Discharge CFM Sizing Chart

Example of Use -

Find the DCFM value for the refrigerant being used at the appropriate evaporating and condensing temperature. Then, multiply this value by the system tonnage at the operating conditions. Use this value to select an oil separator with the nearest maximum DCFM value to the calculated DCFM. i.e. R-134A, 20 Tons @ 20F/110F = 1.02 DCFM. Total DCFM = 20.40 (20 tons x 1.02 DCFM) For refrigerants and conditions not listed, see our sizing calculator Sizing Calculator or contact Westermeyer Industries for assistance.

 

Evaporating
Temperature
    -40°F -30°F -20°F -10°F 0°F 10°F 20°F 30°F 40°F
R-134A Condensing
Temperature
80°F1.601.561.521.481.451.421.391.361.33
90°F1.441.401.371.331.301.271.241.221.19
100°F1.311.271.241.211.171.151.121.091.07
110°F1.201.171.131.101.071.041.020.990.97
120°F1.111.081.041.010.980.950.930.910.88
R-22 Condensing
Temperature
80°F 1.03 1.01 1.00 0.98 0.97 0.96 0.94 0.93 0.92
90°F 0.93 0.91 0.90 0.89 0.87 0.86 0.85 0.84 0.83
100°F 0.84 0.83 0.81 0.80 0.79 0.78 0.77 0.76 0.75
110°F 0.77 0.75 0.74 0.73 0.72 0.71 0.70 0.69 0.68
120°F 0.71 0.69 0.68 0.67 0.65 0.64 0.63 0.62 0.61
R-404A Condensing
Temperature
80°F1.021.000.960.940.920.890.870.850.83
90°F0.950.920.890.860.840.810.800.780.76
100°F0.880.850.810.790.760.740.720.700.68
110°F0.830.800.770.740.710.690.670.650.63
120°F0.770.750.710.680.660.630.610.590.58
R-410A Condensing
Temperature
80°F         0.62 0.62 0.61 0.60 0.60
90°F         0.56 0.55 0.55 0.54 0.53
100°F         0.50 0.50 0.49 0.49 0.48
110°F         0.46 0.45 0.44 0.44 0.43
120°F         0.42 0.41 0.40 0.40 0.39
CO2 Condensing
Temperature
20°F0.37 0.37 0.37    
40°F0.30 0.30 0.30    
60°F0.23 0.23 0.23