107
(1) Capillary Tube Size from Table A-1
Tube ID (in) 0.026 0.028 0.031 0.036 0.042 0.052 0.059 0.064
0.026 1.00 0.66
0.028 1.52 1.00 0.56 0.24
0.031 2.71 1.78 1.00 0.43
0.036 2.34 1.00 0.42
0.040 1.82 0.76
0.042 2.40 1.00 0.30
0.044 1.30 0.39
0.049 2.40 0.71 0.35
0.050 0.80 0.39
0.052 1.00 0.49 0.31
0.054 1.24 0.60 0.38
0.055 1.38 0.67 0.42
0.059 2.05 1.00 0.63
0.064 1.59 1.00
0.070 2.64 1.66
0.075 2.46
(2) Desired Capillary Tube Size
Example No. 1
To convert 16 ft of 0.031" capillary to 0.028", multiply length by 0.56, i.e., 16 ft * 0.56 = 9 ft.
As a result, 9 ft of 0.028" capillary has aprroximately the same capacity as 16 ft of 0.031" capillary
404A/507
500 17 ft - 0.031" 18 ft - 0.031" 19 ft - 0.031"
750 16 ft - 0.036" 17 ft - 0.036" 18 ft - 0.036"
1,000 9 ft - 0.036" 9 ft - 0.036" 10 ft - 0.036"
1,250 12 ft - 0.042" 13 ft - 0.042" 14 ft - 0.042"
1,500 9 ft - 0.042" 9 ft - 0.042" 10 ft - 0.042"
2,000 15 ft - 0.052" 16 ft - 0.052" 17 ft - 0.052"
3,000 13 ft - 0.059" 14 ft - 0.059" 14 ft - 0.059"
4,000 11 ft - 0.064" 12 ft - 0.064" 12 ft - 0.064"
6,000
13 ft - 0.059" (2) 14 ft - 0.059" (2) 14 ft - 0.059" (2)
8,000
11 ft - 0.064" (2) 12 ft - 0.064" (2) 12 ft - 0.064" (2)
10,000 10 ft - 0.059" (3) 11 ft - 0.059" (3) 11 ft - 0.059" (3)
12,000 11 ft - 0.064" (3) 12 ft - 0.064" (3) 12 ft - 0.064" (3)
Capillary Tube, Length - OD
Evaporator Temperature, °F
Refrigerant Btu/h per circuit -10 20 45
Table A-1: continued
Table A-2: Capillary tube correction factors assume a 115°F liquid temperature
and 3 ft of heat exchange length
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