| |
| |
 |
 |
| |
CO2
System Operation
|
 |
|
Reducing
the oxygen
content
from the
normal 21%
down to
14% will
extinguish
most surface
fires thus
requiring
a 34% CO2
concentration
level. Depending
upon the
application
a significant
amount of
cooling
is also
provided.
Rapid expansion
of the snow
to gas reduces
the ambient
temperature
in the hazardous
area which
accelerates
the extinguishing
process
and retards
reignition. |
CO2
is stored
as a liquid
under pressure,
usually
57 bars
at 20°C,
in high
pressure
steel containers.
The CO2
system is
actuated
by different
modes: |
• Electric solenoid
• Pneumatic
• Local manual release (at control head)
• Remote manual release
|
When
the system
is actuated,
the closed
valve opens,
allowing
the container
vapour pressure
to propel
the liquid
CO2 via
the distribution
pipe work
to discharge
through
specially
designed
nozzles
where it
readily
vapourises
resembling
a cloud
of steam.
This clouding
is due to
moisture
in the air
becoming
frozen as
a result
of the extremely
low temperature
of the expanding
CO2. |
 |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
.: |
|
|
|
|
|
| |
|
 |
|
|
|
|
|
|
Copyright
2006-2007.
National Fire Fighting Manufacturing FZCO(NAFFCO), All
rights reserved
NAFFCO reserves the right to modify specifications without
prior notice.
Site powered by NAFFCO Creative Division. |
|
|
