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Table 26. Equivalent Feet of Pipe Due to Valve and Fitting Friction
Copper Tube, O.D., Type “L” 1/2 5/8 7/8 1 1/8 1 3/8 1 5/8 2 1/8 2 5/8 3 1/8 3 5/8 4 1/8 5 1/8 6 1/8
Globe Valve (Open) 14 16 22 28 36 42 57 69 83 99 118 138 168
Angle Valve (Open) 7 9 12 15 18 21 28 34 42 49 57 70 83
90˚ Turn Through Tee 3 4 5 6 8 9 12 14 17 20 22 28 34
Tee (Straight Through)
or Sweep Below .75 1 1.5 2 2.5 3 3.5 4 5 6 7 9 11
90˚ Elbow or Reducing
Tee (Straight Through) 1 2 2 3 4 4 5 7 8 10 12 14 16
Table 25. Pressure Loss of Liquid Refrigerants in Liquid Line Risers (Expressed in Pressure Drop, PSIG,
and Subcooling Loss, ˚F).
Liquid Line Rise in Feet
10' 15' 20' 25' 30' 40' 50' 75' 100'
Refrigerant PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F
R-22 4.8 1.6 7.3 2.3 9.7 3.1 12.1 3.8 14.5 4.7 19.4 6.2 24.2 8.0 36.3 12.1 48.4 16.5
R-134a 4.9 2.0 7.4 2.9 9.8 4.1 12.3 5.2 14.7 6.3 19.7 8.8 24.6 11.0 36.8 17.0 49.1 23.7
R-507, R-404A 4.1 1.1 6.1 1.6 8.2 2.1 10.2 2.7 12.2 3.3 16.3 4.1 20.4 5.6 30.6 8.3 40.8 11.8
Based on 110˚F liquid temperature at bottom of riser.