Fire extinguisher OU-2: specifications, description, expiration date

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Fire extinguisher OU-2: specifications, description, expiration date
Fire extinguisher OU-2: specifications, description, expiration date

All kinds of devices are used to fight fires. However, the most popular and common is the fire extinguisher. They come in various types and perform various functions. In this article, we will look at the OU-2 fire extinguisher: specifications, expiration date and description.

What is it?

carbon dioxide fire extinguisher

The OU-2 fire extinguisher is carbon dioxide, which, in principle, is indicated by its license plate. It is suitable for extinguishing in the following situations:

  • when igniting substances that cannot burn without oxygen;
  • fire of electrified rail and urban transport;
  • fires at electrical installations, with a power of not more than 10,000 W;
  • fires in museums, art galleries, archives or libraries.

In the above situations, the technical characteristics of the OU-2 carbon dioxide fire extinguisher are responsible for the efficiency of its operation.The most important advantage of this type of units is that they do not damage the object of combustion during the extinguishing process. In addition, there are no traces of its use at all.

The description of the OU-2 fire extinguisher indicates that it is not effective in fighting fires of substances that can burn without oxygen. These substances include aluminum, magnesium, sodium, potassium, as well as all kinds of alloys based on these substances.

Operation principle

fire extinguisher OU-2

Carbon dioxide fire extinguishers are arranged as follows. During operation, carbon dioxide is emitted. This is due to the pressure in the balloon. It is created by saturated carbon dioxide vapor. OTS, (fire extinguishing agent), when it enters the fire, reduces the amount of oxygen, thereby cooling objects and stopping combustion. That is why this type of fire extinguisher is used to extinguish fires caused by the ignition of substances that cannot burn without oxygen.

Fire extinguisher OU-2: specifications

fire extinguisher passport

The body capacity of this type of fire extinguisher is at least 2.68 liters. This is indicated by the number 2 in the license plate of the unit. The mass of the carbon dioxide charge is 2-0.10 kg. Class B model hearth, must be at least 21V.

The temperature range at which the use of this type of fire extinguisher is permissible is from -40 to +50 degrees Celsius. The length of the GPV jet ejection is about 2 meters. In this model of fire fighting device, the presenceflexible hose not included.

The pressure inside the case is 5.88 MPa. The technical characteristics of the OU-2 fire extinguisher also provide for a possible leakage of the contents of the cylinder. It should not be more than 50 g.

The continuous OTC supply time during use is about 6 seconds. This device weighs approximately 7.7 kg. Manufacturers indicate that the shelf life of the OU-2 fire extinguisher is approximately 10 years.


The manufacturers of these products claim that, in all respects, fire extinguishers of the OU-2 brand comply with the requirements of GOST 51057-2001, subject to all necessary regulations regarding use and storage.

Guarantee for the buyer is 1 year from the date of purchase of the fire extinguisher. However, this does not apply to a product that is one and a half years old or more from the date of manufacture.

Maintenance of the unit, namely its recharging, should be carried out every five years.

It is worth paying your attention to the fact that all products of this kind must be certified. After all, many lives can depend on this device.

Using the OU-2 fire extinguisher

fire extinguisher specifications

Given the technical characteristics of the OU-2 fire extinguisher, there is a certain order for its use:

  • It is necessary to bring the device to the source of ignition. At the same time, it is important to maintain a safe distance for extinguishing a fire.
  • Next, you need to pull the pin.
  • Flarer (tapered extension inthe top of the fire extinguisher) is directed at the flame and at the same time the handle of the valve of the locking mechanism is pressed.

If you have to put out a fire in an open area, then it is important to pay attention to which side the wind is blowing. In order not to inflate the flame even more, extinguishing is carried out only from the windward side.

It is also worth paying attention to the fact that during the operation of the device, its temperature may drop to 60-70 degrees Celsius. This is due to the release of OTC and a sharp decrease in pressure in the unit.

Also, be careful as electrostatic stress can build up on the flare surface. Its concentration is such that it can penetrate a dielectric glove.

When extinguishing a fire in places connected with electricity, it is not allowed to bring the socket to the flame closer than 1 meter.

Operating Rules

date of manufacture on the fire extinguisher

Usually, the warranty period is specified in the technical characteristics of the OU-2 fire extinguisher. It is 24 months from the date of acceptance of the QCD. This period also includes the storage period of the unit.

Portable fire extinguishers should not be placed near heating elements. You also need to make sure that the sun's rays do not fall on it. In general, the fire extinguisher must not be exposed to heat or other mechanical stress that could damage its integrity.

In order to avoid a malfunction of the fire extinguisher at the right time, it is checked. It should be carried outonce every six months. During this procedure, the tightness of the cylinder and the compliance of the weight with the initial technical characteristics of the OU-2 fire extinguisher, stated in the device passport, are checked. If there are any discrepancies, then the cylinder is sent to a specialized station for testing and recharging.

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