In everyday life, we try to equip each room as comfortably as possible. We rarely remember security issues. Today fire extinguishers are not found in every apartment, but it is worthwhile to think about the likelihood of fire in the kitchen, because the stove and wiring are often the causes of the fire. In this article, we will look at how to use a powder fire extinguisher.
What extinguishes the powder fire extinguisher?
This type is used for primary fire fighting in household conditions of Class A fires (solids), B (melting solids or flammable liquids) and C (combustible gases). Also for the purpose of powder fire extinguishers are electrical installations that are under voltage up to 1000 V.
Powder fire extinguishers are recommended for use in passenger cars or trucks, to complete fire protection panels at various chemical facilities, as well as to extinguish equipment at enterprises, offices or household facilities.
Principle of powder extinguisher operation
The work of this fire extinguisher is based on the use of compressed gas energy, which displaces the extinguishing agent. This working pressure is monitored by means of the indicator scale: on the green field this pressure is normal, when the needle hits the red field the pressure is lowered.
If everything is normal, then when pulling the checks send the nozzle or sleeve to the fire, then press the handle of the trigger. This opens the gate valve and, under the influence of pressure, the contents of the extinguisher through the siphon tube is fed to the place of fire.
Rules for the use of a powder fire extinguisher
Always avoid mechanical damage to the housing. When working, never direct the jet toward people standing close by. Preliminary it is necessary to check the pressure level. Do not expose moisture or direct sunlight to powdered fire extinguishers. Also, do not place the housing near heating appliances.
Before using a fire extinguisher powder, you need to check the presence of a check, it must necessarily be sealed. If everything is normal, pull out the check and direct the jet to the fire. If necessary, it is possible to close and open the exhaust valve many times.
Always check the expiration date of the powder fire extinguisher. If it has been stored indoors for a long time, it may not work if necessary. Every year you need to do technical diagnostics, recharging.
Composition of powdered fire extinguisher
Powders consist of finely divided mineral salts with the addition of special substances that prevent caking. For extinguishing, carbonates and potassium bicarbonates, potassium and magnesium chlorides are used. As additives from caking, nepheline, organosilicon compounds and metal stearates are used.
In various archives or museum do not recommend the use of powder self-operated or any other fire extinguisher because the composition of the powder is very difficult to wash off the surfaces after extinguishing.
Powder fire extinguisher system
Any model consists of a steel cylinder, a shut-off device, a hose, a pressure indicator, a nozzle and a siphon tube. The body and the trigger device start the gas generator. After clicking on
The type is selected according to the technical characteristics of the powder extinguishers. They include fire-extinguishing capacity, cylinder weight, overall dimensions, operating pressure and time of supply of OTD. Also in the technical characteristics of powder fire extinguishers is indicated the type: portable, mobile. For each object there are recommendations for choosing a particular type.
Another type of fire extinguishers are carbon dioxide models.