CO2 Flashcards
(35 cards)
Expansion rate
450:1
Air housing plenum tempature
225*F
Oil storage/oil purification/emergency diesel tempature
160*F
Characteristics
Colorless Heavier than air/Displaces oxygen Inert gas Clean/No residue Odorless Seeks lowest level Non corrosive Non conductive Non deteriorating Non flammable Non toxic Non poisonous
CO2 Tank
High and Low Alarms
High and Low pressure switches
6 ton storage unit (12,000 lbs)
high pressure 350 psi, low pressure 275 psi
6-18 psi min,
CO2 system manufacture
Ansul preferred
What type of CO2 system do we have
Low Pressure Carbon Dioxide Fire Suppression System
CO2 Pressure Vessel
4 inches of insulation
insulation is covered with Aluminum vapor barrier
vessel is provided in a saddle mount configuration
What temp and psi is CO2 stored at
295 psi to 305 psi
the compressor turns on at 305, off at 295
0* F
CO2 tank dimensions
15'10" L 5'10" W 8'6" H 9000lb empty weight 1541 gallons
Bleeder valve
opens at 330psi
Main safety relief valve
set to 350psi
The CO2 system consists of
low pressure storage unit master valves selector valves manual & automatic controls distribution nozzles alarms indicators supervisory devices
master and selector valve
a ball or butterfly valve (depending on piping size)
pneumatic operator - 100 psi operating (150max/80min)
spring return to closed
electrically operated solenoid valve
30sec time delay open solenoid valve (3 rooms)
purpose of the listed and approved releasing control panel
to provide automatic detection and control
lock out valve with supervisory switch
manual lock out valves
1/2 - 2” normal
3-8” has high visibility position monitor & handwheel (oil storage room and main tank)
pressure relief valves
150 psi in actuation line
450 psi in piping where trapped CO2 could exist
350 psi on main tank
have filter to keep from getting clogged
actuation line supervisory pressure switch
2 level, self restoring pressure switch
installed at most remote point in system
1st contact closes at 80 psi
2nd contact closes at 70psi
if CO2 loses power does it still work?
yes 2 12V 50AH battery backup
in closed state, the following zones dump co2
everywhere - discharge pressure switch, manual pull station, heat detectors, turn knobs
units also have phase differential relay while running
CO2 density
1.5 times as dense as atmospheric air
% CO2 concentration that will not support combustion
15.6%
1 lb CO2
100% concentration in 9 ft^3
50% concentration in 20 ft^3
pressure required to lift relief dock
.217 psi