Raypak 336A User Manual
Page 21
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
Fig.# 2012
CAST IRON HEADERS (ASME)
FLOW RATES
HEAT EXCHANGER PRESSURE DROP TABLES
POLYMER HEADER (STANDARD MODELS)
FLOW
GPM
PRESSURE DROP (FT OF HEAD)
206/207
266/267
336/337
406/407
20
1.5
2.8
4.1
4.1
30
1.7
4.6
5.8
5.8
40
2.1
5.2
6.5
6.5
50
2.4
5.6
7.2
7.2
60
2.8
6.1
7.7
7.7
70
3.7
6.5
8.2
8.2
80
4.6
7.3
8.7
8.7
90
5.7
8.8
10.2
10.2
100
6.8
10.0
13.0
13.0
CAST IRON HEADER (ASME MODELS)
FLOW
GPM
PRESSURE DROP (FT OF HEAD)
206/207
266/267
336/337
406/407
20
1.8
3.9
3.9
3.9
30
2.2
8.0
8.0
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