Lochinvar Knight XL 100 Series Installation & Operation Manual page 42

7
Hydronic piping
Figure 7-3 Pressure Drop vs. Flow
Table 7A Sizing Information for Temperature Rise Applications_20°F, 25°F, 30°F and 35°F
MINIMUM
Model PIPE
SIZE
400 2"
500 2"
650
2"
800 2"
1000 2 1/2"
42
PRESSURE DROP VS FLOW
(HEAT EXCHANGER ONLY)
400
60
50
40
30
20
10
0
0 10 20 30
TEMPERATURE RISE APPLICATIONS
20°F
GPM FT/HD
38 10
48 14
62 16
76 17
96 18
500 650 800 1000
40 50 60 70
FLOW RATE (GPM)
25°F
GPM FT/HD GPM
30 7 25
38 12 32
50 11 41
61 13 51
76 11 64
Installation & Operation Manual
80 90 100
30°F 35°F
FT/HD GPM
5 22
9 27
9 36
10 44
8 54
FT/HD
4
8
7
9
6