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Table 4. Pressure Loss of Liquid Refrigerants in Liquid Line Risers (Expressed in Pressure Drop, PSIG, and Subcooling Loss, ˚F)
Refrigerant
Liquid Line Rise in Feet
10' 15' 20' 25' 30' 40' 50' 75' 100'
PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F PSIG ˚F
R22 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
R507, R404A 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.
Table 5. 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 6. Recommended Remote Condenser Line Sizes
Net Evaporator
Capacity
Total Equiv.
Length
R-22 R507 & R-404A
Discharge Line (O.D.)
Liquid Line Cond. to
Receiver (O.D.)
Discharge Line (O.D.)
Liquid Line Cond. to
Receiver (O.D.)
3,000
50 3/8 3/8 3/8 3/8
100 3/8 3/8 3/8 3/8
6,000
50 3/8 3/8 1/2 3/8
100 1/2 3/8 1/2 3/8
9,000
50 1/2 3/8 1/2 3/8
100 1/2 3/8 1/2 3/8
12,000
50 1/2 3/8 1/2 3/8
100 5/8 3/8 5/8 1/2
18,000
50 5/8 3/8 5/8 1/2
100 5/8 3/8 7/8 1/2
24,000
50 5/8 3/8 5/8 1/2
100 7/8 1/2 7/8 5/8
36,000
50 7/8 1/2 7/8 5/8
100 7/8 5/8 7/8 7/8
48,000
50 7/8 5/8 7/8 5/8
100 7/8 7/8 1-1/8 7/8
60,000
50 7/8 5/8 7/8 7/8
100 1-1/8 7/8 1-1/8 7/8
72,000
50 7/8 7/8 1-1/8 7/8
100 1-1/8 7/8 1-1/8 1-1/8
90,000
50 1-1/8 7/8 1-1/8 7/8
100 1-1/8 7/8 1-1/8 1-1/8
120,000
50 1-1/8 7/8 1-1/8 1-1/8
100 1-3/8 1-1/8 1-3/8 1-3/8
180,000
50 1-3/8 1-1/8 1-3/8 1-3/8
100 1-5/8 1-3/8 1-5/8 1-5/8
240,000
50 1-3/8 1-3/8 1-5/8 1-3/8
100 1-5/8 1-3/8 2-1/8 1-5/8
300,000
50 1-5/8 1-3/8 1-5/8 1-5/8
100 2-1/8 1-5/8 2-1/8 2-1/8
360,000
50 1-5/8 1-5/8 2-1/8 1-5/8
100 2-1/8 2-1/8 2-1/8 2-1/8
480,000
50 2-1/8 1-5/8 2-1/8 2-1/8
100 2-1/8 2-1/8 2-1/8 2-5/8
600,000
50 2-1/8 2-1/8 2-1/8 2-1/8
100 2-5/8 2-5/8 2-5/8 2-5/8
720,000
50 2-1/8 2-1/8 2-1/8 2-5/8
100 2-5/8 2-5/8 2-5/8 3-1/8
840,000
50 2-1/8 2-1/8 2-5/8 2-5/8
100 2-5/8 2-5/8 2-5/8 3-1/8
960,000
50 2-5/8 2-5/8 2-5/8 2-5/8
100 2-5/8 3-1/8 3-1/8 3-5/8
1,080,000
50 2-5/8 2-5/8 2-5/8 3-1/8
100 3-1/8 3-1/8 3-1/8 3-5/8
1,200,000
50 2-5/8 2-5/8 2-5/8 3-1/8
100 3-1/8 3-1/8 3-5/8 4-1/8
1,440,000
50 2-5/8 3-1/8 3-1/8 3-5/8
100 3-1/8 3-5/8 3-5/8 4-1/8
1,680,000
50 3-1/8 3-1/8 3-1/8 3-5/8
100 3-5/8 3-5/8 3-5/8 4-1/8