Tyco Fire Suppression & Building Products ANSUL AQUASONIC, Design, Installation, Recharge, And Maintenance Manual

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APPENDIX A
3-1-2010 Page A-9
NITROGEN CALCULATION PROCEDURE (Continued)
PIPING and FITTING NOTES: (Continued)
Table 6 – Pipe Pressure Loss (Nitrogen)
008528
STEP NO. 10 – DETERMINE ATOMIZER PRESSURE
LOSS
10a – Size Piping and Calculate Pipe Pressure Loss
(PPL) in Supply Line A:
Linear Length A1 through A4 + equivalent lengths of all
fittings in each pipe line x pressure loss (see Table 6) =
Pipe Pressure Loss (PPL).
Example:
1 in. Schedule 40 piping:
Length A1, 20 ft (6.096 m) + A2, 2 ft (0.610 m) + A3,
4.5 ft (1.372 m) + A4, 12 ft (3.658 m) + A5, 4 ft (1.219 m)
= 42.5 ft (12.957 m)
Equivalent length of 1-1/2 in. tee = 2.5 ft (0.76 m) (see
Table 1) Note: Because the full flow is going through one
branch of the tee treat it the same as an elbow of the
same size.
Equivalent length of 1 in. elbow = 2.5 ft (0.76 m) (see
Table 5)
Two elbows in Supply Line A = 2 x 2.5 ft (0.76 m) (equiva-
lent length per elbow) = 5.0 ft (1.52 m)
42.5 ft (12.957 m) + 2.5 ft (0.76 m)+ 5.0 ft (1.52 m) =
50.0 ft (15.33 m) total equivalent length of pipe
Select the correct pressure from (Table 8) for the number
of atomizers flowing through this pipe section. Since there
are four atomizers, the pressure loss factor would be
0.56339 psi/ft (0.12735 bar/m) (See Table 6).
You must also include the friction loss due to the 1 1/2 in
selector valve which has an equivalent length of 75.5 ft
(23.02 m) of 1 1/2 in pipe (See Table 5).
Select the correct pressure from (Table 8) for the number
of atomizers flowing through this selector valve. Since
there are four atomizers, the pressure loss factor would
be 0.06040 psi/ft (0.01365 bar/m) (See Table 6).
Pressure loss for Supply Line A = 50.0 ft (15.33 m) of
1 in. pipe x 0.56339 psi/ft (0.12735 bar/m) + 75.5 ft
(23.02 m) x 0.06040 psi/ft (0.01365 bar/m) = 32.73 psi
(2.266 bar).
Selector Valves
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0.
12
79
8
0.
51
19
2
0.
03
52
1
0.
14
08
5
0.
31
69
1
0.
56
33
9
0.
03
41
9
0.
07
69
3
0.
13
67
7
0.
21
37
0
0.
30
77
3
0.
41
88
5
0.
54
70
7
0.
03
39
8
0.
06
04
0
0.
09
43
8
0.
13
59
0
0.
18
49
8
0.
24
16
1
0.
30
57
8
0.
37
75
1
0.
45
67
9
0.
54
36
2
0.
03
52
5
0.
04
79
8
0.
06
26
7
0.
07
93
2
0.
09
79
2
0.
11
84
9
0.
14
10
1
0.
16
54
9
0.
19
19
3
0.
22
03
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0.
02
89
3
0.
11
57
2
0.
00
79
6
0.
03
18
4
0.
07
16
4
0.
12
73
5
0.
00
77
3
0.
01
73
9
0.
03
09
2
0.
04
83
1
0.
06
95
6
0.
09
46
8
0.
12
36
7
0.
00
76
8
0.
01
36
5
0.
02
13
3
0.
03
07
2
0.
04
18
1
0.
05
46
2
0.
06
91
2
0.
08
53
4
0.
10
32
6
0.
12
28
8
0.
00
79
7
0.
01
08
5
0.
01
41
7
0.
01
79
3
0.
02
21
4
0.
02
67
8
0.
03
18
8
0.
03
74
1
0.
04
33
9
0.
04
98
1
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Pr
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3
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1
1
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1
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N
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P
ip
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S
iz
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3
/4 1
1
1
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1
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2