heatcraft-refrigeration-p h-im-fl1a Manuel D’Utilisation
9
Table 5. Equivalent Feet of Pipe Due to Valve and Fitting Friction
Copper Tuber, 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 4. Pressure Loss of Liquid Refrigerants in Liquid Line Risers
(Expressed in Pressure Drop, PSIG, and Subcooling Loss, ˚F).
Liquid Line Rise in Feet
10ʼ
15ʼ
20ʼ
25ʼ
30ʼ
40ʼ
50ʼ
75ʼ
100ʼ
Refrigerant 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
R134a
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
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.