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  1. #1
    Join Date
    May 2004
    Location
    Mississippi Gulf Coast
    Posts
    54
    What would be the highest acceptable suction line pressure drop, and lowest refrigerant velocity ( ft/minute ) @ +42 sst for R404A and R407C?

    [Edited by bayou dude on 06-14-2004 at 05:18 PM]

  2. #2
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,078
    I generally like to size for about 2#/100ft equivalent length of run for pressure drop The minimum velocity depends on on if you're running horizontally or vertically and how much unloading (if any) is involved......1500 FPM is a good starting point. Larger risers need higher velocities to "entrain" the oil for proper return.

    Speaking of "Trane", they seem to like pressure drops up to 6#/100 ft and velocities up to 4000 FPM.

  3. #3
    Originally posted by bayou dude
    What would be the highest acceptable suction line pressure drop, and lowest refrigerant velocity ( ft/minute ) @ +42 sst for R404A and R407C?

    [Edited by bayou dude on 06-14-2004 at 05:18 PM]

    Hey Bayou Dude ... my wife's from Luisianna. She's a Cajun Gal.

    Do you know any Cajun jokes? I got one for you.

    Welcome to the forum community.

    We're all just one big ol happy family round here. Save for a few misfits who entertain us once in awhile with ramblings ....from "another world"...



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