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Table 14-1. Mounting Hole Sizes
Model
A
91
5
/
"
8
92
/
"
5
8
93
/
"
5
8
94
—
*94 size has four holes as shown in Figure 14-1.
Figure 14-1. Mounting Hole Positions
Steam Pipe Capacities
For computing ability of piping to deliver an adequate supply of steam to humidifier.
Capacities shown are in pounds per hour.
Table 14-2. Steam Pipe Capacity at 5 psi
Pressure drop, psi per 100 ft.
Pipe Size
In.
1
/
1
/
8
1
24
31
1
/
52
68
1
4
1
1
/
81
100
2
2
160
210
2
1
/
270
350
2
Table 14-4. Steam Pipe Capacity at 25 psi
Pressure drop, psi per 100 ft.
Pipe Size
In.
1
/
1
/
8
4
/
15
21
3
4
1
30
43
1
1
/
67
95
4
1
1
/
100
140
2
2
210
300
2
1
/
340
490
2
14
(Continued from page 2)
B
C
D
3
/
"-16
11
/
"
8
32
7
/
" Dia.
16
UNC .56
/
"
11
32
Thru
Deep
/
"
1
2
Hole
—
—
of pipe length
1
/
3
/
1
4
2
4
44
54
62
97
120
140
150
180
210
300
370
430
500
610
710
of pipe length
1
/
3
/
1
2
4
30
37
43
61
75
86
130
160
190
210
250
290
420
510
590
690
850
980
E
F
G
2"
3
3
/
"
—
16
2
/
"
3
/
"
—
1
3
2
16
2
/
"
3
/
"
—
3
15
4
16
3
7
/
"
6
9
/
"
3
11
/
"
8
16
16
Table 14-3. Steam Pipe Capacity at 15 psi
Pipe Size
In.
1
1
27
1
/
59
1
4
1
1
/
91
2
2
180
2
1
/
300
2
Table 14-5. Steam Pipe Capacity at 50 psi
Pipe Size
In.
2
1
60
/
27
3
4
122
1
54
260
1
1
/
120
4
410
1
1
/
180
2
840
2
370
1380
2
1
/
620
2
Steam humidifiers (or other
products) should be installed in
locations that allow routine
inspection and accessibility for
maintenance operations.
Armstrong recommends that steam
humidifiers not be placed in
locations where unusual instances
of malfunction of the humidifiers or
the systems might cause damage
to non-repairable, irreplaceable, or
priceless property.
Pressure drop, psi per 100 ft.
of pipe length
/
1
/
1
/
3
/
8
4
2
4
38
53
65
83
120
140
130
180
220
260
370
450
430
600
740
Pressure drop, psi per 100 ft.
of pipe length
/
1
/
3
/
1
4
2
4
38
47
54
77
94
110
170
210
240
260
320
370
530
650
750
870
1070
1240
1
2
76
110
160
230
260
360
520
740
860
1210
2
5
76
120
150
240
340
530
520
830
1060
1680
1750
2760