Installation and operations manual, Table 2. pressure loss of liquid refrigerants, Table 3. equivalent feet of pipe – Heatcraft Refrigeration Products PARALLEL COMPRESSOR SYSTEMS 25000102 User Manual
Page 10
10
Part # 25000102
Installation and Operations Manual
Liquid Line Rise in Feet
Refrigerant
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
R-12
5.4
2.8
8.1
4.2
10.7
5.4
13.4
6.9
16.1
8.3
21.5 11.3 26.9 14.3 40.3 22.4 53.7 31.0
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-502
4.9
1.5
7.3
2.2
9.7
3.0
12.1
3.7
14.6
4.5
19.5
6.0
24.3
7.6
36.4 11.5 48.6 14.8
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-404A/R-507 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
Table 2. Pressure Loss of Liquid Refrigerants
(In Liquid Line Risers - Expressed in Pressure Drop, PSIG, and Subcooling Loss, °F)
Based on 110°F liquid temperature at bottom of riser
Table 3. Equivalent Feet of Pipe
(Due to Value and Fitting Friction)
Copper Tube
OD, 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 Value (Open)
14
16
22
28
36
42
57
69
83
99
118
138
168
Angle Value (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