At 45°F Evaporating Temperature and 125°F Condensing Temperature
40
30
20
15
30
25
20
15
12.5
10
9
8
7
6
5
4
3
2
1.5
1.0
.9
.8
.7
40
30
20
15
To use this chart, first find capacity (tons) on left side of chart. To find pipe size, proceed right to smallest pipe size. Pressure drop (vertical line)
and velocity (diagonal lines) can then be determined for the pipe size selected. For example, for 10 ton unit, select 5/8 in. O.D. line.
NOTE - Shaded area denotes unacceptable velocity range.