Rheem P-M406 Operating Instructions - Page 21

Cast Iron Header Asme Models

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FLOW RATES MODEL 206/207 266/267 336/337 406/407 PIPE SIZE 1-1/4"-1-1/2" - 2" 1-1/4"-1-1/2" - 2" 1-1/4"-1-1/2" - 2" 1-1/4"-1-1/2" - 2" MIN. GPM 20 25 35 40 MAX. GPM* 125 125 125 125 *When flow rates exceed maximum GPM an external auxiliary bypass valve is required. See external bypass valve section for details. POLYMER HEADERS CAST IRON HEADERS (ASME) HEAT EXCHANGER PRESSURE DROP TABLES POLYMER HEADER (STANDARD MODELS) FLOW GPM PLASTIC INTERNAL BAFFLE (Manufactured after 11/08) PRESSURE DROP (FT OF HEAD) 206/207 266/267 336/337 406/407 20 4.0 25 4.0 4.6 30 4.0 5.2 35 4.0 5.8 5.2 40 4.6 5.8 5.2 5.2 50 4.6 6.3 6.9 6.9 60 4.6 6.9 6.9 6.9 70 4.6 8.1 9.2 9.2 80 4.6 9.2 9.8 9.8 90 6.9 10.4 10.4 10.4 100 8.1 11.0 12.1 12.1 110 10.4 11.5 13.3 13.3 120 11.0 12.7 17.9 17.9 125 11.5 13.8 20.2 20.2 CAST IRON HEADER (ASME MODELS) FLOW GPM PRESSURE DROP (FT OF HEAD) 206/207 266/267 336/337 406/407 20 1.8 30 2.2 8.0 40 2.5 9.0 9.0 9.0 50 2.7 9.8 9.8 9.8 60 3.3 10.5 10.5 10.5 70 4.3 11.0 11.0 11.0 80 5.5 11.5 11.5 11.5 90 6.8 14.0 14.0 14.0 100 8.2 17.0 17.0 17.0 21

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21
MODEL
PIPE SIZE
MIN. GPM
MAX. GPM*
206/207
1-1/4”–1-1/2” - 2”
20
125
266/267
1-1/4”–1-1/2” - 2”
25
125
336/337
1-1/4”–1-1/2” - 2”
35
125
406/407
1-1/4”–1-1/2” - 2”
40
125
*When flow rates exceed maximum GPM an external auxil-
iary bypass valve is required. See external bypass valve
section for details.
POLYMER HEADERS
CAST IRON HEADERS (ASME)
FLOW RATES
HEAT EXCHANGER PRESSURE DROP TABLES
POLYMER HEADER (STANDARD MODELS)
PLASTIC INTERNAL BAFFLE
(Manufactured after 11/08)
FLOW
GPM
PRESSURE DROP (FT OF HEAD)
206/207
266/267
336/337
406/407
20
4.0
25
4.0
4.6
30
4.0
5.2
35
4.0
5.8
5.2
40
4.6
5.8
5.2
5.2
50
4.6
6.3
6.9
6.9
60
4.6
6.9
6.9
6.9
70
4.6
8.1
9.2
9.2
80
4.6
9.2
9.8
9.8
90
6.9
10.4
10.4
10.4
100
8.1
11.0
12.1
12.1
110
10.4
11.5
13.3
13.3
120
11.0
12.7
17.9
17.9
125
11.5
13.8
20.2
20.2
CAST IRON HEADER (ASME MODELS)
FLOW
GPM
PRESSURE DROP (FT OF HEAD)
206/207
266/267
336/337
406/407
20
1.8
30
2.2
8.0
40
2.5
9.0
9.0
9.0
50
2.7
9.8
9.8
9.8
60
3.3
10.5
10.5
10.5
70
4.3
11.0
11.0
11.0
80
5.5
11.5
11.5
11.5
90
6.8
14.0
14.0
14.0
100
8.2
17.0
17.0
17.0