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| GL-23TM Extinguishing Agent for Total Flooding Applications |
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| HIGHLIGHTS |
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GL-23TM is a gaseous extinguishing agent, which can be used as a replacement for Halon 1301 in total flooding systems to protect “normally occupied”
areas.
GL-23 is efficient on Class A, B and C fires, it is electrically no-conductive and leaves no residue after
discharge.
Halogenated extinguishing agents, when in contact with fires or burning
surfaces, generate dcomposition byproducts, which can be harmful to
humans. In order to limit the creation of toxic byproducts, GL-23 fire frotection systems are designed with a maximum discharge time of 10
seconds. The addition of isoprpenyl l-methyl cyclohexene further reduces the creation of toxic
fumes.
Due to its extremely low toxicity level, GL-23 is suitable for protection of “normally occupied”
areas, allowing the designer to apply large safety factors, when the risk requires high system
reliability. Even for the most critical applications, the design concentration will be far lower than that which would cause harmful effects to the personnel present in the protected area. The minimum extinguishing concentration for
n-heptane, determined by the cup-burner test, is 12% by volume.
The physical properties of GL-23 allow a fast and homogeneous distribution in the protected volume, ensuring a rapid and efficient extinguishment of the
fire.
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| Use |
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GL-23 complies with the requirements of purity for HFC 23 as listed in international standards for gaseous extinguishing agents.
Although any potential fire risk presents its own particular complexities, the choice of GL-23 in a fire protection system is suitable when:
・ an electrial no-conductive gaseous extinguishing agent is required
・ the clean-up of another media would represent a problem
・ to guarantee a high system reliability and, at the same time, the safety of personnel is of essence
・ sub-zero temperatures are encountrad in the protected volume.
Typical examples of hazards where the use of GL-23 is suitable are: computer rooms, control rooms, archives, flammable liquid stores, laboratories, military vehicles, telecommunications system.
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| Environmental impact |
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The Montreal Protocol, which establishes the actions to control emissions of substances damaging the ozone layer, banned the manufacture of Halons due to their high Ozone Depletion Potential (ODP). GL-23, unlike Halon 1301 (ODP = 12-16), does not contain Bromine nor Chlorine.
Consequently, it does not deplete the stratospheric ozone layer (ODP = 0).
Taking into consideration the reduced quantity of this product, which would be used for very specific applications, then the Global Warming Potential (GWP) and Atmospheric Lifetime (ALT) are also acceptable.
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| Toxicity |
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GL-23 does not pose any risk to humans when used at its recommended desing concentration.
GL-23 acute toxicity (LC50 for 4 hours = >65%) is far higher than the normal concentrations of use. Exposure at lower concentrations for a limited period of time does not represent a risk to personnel.
Nevertheless, like Halon 1301, exposure to the product at higher concentrations and for longer periods of time can cause indisposition, lack of coordination and heart arrhythmia.
The cardiac sensitization is the first evident symptom when exposed to halogenated extinguishing agents. The NOAEL (No Observable Adverse Effect Level) and LOAEL (Lowest Observed Adverse Effect Level) values for GL-23 are respectively 50% and 50%.
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| GL-23 Physical Properties |
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| 1301 |
GL-23 |
Halon 1301
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| Molecular weight |
70.01 |
148.93 |
| Boiling point @ 1 atm (°C) |
- 82.2 |
- 57.8 |
| Critical temperature (°C) |
25.9 |
67 |
| Critical Pressure (bar) |
48.36 |
39.6 |
| Critical density (Kg./m3) |
525 |
745 |
| Vapour pressure @ 25°C (bar) |
47.29 |
16.20 |
| Liquid density @ 25°C (g/ml) |
0.67 |
1.57 |
| Freezing point (°C) |
-155.2 |
-168 |
| Specific heat of liquid @ 25°C (j/Kg °C) |
1,549 |
910 |
| Heat of vapourization at boiling point point
(Kj/Kg) |
329.5 |
120.9 |
| Viscosity of liquid @ 25° C (cP) |
0.083 |
0.059 |
| Solubility in water @ 25° C (% weight) |
0.1 |
0.03 |
| Phisical state |
Liquid/vapour |
Liquid/vapour |
| 1301 |
GL-23 |
Halon 1301
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Ozone
Depletion Potential
(CFC
11 = 1)
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0 |
12 ? 16 |
Global Warming Potential
(Kg.
CO2 - 100 year horizon)
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12,100 |
5,600 |
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Atmospheric
Lifetime
(years)
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250 |
65 |
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Gielle Srl - 管理部門
Via R. Ferri 1001 - 70022 Altamura (Ba) Italy
Tel +39 0803118998 - Fax + 39 0803101309
E-mail: info@fm200.biz |
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