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Water CO2 fire extinguisher

Water CO2 fire extinguisher
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Water CO2 fire extinguisher contains only water and carbon dioxide cartridge . Cartridge seals inside the extinguisher . The plunger has a piercing type nail attached to it in such way that it will puncture the sealing disc of CO2 cartridge when pushed down .

There are two type of water CO2 fire extinguisher based on their position :

For operation –

  • Upright type : these provide with a dip pipe attached to outlet point with or without a discharge hose pipe.
  • Invertible type : there are no dip pipe in this type of extinguisher and no discharge pipe is provided.

The capacity of water CO2 extinguisher is 6 litr , 9 litr and 50 litr.

Operation of water CO2 fire extinguisher :

  • First the safety clip open .
  • Remove from the wall .
  • The top handle of extinguisher catch with the left hand .
  • It placed 6 feet away from the fire .
  • Hold the pipe in left hand and press the knob to puncture the CO2 cartridge seal disc .
  • Discharge the carbon dioxide cartridge allows the water inside the extinguisher to come out through the pressure and helps to extinguish the fire .
  • When the extinguisher finish , it will be laid horizontally on the ground .
  • Do not use on electrical equipment fire and oil type fire .

Recharging process :

  • Open the cap .
  • Extinguisher and it’s parts clean .
  • Extinguisher admitted with a certain amount of water .
  • Old or uses carbon dioxide cartridge was changed by using a new CO2 cartridge .
  • And it locked well .
  • The new label for when extinguisher check labeled .

Test :

  • Every three months the CO2 cartridge check it’s weight .
  • However , if the 10% lower than the original weight then it change.
  • Each cartridge weight written on his neck and his expiry date given .
  • Every month the other parts at extinguisher need to be checked .
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Fire Extinguisher type

What is Fire Extinguisher :

Extinguisher is an active fire protection device which is used to control small fire often immergency situatiation . It not intended for use on an out-of-control fire . Fire reaches the roof. It become endangers the user and requires the expertise of a fire brigade.

Fire extinguisher

Type of Extinguisher :

  1. Water CO2 extinguisher.
  2. Foam extinguisher.
  3. Dry chemical extinguisher .
  4. CO2 extinguisher.
  5. Wet chemical extinguisher.

The advantage of acknowledge and uses of Fire Extinguisher :

Water CO2 extinguisher :

Water CO2 extinguisher

Label colour : Bright Red

Fire type : Only class A

Use for –

  • Chemical free materials are paper , cardboard , fabric and textile , wood and coal .

Do not use for –

  • Fire involving electric equipment , kitchen fires , easy set on fire gas and liquid .

Foam extinguisher :

Foam extinguisher

Label colour : Cream

Fire type : class A & B

Use for –

  • Chemical free materials are paper , cardboard , fabric , textile , wood , coal .
  • Easy set on fire liquid.

Do not use for –

  • Kitchen fire , fire involving electrical equipment fire , easy set on fire metals .

Dry chemical powder :

Label colour : Blue

Use for

  • Chemical free materials are paper , cardboard , fabric , textile , wood , coal .
  • Easy set on fire liquid and gas like liquify petroleum gas ( LPG ) and acetylene .
  • Fire involving electrical equipment upto 1000 volt .

Do not use for 

  • Fire involving electrical equipment above 1000 volt.
  • Cooking oil
  • Public place with small area .

CO2 extinguisher :

Label colour : Black

Use for –

  • Electrical fire
  • Easy set on fire liquid.

Do not use for –

  • Combustible materials are documents , stiff paper , cloths , wood , coal
  • Easy set on fire materials .

Wet chemical extinguisher :

Label colour : yellow

Use for :

  • Cooking oil
  • Combustible materials ( meaning :  a substance that can be burned to provide heat or power ) like wood , paper , textile and fabric.

Do not use for –

  • Flammable ( meaning : easy set on fire ) liquid and gas .
  • Electrical equipment fire .
  • Flammable materials.

How to operate fire extinguisher :

Process of fire extinguisher

Read more… “Fire Extinguisher type”

fire

WHAT IS FIRE :

It is the chemical chain reaction in between of oxygen and combustible material or vaporous fuel ( solid : wood , liquid : petrol ) . To keep on the process of oxidation produces heat and light . This fact is know as FIRE

Fire needs 3 things to exist :

  • Four different class of FUEL :
    • A : wood , paper , cloth
    • B : flammable liquid , oil
    • C : Gasoline gas , hydrogen gas , butan
    • D : Potassium , sodium , aluminum
    • E : Electrical equipment
    • F : Cooking oil
  • OXYGEN
  • HEAT

IT’S MAKE FIRE TRIANGLE “ fire triangle

For the purpose of extinguishers work , first need to know a little bit about fire .
Four things must be present at the same time in order to make flame .
1. Enough oxygen to sustain combustion .
2. Enough heat to raise to material to its ignition temperature .
3. Some sort of fuel , chemical and exothermic reaction that is flame .
** Essentially , extinguishers put out flame by taking away one or more elements of the fire triangle . **

In a typically wood fire :

Something the wood reach to a high temperature. The heat comes from lots of different things — a match, focused light, friction, lightning etc.

When the wood reaches about 150 degrees Celsius , the heat decomposes some of the cellulose material that makes up the wood.

Some of the decomposed material is released as volatile gases. We know these gases as smoke. Smoke is compounds of hydrogen, carbon and oxygen. The rest of the material forms pure carbon, and ash, which is all of the nonburnable minerals in the wood .

The actual burning of wood then happens in two separate reactions:

  • When the volatile gases are hot about 260 degrees C for wood , the compound molecules break apart, and the atoms recombine with the oxygen to form water, carbon dioxide and other products. In other words, they burn.
  • The carbon in the char combines with oxygen as well, and this is a much slower reaction.

As they heat up, the rising carbon atoms (as well as atoms of other material) give out light. This “heat produces light” effect is called incandescence, and it is the same kind of thing that creates light in a light bulb. It is what causes the visible flame. Flame color varies depending on what you’re burning and how hot it is. Color variation within in a flame is caused by gases . Typically, the hottest part of a flame — the base — glows blue, and the cooler parts at the top glow orange or yellow.

OXYGEN :

The air we breathe is about 21% oxygen , it needs only 16% oxygen .

HEAT :

The energy necessary to increase the temperature of fuel to where sufficient vapors are given off for ignition to occur .

Auto Ignition Point

Auto Ignition Point :

1. AUTO IGNITION POINT :

This is the lowest temperature at which the substance will ignite spontaneously that is the substance will burn without introduction of a flame or ignition source .

2.FLASH POINT :

It is the lowest temperature at which there is a sufficient vaporization of the substance to produce vapor which will flash monotonously when flame is applied .

3. FIRE POINT :

It is the lowest temperature at which the heat from combustion of a burning to vapor is capable of producing sufficient vapor enable combustion to continue .

  • Maximum surface temperature of some oils and gases :

  • Surface temperature measuring instrument :

Specifications:

  • Measurement range: -50 °C ~ 380 °C ( -58 °F ~716°F )
  • Accuracy: -50°C ~ 0°C( ± 3°C), 0°C ~100°C (± 1.5°C), 100°C~330°C (±1.5%)
  • Repeatability: 1 °C or 1% of reading
  • Resolution:     0.1°C or 0.1°F
  • Response Time:500mSec, 95% response
  • Impassivity : 0.95 Preset
  • Distance To Spot Ration: 12:1
  • Spectral response: 8~14μm
  • Storage Temperature: -20°C ~ 60°C ( -4 °F ~140 °F )
  • Operating Temperature: 0°C ~ 40°C ( 32 °F ~104 °F )
  • Operating Humidity:10-95% RH non-condensing, up to 30°C (86°F )
  • 2*AAA 1.5V battery

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