2. #2
    Join Date
    Sep 2007
    Location
    Michigan
    Posts
    290
    you should post this in the controls form
    "Yeah I can figure out whats wrong with it, but you were here first and there isn't room for two, plus it's cold up here, I'll be in the van"

  3. #3
    Join Date
    Apr 2004
    Location
    Fort Worth, Texas, United States
    Posts
    86

    thanks

    how about some help instead of worrying about where it is posted

  4. #4
    Join Date
    May 2001
    Location
    Western Wa
    Posts
    1,820

    Them thar newmatics...

    Use 1 pilot signal with the bypass valve positioner set up to close at 50% of span, then the pressure switches for the fans staged on the top 50% of the pilot span.

    Or use separate signals for the bypass and the fan staging.
    God Bless our Veterans

    God Bless the USA

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