MAXIMUM VOLUME OF ENCLOSURE
THAT CAN BE PROTECTED BY THE
3.0 LB. SSP 1230 SYSTEM
MAXIMUM VOLUME OF ENCLOSURE
THAT CAN BE PROTECTED BY THE
7.0 LB. SSP 1230 SYSTEM
MAXIMUM VOLUME OF ENCLOSURE
THAT CAN BE PROTECTED BY THE
14.0 LB SSP 1230 SYSTEM
PRE-ENGINEERED SYSTEM
CALCULATION GUIDE
Maximum hazard volume ( ft3 )
Maximum hazard volume ( ft3 )
Maximum hazard volume ( ft3 )
Minimum
enclosure
temp
Table 6 - Maximum Volume Enclosure for 14 lb. System
Table 5 - Maximum Volume Enclosure for 7 lb. System
Table 4 - Maximum Volume Enclosure for 3 lb. System
Design concentration number
3
10
95.8
71.1
56.3
46.4
39.4
34.1
30.0
26.7
Minimum
enclosure
temp
Design concentration number
3
10
69.9
62.2
223.6 166.0 131.4 108.4 91.9
79.5
Minimum
enclosure
temp
0
Design concentration number
3
10
447.2 332.0 262.8 216.7 183.8 159.1 139.9 124.5
10
98.0
72.7
57.6
47.5
40.3
34.8
30.6
27.3
10
228.6 169.7 134.3 110.8 93.9
81.3
71.5
63.6
10
457.2 339.4 268.7 221.5 187.9 162.6 143.0 127.3
20
100.3 74.5
59.0
48.6
41.2
35.7
31.4
27.9
20
234.1 173.8 137.6 113.4 96.2 83.3
73.2
65.2
20
468.2 347.6 275.2 226.9 192.4 166.5 146.4 130.3
30
102.7 76.2
60.4
49.8
42.2 36.5
32.1
28.6
30
239.6 177.9 140.8 116.1
98.5 85.2
74.9
66.7
30
479.3 355.8 281.6 232.2 196.9 170.5 149.9 133.4
40
105.1 78.0
61.7
50.9 43.2
37.4
32.9
29.2
40
245.2 182.0 144.1 118.8 100.7 87.2
76.7
68.2
40
490.3 364.0 288.1 237.6 201.5 174.4 153.3 136.5
501.4 372.2 294.6 242.9 206.0 178.3 156.8 139.6
50
107.4 79.8
63.1
52.1
44.1
38.2
33.6
29.9
50
250.7 186.1 147.3 121.5 103.0 89.2
78.4
69.8
50
60
109.8 81.5
64.5 53.2
45.1
39.1
34.3
30.6
60
256.2 190.2 150.6 124.1 105.3
91.1
80.1
71.3
60
512.4 380.4 301.1 248.3 210.6 182.3 160.2 142.6
70
112.2 83.3 65.9 54.4
46.1
39.9
35.1
31.2
70
261.7 194.3 153.8 126.8 107.6
93.1
81.9
72.9
70
523.5 388.6 307.6 253.7 215.1 186.2 163.7 145.7
80
114.5 85.0
67.3
55.5
47.1
40.7
35.8
31.9
80
267.3 198.4 157.1 129.5 109.8 95.1
83.6
74.4
80
534.5 396.8 314.1 259.0 219.6 190.1 167.2 148.8
90
116.9 86.8
68.7
56.6 48.0
41.6
36.6
32.5
90
272.8 202.5 160.3 132.2 112.1
97.0
85.3
75.9
90
545.6 405.0 320.6 264.4 224.2 194.1 170.6 151.9
556.6 413.2 327.1 269.7 228.7 198.0 174.1 154.9
100
119.3 88.5
70.1
57.8
49.0
42.4
37.3
33.2
100
278.3 206.6 163.6 134.9 114.4 99.0
87.0
77.5
100
110
121.6 90.3
71.5
58.9 50.0
43.3
38.0
33.9
110
283.8 210.7 166.8 137.5 116.6 101.0 88.8
79.0
110
567.7 421.4 333.6 275.1 233.3 201.9 177.5 158.0
120
124.0 92.1
72.9
60.1
51.0
44.1
38.8
34.5
120
289.4 214.8 170.0 140.2 118.9 102.9 90.5
80.5
120
578.7 429.6 340.1 280.4 237.8 205.8 181.0
130
126.4 93.8
74.3
61.2
51.9
45.0
39.5
35.2
130
294.9 218.9 173.3 142.9 121.2 104.9 92.2
82.1
130
589.8 437.8 346.6 285.8 242.3 209.8 184.4 164.2
161.1
HOW TO DETERMINE THE CORRECT
SSP 1230 SYSTEM FOR YOUR APPLICATION.
Flammable Liquid
Step 1
Identify the hazard to protect and note the
applicable design concentration number.
Example: Hazard is Class C (Energized) 4.5%
4.7% required
Round up design concentration to 5%
(next whole number)
Electrical Control Cabinet
H = 8 ft.
Design Concentration % v/v
Flammable Liquid
Table 2 - Flooding Factor Numbers
Design Concentration % v/v
1-Butane
6.37
lsooctane
6.11
1-Propanol
7.02
Isopropanol
Alcohol
6.37
Design concentration number
3
10
30F
0.0292
0.0394
0.0497
0.0603
0.0711
0.0821
0.0934
0.1049
2,2,4trimethylpentane
6.11
Methane
7.28
40F
0.0286
0.0385
0.0486
0.0589
0.0695
0.0803
0.0913
0.1026
2-butoxyethanol
6.76
Methanol
8.45
50F
0.0279
0.0376
0.0475
0.0576
0.0680
0.0785
0.0893
0.1003
Acetone
5.59
Acetonitrile
4.20
Commercial
Heptane
Commercial
Hexanes
W = 5 ft.
L = 2 ft.
Table 1 - Hazards to Protect
5.72
Methyl
Ethyl Ketone
Methyl
Isobutyl Ketone
Methyl Tert
Butyl Ether
5.85
5.72
5.95
5.59
n-Heptane
5.85
Cyclohexane
5.85
n-Heptane
6.11
Cyclopentanone
5.98
Octane
5.72
Denatured Alcohol
(92.2% EtOH,
4.6%
IPA, and 3.1%
MeOH)
6.89
Propane
7.54
Diesel Fuel
4.42
Pyrrolidine
6.11
Diethl Ether
6.37
Technical Heptane
5.59
Ethanol
7.15
Tetrahydrofuran
6.50
Ethyl Acetate
6.11
Toluene
4.55
60F
0.0273
0.0368
0.0465
0.0564
0.0665
0.0768
0.0874
0.0981
70F
0.0267
0.0360
0.0455
0.0552
0.0651
0.0752
0.0855
0.0961
80F
0.0262
0.0353
0.0446
0.0541
0.0637
0.0736
0.0838
0.0941
90F
0.0257
0.0346
0.0437
0.0530
0.0624
0.0721
0.0821
0.0922
100F
0.0252
0.0339
0.0428
0.0519
0.0612
0.0707
0.0804
0.0904
110F
0.0247
0.0332
0.0420
0.0509
0.0600
0.0693
0.0789
0.0886
120F
0.0242
0.0326
0.0412
0.0499
0.0589
0.0680
0.0774
0.0869
130F
0.0237
0.0320
0.0404
0.0490
0.0578
0.0667
0.0759
0.0853
Step 2
To identify the flooding factors number determine the
enclosures minimum temperature and align this with the
rounded up design concentration number in Table 2 left.
Example: Minimum temperature is 70F, rounding up
number is 5; therefore flooding factor number is 0.0455.
Step 3
Calculate cubic feet of enclosure by multiplying the
width x length x height. To identify required system
size multiply cubic feet of enclosure by the flooding
factors number.
Example: Enclosure is 5 ft. W x 2 ft. L x 8 ft. H = 80 cubic
feet. 80 x 0.0455 = 3.64. This would round up to the 7
lb. system.
Step 4
Use Table 3 to double check that the enclosure to be
protected does not exceed the maximum area coverage
of the tested nozzles and the volume coverage does
not exceed the maximum hazard volume of enclosure
in Table 4.
Example: The enclosure is 10 ft2 and the max coverage
of 7 lb nozzle is 108.10 ft2. The 7 lb system can protect up
to 153.8 ft3 at 70F with a design concentration of 5%.
Table 3 - Maximum Area Coverage
Gasoline-87 oct.
unleaded
5.85
Transformer Oil
5.98
Max area coverage
3 lb.
46.33 ft2
7 lb.
108.10 ft2
14 lb.
216.10 ft2
5.85
Class A &
de-energized
4.20
Class C Fires
*Note: Design Concentration for Class B Fire are shown in the above table and
includes a 30% safety factor from the minimum extinguishing concentration.
Hexene
System
