Introduction:
gas hfc-227 is known chemically as Heptafluoropropane. gas hfc-227 is a colourless gas which is liquified under pressure for storage. Like Halon 1301 it has a low toxicity level and is superpressurised with Nitrogen to 24.8bar(360psi). It rapidly extinguishes most commonly found fires through a combination of chemical and physical mechanisms.
FEATURES
Zero ozone depleting potential
Safe for use in occupied areas
Suitable for protection on a range of high value risks
Existing Halon/CO2 control systems can be adapted for use with gas hfc-227
Requires minimal storage space
Like Halon, no clean-up required after discharge
Low pressure system
Listed in NFPA 2001 and draft ISO
ENVIRONMENTAL FEATURES:
gas hfc-227 contains no bromine or chlorine and therefore has zero Ozone Depleting Potential(ODP). The atmospheric lifetime of gas hfc-227 is between 31 and 42 years which along with its zero ODP presents a long-term solution to fire protection requirements.
SAFETY:
gas hfc-227 has been found to be less toxic than Halon 1301, which makes it safe for use in the fully automatic mode in occupied areas.
Typically gas hfc-227 requires a design concentration of 7%, which is well below the 9% No Observable Adverse Effect Level(NOAEL) on cardiac sensitisation. The NOAEL for Halon 1301 is only 5%(the same as its design concentration).
APPLICATIONS:
gas hfc-227 is immediately available to protect most hazards traditionally protected using Halon 1301. It is effective in the protection of data processing, telecommunications and electronic equipment as well as most flammable liquids and gases.
REPLACING HALON WITH gas hfc-227
Existing Halon and CO2 control systems meeting the requirements of the relevant national or international standards are ideally suited for use with gas hfc-227 and can be modified to operate as part of an gas hfc-227 system.
Due to the differences in concentration and physical characteristics between the gases it will be necessary to change the container valve and nozzles and probably the pipework and storage containers in carrying out a retrofit of an existing system. However, due to the similarities in the equipment, changing from Halon or CO2 to gas hfc-227 can be accomplished with minimal disruption and little or no system downtime.
gas hfc-227 fire suppression agent is an acceptable replacement for Halon 1301. gas hfc-227 has a zero ozone depleting potential, a low global warming potential, and a short atmospheric lifetime. It is particularly useful where an environmentally acceptable agent is essential, where clean up of other media presents a problem, where weight versus suppression potential is a factor, where an electrically nonconductive medium is needed, and where people compatibility is an overriding factor. Examples of typical applications are: Data Centers, Electrical and Electronic Equipment Rooms, Telecommunications Facilities, etc.
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