PRODUCT

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  SERVICE

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Fire Extinguisher

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Wetizer

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These extinguishers are ideal for B and C class and electrical fires. Inflammable liquid fires like petrol, paraffin, oil, varnishes, paints and spirits as well as gaseous fires like LPG and Acetylene. CO2 is a stored in liquefied form at a pressure of 800-900p.s.i. CO2 gas liquefies at 780p.s.i. at temperature below 88F (31 C) at temperature above 88F (31 C) CO2 is in gaseous state.

The cylinders for CO2 extinguishers are made of seamless Manganese steel. As they hold compressed liquefied. CO2 at high pressure they come under the gas cylinder rules. Each cylinder must be supported by a certificate from the Chief Controllerate of Explosives. Each cylinder is pressure tested to 3360p.s.i. (240kg.cm2) before filling.

CO2 gas is discharged as a dense white cloud. This is because liquefied CO2 on contact with atmospheric air cools to - 110 F (Approx. 43Deg.C) as it changes to gaseous state, as it acquires heat from itself to convert from liquid to gaseous state. About 30% of the CO2 changes to 'Dry Ice' which sub-lines eventually to CO2gas. To prevent frostbite to the operator, insulated horn is used in these Appliances.

CO2 gas being 1.5 times heavier than air is directed as close to the base of the fire as possible. It displaces air to settle at the bottom thus choking of the air supply. A continuous discharge of CO2 gas is an extremely effective fire killer. It dilutes the oxygen content of the air from 20% to below 15% thus preventing combustion.

CO2 can be used to fight almost all fires except reactive metals that decompose CO2 gas, or materials like cellulose nitrate which have their own oxygen supply. CO2 is a clean agent and leaves no trace hence is good for laboratories, libraries, Museums, Computer Rooms where damage to delicate or precious items has to be minimized.

As the discharge time is very short maximum closeness to the base of fire is essential to smother flames. The discharge is directed at an angle of about 45 towards the center of the burning area. Discharge should be continued even after extinguishing the flames to cool all the substances below ignition temperature and prevent re-ignition. Above a  concentration of 9% is an enclosed area, inhalation of CO2 will cause unconsciousness and death due to oxygen deficiency. Personnel should be evacuated and exits opened as far as possible.CO2 gas being heavier settles in  adjacent lower level areas like stairways landings, basements which again will are hazardous for personnel  due to lack of oxygen.

Friction between non-conductive CO2 gas escaping from the insulting Horn causes very high static electricity build up on the 'Dry Ice' could of CO2 which may cause a mild electrical shock to the operator. In very dry atmosphere an  explosion due to static electricity may occur.

Manufactured and marked to INDIAN STANDARD IS :2878 Equivalent British Standard :5423 Cylinders and valves approved by chief controller of explosives. They are suitable as first-aid appliance for fighting fires in class 'B' and 'C' i.e. flammable liquids and gases.

Manufactured and marked to INDIAN STANDARD IS :2878 Equivalent British Standard :5423 Cylinders and valves approved by chief controller of explosives. They are suitable as first-aid appliance for fighting fires in class 'B' and 'C' i.e flammable liquids and gases.