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I have been looking for a nomnograph for R410A without any luck. I usually use the DuPont Refrigeration manual for pipe sizing and that is fine. They have Nomnographs for most of the other refrigerants but not 410A.

Specifically I am looking to size a 10 ton system with a long run and am concerned about low velocity and oil return with the pipe size the engineer is using.

Looking for a velocity/pressure drop chart/nomnograph fo 410A


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