Lochinvar FTxl 400 Installation & Operation Manual page 41

6
Hydronic piping
Figure 6-4 Pressure Drop vs. Flow
15 ft
14 ft
13 ft
12 ft
11 ft
10 ft
9 ft
8 ft
7 ft
6 ft
5 ft
4 ft
3 ft
2 ft
1 ft
0 ft
Table 6B Sizing Information for Temperature Rise Applications_20°F, 30°F, 40°F, 60°F and 80°F
MINIMUM
Model PIPE
GPM
SIZE
400 2" 39
500 2" 49
600 2" 59
725 2 1/2" 71
850 2 1/2" 83
(continued)
HEX Pressure Drop
(Full Flow Application)
FTX725-850
TEMPERATURE RISE APPLICATIONS
20°F 30°F
FT/HD GPM FT/HD
3.5 26
4.8 33
4.4 39
4.9 47
5.7 55
FTX400-600
FTX400-600
Flow Rate
40°F
GPM FT/HD
2.8 20 2.5
3.4 24 2.9
3.2 29 2.8
3.5 35 3.0
3.9 41 3.3
Installation & Operation Manual
15 ft
14 ft
FTX725 - 850
13 ft
12 ft
11 ft
10 ft
9 ft
8 ft
7 ft
6 ft
5 ft
4 ft
3 ft
2 ft
1 ft
0 ft
60°F
GPM FT/HD GPM
13 2.4 10
16 2.5 12
20 2.5 15
24 2.7 18
28 2.8 21
80°F
FT/HD
2.3
2.4
2.3
2.6
2.6
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