I am a Test and Balance tech and I am currently setting up chilled water coils for a pharma client. The coils all have flanged Grinnell Circuit Setters. I previously worked for a company that had a wheel for these circuit setters but since then Grinnell has been bought out by Tyco and the wheels are no longer available. I am told that the Oventrop model is the same but my flows do not add up when compared to design coil pressure drop from the manufacturer and rough calculations. So my question is, does anyone have flow coefficients for the Grinnell Circuit Setters or a flow chart? Any help is greatly appreciated!