DCFM SIZING CHART

OIL SEPARATOR
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.

Example:

R134A, 20 Tons at 20°F/110°F = 1.02 DCFM
Total DCFM = 20 tons x 1.02 DCFM = 20.40

For refrigerants and conditions not listed, see our online sizing calculator or contact us for assistance.

Refrigerant Condensing Temp. Evaporating Temp.
-40°F -30°F -20°F -10°F 0°F 10°F 20°F 30°F 40°F
R134A 80°F 1.6 1.56 1.52 1.48 1.45 1.42 1.39 1.36 1.33
90°F 1.44 1.4 1.37 1.33 1.3 1.27 1.24 1.22 1.19
100°F 1.31 1.27 1.24 1.21 1.17 1.15 1.12 1.09 1.07
110°F 1.2 1.17 1.13 1.1 1.07 1.04 1.02 0.99 0.97
120°F 1.11 1.08 1.04 1.01 0.98 0.95 0.93 0.91 0.88
R22 80°F 1.03 1.01 1 0.98 0.97 0.96 0.94 0.93 0.92
90°F 0.93 0.91 0.9 0.89 0.87 0.86 0.85 0.84 0.83
100°F 0.84 0.83 0.81 0.8 0.79 0.78 0.77 0.76 0.75
110°F 0.77 0.75 0.74 0.73 0.72 0.71 0.7 0.69 0.68
120°F 0.71 0.69 0.68 0.67 0.65 0.64 0.63 0.62 0.61
R404A 80°F 1.02 1 0.96 0.94 0.92 0.89 0.87 0.85 0.83
90°F 0.95 0.92 0.89 0.86 0.84 0.81 0.8 0.78 0.76
100°F 0.88 0.85 0.81 0.79 0.76 0.74 0.72 0.7 0.68
110°F 0.83 0.8 0.77 0.74 0.71 0.69 0.67 0.65 0.63
120°F 0.77 0.75 0.71 0.68 0.66 0.63 0.61 0.59 0.58
R410A 80°F - - - - 0.62 0.62 0.61 0.6 0.6
90°F - - - - 0.56 0.55 0.55 0.54 0.53
100°F - - - - 0.5 0.5 0.49 0.49 0.48
110°F - - - - 0.46 0.45 0.44 0.44 0.43
120°F - - - - 0.42 0.41 0.4 0.4 0.39
Refrigerant Condensing Temp. Evaporating Temp.
-40°F -30°F -20°F -10°F 0°F 10°F 20°F 30°F 40°F
R134A 80°F 1.6 1.56 1.52 1.48 1.45 1.42 1.39 1.36 1.33
90°F 1.44 1.4 1.37 1.33 1.3 1.27 1.24 1.22 1.19
100°F 1.31 1.27 1.24 1.21 1.17 1.15 1.12 1.09 1.07
110°F 1.2 1.17 1.13 1.1 1.07 1.04 1.02 0.99 0.97
120°F 1.11 1.08 1.04 1.01 0.98 0.95 0.93 0.91 0.88
R22 80°F 1.03 1.01 1 0.98 0.97 0.96 0.94 0.93 0.92
90°F 0.93 0.91 0.9 0.89 0.87 0.86 0.85 0.84 0.83
100°F 0.84 0.83 0.81 0.8 0.79 0.78 0.77 0.76 0.75
110°F 0.77 0.75 0.74 0.73 0.72 0.71 0.7 0.69 0.68
120°F 0.71 0.69 0.68 0.67 0.65 0.64 0.63 0.62 0.61
R404A 80°F 1.02 1 0.96 0.94 0.92 0.89 0.87 0.85 0.83
90°F 0.95 0.92 0.89 0.86 0.84 0.81 0.8 0.78 0.76
100°F 0.88 0.85 0.81 0.79 0.76 0.74 0.72 0.7 0.68
110°F 0.83 0.8 0.77 0.74 0.71 0.69 0.67 0.65 0.63
120°F 0.77 0.75 0.71 0.68 0.66 0.63 0.61 0.59 0.58
R410A 80°F - - - - 0.62 0.62 0.61 0.6 0.6
90°F - - - - 0.56 0.55 0.55 0.54 0.53
100°F - - - - 0.5 0.5 0.49 0.49 0.48
110°F - - - - 0.46 0.45 0.44 0.44 0.43
120°F - - - - 0.42 0.41 0.4 0.4 0.39