10. carbon dioxide fire extinguisher

7/31/2019 10. Carbon Dioxide Fire Extinguisher

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CARBON DIOXIDE FIRE EXTINGUISHER (CO2

An extinguisher in hand is better then two fire trucks on the way

Use of CO2 Fire Extinguisher

Co2 Fire Extinguisher is used Against B,

C & E Classes of Fire.

i. Flammable Liquid Materials.

ii. Combustible Gases

iii. Electrical Hazards Such as Transformers, Switches, Circuit

Breakers, and Electronic Equipment.

Effects Of CO2 At Fire

Smothering effect on fire

Less cooling effect on fire

Required Level Of CO2 For Fire Extinguishing

29% CO2 required in atmosphere for fire extinguishing.

Capacity Available in MarketThe following capacities are available in portable cylinders.

1KG

2KG

3KG

4KG

5KG

7KG & trolley montained.



Shoaib Ikram Emergency & Disaster Management Authority CDA Islamabad

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PARTS

Main Body

Safety Pin.

Operating lever.

Control Valve.

Valve Spring.

Discharge Tube (in Co2 Gas Cylinder)

Discharge Horn.

Flexible High Pressure Tube Hose.

CHARACTERISTIC OF CO2

1. Carbon Dioxide is 1.5 times heavier than air. It settles down and reduced the oxygen concentration.



2. It changes its shapes i.e. become liquid under certain pressure.

3. It is non-supporter of combustion; it is also called cold gas.

4. When inhaled in large quantity leads to suffocation.

5. It reduces the percentage of oxygen up to 16% to help in quenching the fire its expansion rate is 1:450.

6. Carbon Dioxide is color less, order less gas and has sour taste .

CONTENTS

• Co2 in liquefied form is filled at a pressure of 744 lbs, psi.

• The cylinder is usually filled to approximately 2/3 rd of its total capacity, 1/3 is

for pressure purpose.

Shoaib Ikram Emergency & Disaster Management Authority CDA Islamabad55

METHOD OF CHARGING

Carbon di oxide is produced in special processing plant from where it is filled in cylinder.

OPERATION

• Remove the safety pin and squeeze the grip with the help of handle.

• Direction of discharge horn should be towards flames/fire.

•It is controllable, when the fire is extinguished close the valve and put back the extinguisher at its place for future use.

INSPECTION TEST

• Visual inspection is difficult for carbon dioxide gas fire extinguisher, because

it is color less and can only be checked by blue litmus paper’s

color will change into red.

• Its visual inspection should be carried out half yearly by weight, and all the

parts should be checked thoroughly.

• If the weight is less than 10% Manufacture/Factory for Refill according to its

requirement.



HYDRAULIC PRESSURE

• 3360 Lbs, Psi, on Manufacturing Time.

• Lbs , Psi, After Five Years.

ADVANTAGES

• It is extremely rapid in action and its action is independent of atmospheric

temperature.

• Cleanliness, being an inert gas, It quickly disperses, leaving no trace behind.

• It is a non conductor of electricity.

• It may be used in their earily stages on fires in a number of highly

inflammable liquids.

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• Being a gas can penetrate into all parts of fire.

DISADVANTAGE

• There is no visible check on the content.

• They must be sent away for recharging.

• It should be noted that co2 extinguisher, cannot be used on any material

which contains its own supply of oxygen.



Shoaib Ikram Emergency & Disaster Management Authority CDA Islamabad

10. carbon dioxide fire extinguisher

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