31
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.
