To extinguish fires and prevent their spread, a powder fire extinguisher OP-8 of the pumping type is used. They are used to complete fire shields, cabinets. It is possible to install on the floor in a special stand.
Characteristics of the fire extinguisher OP-8
ABCE powder is used as a fire extinguishing agent. Submission is made within 15 or more seconds. Depending on which powder is filled, OP-8 is used to extinguish fires that belong to the following classes:
A (solids);
B (liquid or fusible substances);
C (flammable gases);
E (electrical installations whose voltage does not exceed 1000 V)
This type of fire extinguisher is not suitable for extinguishing substances that burn without oxygen (for example, alkali and alkaline earth metals). This is due to the fact that the action of the fire extinguishing powder is to knock down the flame mechanically, while air is removed from the combustion zone.
Fire extinguisherOP-8 has a number of advantages:
- Fires instantly when the lever is pressed.
- High fire extinguishing capability.
- Economical (small cost for total fire area that can be extinguished).
The OP-8 fire extinguisher is 505 mm high and 175 mm in diameter. Its mass is 12 kg with a charge mass of 8 kg. This is enough to put out a fire in an area of up to one hundred square meters.
You can operate at a temperature range from minus 50 to plus 50 degrees. Service life 10 years. But after 5 years, the OP-8 powder fire extinguisher must be recharged. The gas pressure is checked by a manometer.
Design of powder fire extinguisher
Fire extinguishers are made in the form of a welded cylinder made of steel. A locking device with a siphon tube is installed in the neck. A hose with a socket is attached to the locking element.
Extinguishing powder can be fired at once or in batches. This is possible thanks to the valve in the head.
The OP-8 fire extinguisher is equipped with a manometer at the top, which indicates operability (for this, the arrow must be in the green sector).
Operation principle
The operation of the powder fire extinguisher OP-8 is based on the release of the powder from the cylinder due to the pressure of the displacing gas. The gas in the cylinder is under pressure of 0.4-1.6 MPa.
In the event of a fire fromfire extinguisher pulls out the check. The bell must be directed towards the fire. After pressing the lever of the locking element, you can start extinguishing.
To extinguish a fire, it is necessary to create a cloud of powder of a certain concentration around the fire. In addition, this cloud protects from high temperatures, so you can come closer to the fire. Do not put out a fire at very close range. A powerful jet can scatter the burning substance to the sides, thereby only aggravating the situation.
Do not get close to the fire at the beginning of the extinguishing. Due to the high pressure of the powder jet, oxygen is sucked in at the first moment to the source of ignition, while the fire swells.
