Product Overview
Dimensions
A
Sweat version
E
D
A
30
50
70
90
110
130
150
170
190
210
F
A
F
E
D
B B
C
A
A
HC
Code A B C D E F Wt (lb)
523160A 1" NPT 4" 8" 7 5/8" 4 3/16" 3 3/8" 7.0
523168A 1" SWT 3 5/16" 6 5/8" 7" 3 1/2" 3 3/8" 7.0
523170A 1 1/4" NPT 4 1/8" 8 1/4" 7 3/4" 4 5/16" 3 3/8" 7.0
523177A 1 1/4" SWT 3 3/8" 6 3/4" 7 5/8" 4 1/8" 3 3/8" 9.0
523178A 1 1/4" SWT 3 3/8" 6 3/4" 7" 3 1/2" 3 3/8" 7.0
523180A 1 1/2" NPT 5 1/8" 10 1/4" 9 3/16" 5 7/16" 3 3/4" 17
523188A 1 1/2" SWT 4 1/16" 8 1/8" 8 1/8" 4 3/8" 3 3/4" 17
523190A 2" NPT 5 1/8" 10 1/4" 9 1/2" 5 3/4" 3 3/4" 18
523198A 2" SWT 4 5/16" 8 5/8" 8 5/8" 4 7/8" 3 3/4" 18
A
Sweat version
E
D
A
30
50
70
90
110
130
150
170
190
210
F
A
F
E
D
B B
C
A
A
HC
Code A B C D E F Wt (lb)
NA10366
1" NPT 5 1/2" 10 7/8" 7 5/8" 4 3/16" 3 3/8" 9.0
1" SWT 4 3/4" 9 1/2" 7" 3 1/2" 3 3/8" 9.0
1 1/4" NPT 5 5/8" 11 1/8" 7 3/4" 4 5/16" 3 3/8" 9.0
1 1/4" SWT 4 3/4" 9 5/8" 7 5/8" 4 1/8" 3 3/8" 11.0
1 1/4" SWT 4 3/4" 9 5/8" 7" 3 1/2" 3 3/8" 9.0
NA10367
1 1/2" NPT 7 3/8" 14 3/4" 9 3/16" 5 7/16" 3 3/4" 19
1 1/2" SWT 6 1/4" 12 5/8" 8 1/8" 4 3/8" 3 3/4" 19
2" NPT 7 3/8" 14 3/4" 9 1/2" 5 3/4" 3 3/4" 20
2" SWT 6 1/2" 13 1/8" 8 5/8" 4 7/8" 3 3/4" 20
Dimensions for 5231 models with field installed inlet check valve assembles, code
numbers listed in first column.
“Legionella” - Scalding risk
In systems producing domestic hot water
with storage, in order to avoid
the dangerous
bacteria known as ”Legionella”, the hot water must
be stored at a temperature of at least 140°F. At this temperature it is
certain that the growth of the bacteria causing this infection will be totally
eliminated. However, at this temperature the water cannot be used directly,
as it may cause scalding. For example, at 130°F, partial burning takes place
in 30 seconds and at 140°F total burning takes place in 5 seconds.
In view of the above, it is necessary to install a thermostatic mixing valve which
can
:
· reduce the temperature at the point of use to a value lower than that of
storage;
· maintain this value when the incoming
pressure and temperature
conditions vary.
Thermal disinfection
The diagram to the right shows the behavior of the bacteria “Legionella
Pneumophila” when the temperature conditions of the water in which it is
contained vary, in laboratory sample population. In order to ensure proper
thermal “disinfection”, the value must not be below 140°F.
Reference documents
For the prevention and control of Legionella, see the ASHRAE Standard
12-200 and 188-2015.
32
60
80
100
120
140
160
Kills bacteria instantly
Kills 90% of bacteria in 2 minutes
Kills 90% of bacteria in 2 hours
Optimum temperature
for growth of bacteria
Surviving bacteria inactive
32
60
80
100
120
140
160
Kills bacteria instantly
Kills 90% of bacteria in 2 minutes
Kills 90% of bacteria in 2 hours
Optimum temperature
for growth of bacteria
Surviving bacteria inactive
Dimensions with check valves