Sprinkler aup. Sprinkler fire extinguishing - the main characteristics of the system. Water mist fire extinguishing installations

No one would argue with the assertion that fire is one of the worst disasters that can happen in life, since its consequences are rarely minor. The task of automatic warning and fire extinguishing systems is to prevent a fire or its spread in order to protect the life and health of people, as well as material values and equipment. Nowadays, one of the most common are automatic sprinkler fire extinguishing systems, which will be discussed in this article.

In accordance with regulatory documents automatic installations extinguishing a fire should be provided in buildings of a certain purpose. These include various production, administrative and public buildings with a large crowd of people, the installation of such systems in private construction is not provided for by the norms. Despite this, some homeowners still equip their homes with fire alarms, or even fire extinguishing. For this, a sprinkler and deluge system is used, extinguishing the flame with water or other liquid formulations or gases.

The deluge scheme is designed to extinguish a fire in large areas with a large amount of water, therefore it is most often used in case of a fire to cool various dangerous objects that can easily ignite or in order to create between the fire and the rest of the room water curtain... The volume of water supplied per unit of time by the deluge system is so great that the consequences of its operation can exceed the damage from a fire. The peculiarity of this method is that fire pipelines are filled with water only after a fire, by a signal from an automation system or from a manual activation.

In turn, a sprinkler fire extinguishing system is a network of pipelines with water sprayers installed on them that operate locally. Its main difference from the deluge one is that each water sprinkler (sprinkler) operates independently in automatic mode if there is a certain temperature in the area of its location. Thus, in the event of a local fire in the room, one or more sprinklers located in the high temperature zone will work, this is the principle of operation of the sprinkler fire extinguishing system.

Sprinkler system device

In a typical heated building, the piping to which all sprayers are connected are constantly filled with water or other pressurized compound. It is provided by a special pump, and in case of fire, it will pump water from the water supply network to maintain pressure or fire tank... In accordance with the norms, for these purposes, at least 2 or even 3 pumps are provided, one of which is working, and the rest are backup.

In unheated structures, the sprinkler installation provides for the emptying of the network in winter time... To avoid freezing of water in the pipelines, they are filled with compressed air, which is quickly discharged from the system after the automatic valve is triggered during a fire, and the pipes are filled with a flame extinguishing agent. However, under such conditions, the time before the start of irrigation with water increases, which means that the probability of fire spreading increases.

Modern fire extinguishing systems can be turned on and by hand... This is especially true in buildings with high ceilings, where local fire does not always raise the temperature in the area where the sprinklers are located.

The tasks of calculating and designing these systems should be performed by specialized organizations that have all required permissions because the responsibility of this work is very high. As a rule, the following sprinkler systems schemes are used during development:

with overlapping irrigation zones;
without overlapping irrigation zones.

The first type of schemes is distinguished by reliable operation and involves the use of critical facilities, but requires a large number of sprinklers and, accordingly, water to extinguish the fire.

A scheme without overlapping zones also has the right to life, since it is more economical in installation and does not require a large water consumption.

The spacing between the nozzles is determined based on the selected layout, ceiling heights and device specifications. Typically, foam fire extinguishing sprinkler installations are located in the upper part of the room, under the ceiling, so that the flow of water or foam in the form of a torch is directed downward. However, there are also wall options sprinklers, they are used when too high ceilings industrial buildings or to protect valuable equipment. In addition, the circuits often involve the function of switching on at least two sprinklers in order to prevent false triggering.

Sprinkler design

As the name implies, water sprinkler fire extinguishing is based on the work of the main element of the circuit - the sprinkler. In simple words, this is a spray, equipped with a so-called thermal lock, which plays the role of a trigger. Usually, a glass bulb with a liquid or a fusible link acts as a thermal lock. In standby mode, the lock restrains a compressed Belleville spring, at the end of which there is a valve cover that blocks the path of water. The sprinklers themselves and their parts are made of non-ferrous metals that are resistant to corrosion.

Glass bulb or fusible link designed for a specific temperature threshold the environment... When this threshold is exceeded, the liquid inside the flask expands and destroys it, respectively, the fusible link loses its rigidity and the thermal lock opens. A spring is released, which lifts the valve cover and thereby opens up a stream of pressurized water. Further, the structure of the body ensures its high-quality spraying. At the same time, the water pressure in the system begins to decrease, which fixes the sensor and turns on the fire extinguishing pump.

Sprinklers for fire-fighting systems must comply with the following quality indicators:

Tightness. Since the device is constantly under high pressure, this indicator plays an important role. Leakage is unacceptable, because water can get on expensive equipment, documents, people, and so on.

Strength. A well-made sprinkler should not lose performance from external influences, such as high or low temperatures, the influence of aggressive media, and shock resistance. In addition, the outlet of the device must operate at a maximum pressure of the outgoing jet up to 1.25 MPa.

Reliable operation of the thermal lock. He must refrain from false switching on the sprinkler during sudden temperature changes.

Sensitivity and speed of response. For low-temperature sprinklers, the maximum turn-on time is up to 300 seconds, for high-temperature sprinklers - up to 600 seconds.

Irrigation intensity. This indicator should correspond regulatory requirements applicable to nozzles with different outlet diameters (from 8 to 20 mm).

Conclusion

As a method of local fire fighting, sprinkler fire extinguishing is the most effective, its work often prevents the intervention of fire brigades and, most importantly, harm to life and health of people.

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Hardly anyone will insist that there are things in the world that matter more than the well-being and health of the family. But only a few take certain measures to protect loved ones from one of the most terrible threats to life that has accompanied human life since ancient times. Of course, we are talking about fires, reports of which often appear in the news on TV and in the print press.

A sprinkler system will help to extinguish a fire, or contain it before the arrival of firefighters

Thousands of people are killed or severely injured each year as a result of fires, but most of them could have simply been avoided. All that is needed for this is to take some protective measures that can protect the owner of the house and his loved ones.

A sprinkler fire suppression system can save thousands, if not hundreds of thousands of lives.

Some of the owners of private houses and cottages are quite well aware of this problem, and therefore have installed smoke detectors for themselves. True, such equipment, although it saves people's lives, is not able to protect property and the house itself. So to protect the house and everything that is in it, something more serious is needed. We need a system that could, in the event of a fire, extinguish it or contain it before the arrival of firefighters.

Fire extinguishing systems are one of the solutions that could help keep the house without damage to the interior. The most popular sprinkler system is considered to be the most effective. It has this name because of the spraying devices - sprinklers.

How it works?

The basic principle of operation of a sprinkler fire extinguishing system is that the flame is eliminated by spraying water under the influence of high pressure... The main element and performer of the main work is precisely the sprinkler mentioned above. This is a spray head that is integrated into the fire extinguishing system and is most often installed on the ceiling. The system monitors the situation inside the room by means of installed sensors that determine the temperature and smoke levels.

Sprinkler is the most main element the entire fire extinguishing system

If there is a threat of fire, that is, sensors in the room detect smoke or an increase in temperature above normal, they transmit a signal to the control unit. The latter, in turn, activates the sprinkler fire fighting system, which extinguishes a fire by means of finely sprayed water. The disadvantages of such a system include a fairly large inertia of the sprayers.

System advantages

The main advantage of installing such a fire extinguishing system at home is obvious. After all, as soon as a fire breaks out in the room, the system will not only notify the owners of this, but also begin active defensive actions, allowing to keep property and housing from fire. Smoke detectors, while effective enough, leave many different possibilities for harm to property and people, as the situation here will be influenced by many factors. These factors are very difficult to control, and even more difficult to foresee. Among the most common reasons for the low efficiency of smoke detectors, it is worth highlighting:

the first factor is that it is not always possible for people to hear the alarm;
the second factor is that not all people can quickly leave a burning building. This applies more to the elderly, as well as those with disabilities.

In the latter case, even if a person hears a signal, he may not have time to leave the room. The installation of a sprinkler system can eliminate these disadvantages. After all, after the signal, the person has additional time. Also, quite a significant advantage of the sprinkler system is its use as extinguishing agent water that has high efficiency in this plan.

Water will quickly and easily extinguish fire flames

As a rule, water has low production costs. At the same time, this is the resource that is available in abundance almost everywhere. Another positive factor in favor of using water as a fire suppression agent is its non-toxicity. Considering that an ordinary sprinkler system is used drinking water, which is supplied to the taps in the bathroom and in the kitchen, the sprayed liquid will not harm the human body.

Modern systems

Per last years sprinkler household systems have gone through many improvements. Today, sprinkler fire extinguishing systems are designed in such a way that they can work as efficiently as possible when needed. V modern system used by plastic pipe, which, without loss of quality and efficiency, helps to reduce installation costs, and also greatly simplifies this process.

There are such systems that practically do not harm all objects inside the room, even those made of paper or wood.

Now manufacturers began to understand that no one is forcing them to make sprinklers. standard view that have been used at all times. So now on the market there is a large assortment of different nozzles, from which you can choose an element that does not harm the interior. Many homeowners do not install such a system in their home only because of the opinion that at the moment the alarm is triggered, all sprayers are activated at the same time. This principle of operation is ineffective, because it can harm the premises and all the property in it.

A modern sprinkler system involves the activation of only those nozzles that are located very close to the source of the fire. That is, the effect of water occurs only on the ignition area, so that Negative influence from liquid is minimized. You must always remember: the harm from water is many times less than the consequences of a fire that has arisen due to the absence of a fire extinguishing system. Moreover, even from a fire hose, the harm will be much greater than from the work of sprayers.

Air based sprinkler systems

Air-water systems of this kind are intended for extinguishing fires in rooms without heating. All pipelines of the system located above the shut-off and starting unit are filled with air in the cold season, and with water in the warm season. These sprinkler systems are divided into independent sections with up to 800 individual nozzles. When using special accelerators that bleed air from the system, this allows pumping up to 3000 liters of water.

The control and signal elements of such a system are somewhat different from those in the water system. This difference consists in the fact that the water-air system, during a fire, uses a group-action valve or an air-control valve as a control and signaling element. The accelerators used in such systems are a device for supplying compressed air to the cavity formed by the air and water control valves.

Water-air fire extinguishing system does not damage paper, wood and other similar materials with water

If the room has beamed or ribbed floors, then the supply pipes are located perpendicular to the main beams, while the distribution pipes are perpendicular to the secondary beams. This installation method greatly facilitates the process of installing and fixing pipes. This is very important, because the easier the installation process, the less money it requires.

Thus, sprinkler systems are effective tools for protecting people and property from fires. In addition, the use of modern controlled sprinklers allows not only to protect the building and property from fire, but also not to damage products made of paper, wood and other similar materials with water. This is achieved by activating sprays in a specific area, near the start of a fire. Truth, the effectiveness of such a system will directly depend on correct selection elements.

Sprinkler fire extinguishing systems are an economical and fairly simple way to provide maximum protection for life and property from fire. The advantage of such a system is the use of water as a means of fighting fire. This, in turn, makes it possible to assess the availability of using the system, because water is the most accessible resource that is available in most regions. So if you take care of installing such a system today, you can save lives in the future.

Man has always strived to achieve perfection in almost everything. The real confirmation of this is the progress in the technical field. Today it has reached a completely different level, higher Modern ways elimination of fire allows you to save the lives of people in certain rooms, as well as protect their property. One of the options for fighting a fire is the sprinkler system, which eliminates a fire immediately after it occurs. If the object is equipped with this method of extinguishing open flame, then you do not have to wait for the arrival of special services, as well as use fire extinguishers.

Varieties of fire-fighting water supply

Today, sprinkler and deluge systems are being created for the purpose. The first are air, water and mixed. These systems are designed to be installed in rooms with or without heating. In water installations, pipelines are completely filled with liquid. Therefore, such systems are used only in heated rooms. V air installations water enters the pipeline only after the control and signal valve has been triggered. They can be used in unheated rooms. The pipelines are initially filled, therefore, only after its release does the fire extinguish with water begin. Also for rooms that do not have heating, mixed systems are used. In such installations, pipelines are filled with water in summer, and in winter they contain compressed air, since the liquid freezes at low temperatures.

Deluge systems include heads that are equipped with holes with a diameter of 8, 10 and 12.7 mm. Such elements are used not only for, but also with their help, water curtains are created. They are designed to isolate fire sites. Such systems can be operated manually or automatically.

Features of the use of sprinkler-type installations

This kind of thing happens completely automatically. The sprinkler system is being built in large facilities. A feature of these installations is the localization of open flames in closed areas, where the spread of fire is accompanied by a large amount of heat release. Most often, this method is used in crowded places, in parking lots with closed type, in numerous offices, retail and industrial premises.

Principle of operation

From water supply networks any sprinkler fire extinguishing system consists. The principle of operation is that the installation is always ready to supply a substance that helps to eliminate the fire. It can be water or a special compound. The system operates under high pressure. Sprinklers are distributed over the entire area of a certain room, which are normally covered by sprinklers. They are special attachments made of light alloy material. When a fire breaks out, a high temperature is applied to the valve, which breaks the seal and supplies the extinguishing agent.

Design features

A sprinkler fire extinguishing system can consist of several separate sections. Each of them is equipped with an individual control and signal valve. Also separate section can be equipped with special devices that supply compressed air. This is necessary in order to increase the pressure in the pipelines. Such design features of fire extinguishing systems depend on the area of the object, as well as its configuration.

Types of equipment to be installed

Any sprinkler system has thermal locks. In most cases, they are triggered when the temperature reaches 79, 93, 141 or 182 degrees. The first two values refer to low temperature systems... They must be triggered no later than 300 seconds after a fire breaks out. This requirement is specified in GOST R 51043-2002. The following two values refer to high temperature systems. For them, the thermal lock should work no later than 600 seconds after the ignition started in the room.

Design and installation of a sprinkler fire extinguishing system

Initially, it is always necessary to complete the project. It will be needed for the correct placement of the equipment and pipelines of the fire extinguishing system at the facility. When developing drawings, the area of a specific room is always taken into account. It is also necessary to take into account the consumption of the substance required to extinguish the fire. Depending on the type of room, the location of each element of the system is determined, which are sprinklers, pipelines, and also the control unit. In this case, the height of the ceilings, the existing ventilation and the parameters at which the water supply will be carried out must be taken into account.

The installation of a sprinkler system consists of several stages. All are delivered to the site first. necessary materials and accessories. Then the cables are laid and directly the pipelines of the system themselves. Further, the installation of other elements that are part of the fire extinguishing installation is carried out. At the last stage, commissioning tests are carried out.

Main element for fastening pipes

Sprinkler piping is suspended from horizontal surfaces. These are mainly the ceilings of the premises. For simplicity, a sprinkler clamp is used. Appearance such a device has a teardrop shape. Clamps are made, as a rule, of galvanized steel. They have different diameters, depending on the dimensions of the pipes used in the systems. There is a special hole in the clamps for fixing them to the ceiling. To carry out such a process, it is necessary to insert a threaded rod, which will be fixed with a nut. When using this installation method, it is possible to adjust the level of the pipeline. Usually, the required number of clamps is initially installed on the ceiling, after which the system itself is installed. Thanks to the use of such elements, the installation of pipelines is very fast. Clamps can be fastened using various means - they can be pins or threaded studs.

Maintenance of installations

The sprinkler system, like any other, needs regular maintenance. He has great importance to keep the installation in working order. One of the main elements are sprinklers, which must be constantly checked for physical damage. It is necessary to ensure that they do not have leaks, and also that there should be no traces of corrosion and destruction on such elements. If defects are nevertheless found, then it is imperative to replace the thermal locks, while the liquid is completely drained. After all work has been completed, the system is restarted. Also, the owner of such installations needs to know that their trouble-free operation is possible for 10 years after installation.

Sprinkler system efficiency

Currently, in order to obtain reliable information about the operation of any equipment, they collect information from which statistics are formed. According to the latest data, a sprinkler fire extinguishing system effectively fulfills its tasks if at least one sprinkler is triggered in 10-40% of possible cases. Up to 80 percent of fires can be eliminated by simultaneously activating 10 valves. Moreover, such efficiency is observed over a large area. After completing the installation of the sprinkler system on site, the owner of the premises will use a minimum amount Money... As a result, he will receive a fire extinguishing installation that will fully operate in automatic mode. At the same time, it does not depend on the connection to electrical network... All the listed advantages allow the sprinkler installation to occupy a leading position among all existing fire extinguishing systems.

At all times, the health and safety of human life have been at the forefront. To achieve this, today it was invented a large number of special means and systems that make everyone feel completely safe. However, there is an enemy that is the most dangerous. Moreover, it is capable of taking the lives of a large number of people in an instant. What is this enemy?

It's about fire. Millions of people are killed or seriously injured every year from fires. In this regard, many systems have been invented that allow you to maximally protect people from fire. One of these modern and effective means is a sprinkler fire extinguishing. What makes it so effective? How does it work? You can get answers to these and other questions in this article.

Effectiveness of action

Unlike most conventional systems fire extinguishing, sprinkler differs significantly in the composition of parts. Moreover, its productivity and reliability also lie in its long service life. To extinguish the fire, mainly water is used, the supply of which is carried out from the water supply system.

To maintain a constant pressure in the installation at a given level, a special system has been developed check valves... Therefore, if the system even on a short time there is no pressure, the installation will work, since sufficient pressure will be present in it itself.

Undeniable advantages of sprinkler fire extinguishing:

This system works effectively within 12 m 2 of the serviced premises. Long-term operation of the sprinkler system is ensured by the fact that, if necessary, one or more devices are triggered, thereby maintaining a stable pressure.

But, despite all the advantages, such an installation also has disadvantages:

it depends on the total air temperature;
dependent on the water supply system;
unsuitable for extinguishing electrical networks;
inertia of operation.

However, despite the disadvantages, such a system works without human intervention, completely in automatic mode. Moreover, it extinguishes not only the fire site, but also wets the surrounding objects. For this reason, sprinkler fire extinguishing is the most effective today.

Principle of operation

The sprinkler system works according to the following principle: the flame is localized by means of high pressure water spray. Sprinklers are one of its main elements. A sprinkler is a head that mounts directly into a fire extinguishing system. In most cases, it is mounted on the ceiling.

To monitor the situation in a specific room, sensors are additionally installed. Their purpose: to determine the level of temperature, as well as the level of smoke. If there is a risk of a fire, these sensors quickly detect a violation of the norm, record the degree of temperature rise and smoke.

Then the signal is immediately transmitted to the main control unit. Then the sprinklers are activated, which eliminate the fire by means of sprayers with thin jets of water.

Over the past few years, the performance of the household sprinkler system has undergone many improvements. For example, today's system uses a plastic pipe.

It helps to reduce the cost of assembly work, which greatly simplifies this process. At the same time, the efficiency and high quality of work does not deteriorate, but, on the contrary, improves.

Some of these systems are designed in such a way as to cause minimal damage to the property that is inside the premises during operation. Even those items that are made of wood, cardboard or paper!

Sprinklers are available today in a variety of standards. Manufacturers understand this well: after all, every user would like to have a system that will cause minimal harm to the overall interior.

General scheme of the functioning of the sprinkler fire extinguishing system.

Many people have a misconception about how this system works. They believe that when an extinguishing signal is triggered, all sprinklers will automatically turn on, and this is undoubtedly causing damage to property. Therefore, the fire extinguishing system was developed so that only those sprays that are as close as possible to the fire source were triggered.

Therefore, all speculation about its ineffective work can be completely discarded. After all, if you extinguish a fire with a cannon, the damage to property, of course, will be done more than from a sprinkler stationary fire extinguishing installation, the principle of which is spraying water.

System Requirements

It should be noted that all installation work, as well as the choice of equipment, must fully comply with the standards set forth in the SNIP. For example, some systems operate at 79 ° C, 93 ° C, 141 ° C, and 182 ° C. The sprinkler response time at 79 ° С and at 93 ° С is allowed up to 300 seconds, and at 141 ° С and at 182 ° С - up to 600 seconds.

Therefore, for the stable and correct operation of the installation, it is imperative to carry out its regular maintenance. Moreover, even if the system is working properly, it is not allowed to operate for more than ten years from the date of production.

As for the application of the sprinkler system, it is mainly used in commercial, administrative and industrial buildings. However, in some cases, it is installed in residential buildings, but this is done solely at the request of the owners.

Directly during the design of the system, engineers, in accordance with the SNIP, decide which vertical and interfloor floors will serve as a fire barrier.

That is, the whole house is divided into compartments, within which the fire localization will be carried out. Such calculations will make the installation most useful.

When designing and installing the system, the distance between the heads is carefully maintained. So, the range of one is equal to two meters. According to SNIP, the installation of sprinklers in residential premises is carried out at a distance of no more than 4 meters from each other.

Another norm for the use of a sprinkler system in accordance with SNIP is installation in a building with an area of 75 m 2 or more (for example, a 25-storey building).

To prevent the penetration of fire through cavities, developers must adhere to SNIP 21-01-97, namely: mount automatic devices in the form of couplings and sleeves in those places where the intersection of the pipeline of the fire barrier is carried out. They are installed in ceilings or in other places of the pipeline, which consist of several layers.

At the moment when the temperature rises due to fire, one of the layers expands and fills the void that has formed as a result of the plastic pipe.

So, subject to all the norms and requirements of SNIP, you can create an excellent and efficient sprinkler system that will be effective in short time eliminate fire.

Features of installation work

The installation of this system is carried out on rubber clamps, which are fixed to the ceiling every one and a half meters. After that, all pipes and fittings are welded, which are mounted according to the calculations of the drawn up project. In order for water to enter the fire extinguishing system, it is used pump equipment... For the purpose of improvement, an additional pump (so-called standby) is installed.

Also follows the installation of a water tank with a capacity of 8 thousand liters. This volume of water is enough for continuous operation of the system for 30 minutes. After that, the installation of the main automatic sprinkler system, namely, its unit, is carried out. This node has a fairly simple principle of operation.

The system uses a special flow switch. When the sprinkler is triggered, water begins to spray under pressure. Accordingly, the pressure drops in the pipeline, after which this flow switch is triggered, which turns on the pumping equipment. At the end of the work, sprinklers are mounted.

Sprinklers or drenchers?

In addition to the sprinkler, today there are several other types of fire extinguishing installations, for example. Unlike its counterpart, the deluge is equipped with a sprayer with open inlets. In this case, there is no need to use a thermal lock. The system starts working the moment it is triggered fire alarm... This is done automatically or using manual remote settings.

Sprinkler fire extinguishing works on a slightly different principle. As mentioned above, this is a piping system that is filled with water at the appropriate pressure. It is also equipped with irrigation heads. The opening in the sprinkler head is closed with a heat seal. Its unsoldering is carried out as soon as the temperature exceeds a predetermined limit. As a result, the fire is localized.

As for the customer - the owner of the building, investor, developer or subcontractor of the construction organization, and the contractor - a specialized enterprise performing design, installation, maintenance (AUPT), in addition to the cost, efficiency of the installed equipment, reliability is extremely important, a guarantee that the system will not work when normal operating conditions.

That is, suddenly without any external causes- the appearance of smoke, fire, high temperature, will not flood with water or foam, will not fill with the smallest, into everything that eats, powder everything acquired by hard work: furniture, important accounting documents, goods, valuable, including electrical, equipment; raw materials, finished products that are afraid of moisture. In general, the realized nightmare of the owner and the installation and commissioning / maintenance organization, which suddenly found themselves in the same boat of material and financial, reputational losses, was realized in practice.

Views

Such devices have been used since the end of the 19th century, naturally, having undergone significant changes in design features, materials for manufacture, types and types, depending on where and for extinguishing what will be used:

General purpose

It is mounted on the distribution lines (pipelines) of the water AUPT, laid, as a rule, on the ceilings, less often on the walls of the protected premises.

Hidden

Designed for flush installation in suspended / stretch ceilings or Wall panels premises with increased requirements for finishing, interior design. Therefore, the openings in the ceilings / walls are additionally covered with thermosensitive decorative covers. In addition, there are in-depth, secret methods of installing sprinkler sprinklers that are used for similar purposes.

For foam fire extinguishing

Used to protect premises with high fire hazard, the presence of flammable liquids, combustible liquids, polymer, rubber products - industries, workshops, sections, warehouses.

For water curtains

Protecting open construction, technological openings, arches, atriums of buildings; dividing premises of a large area into fire compartments.

For fire extinguishing installations

Selection of a sprinkler fill suitable for technical specifications, is carried out at the design stage based on calculations of the required water consumption, system performance, fire extinguishing time. Only enterprises / organizations that have valid licenses of the Ministry of Emergencies of Russia, SRO approvals (design) have the right to design, install, commission, and service, replace, repair equipment for sprinkler water / foam AUPT.

Foam and water

If the main document regulating the design standards of AUPT - allows you to make a choice between the type of fire extinguishing installation, which directly depends on how fire hazardous the situation is at the protected object (properties of substances / materials, technological process, equipment, storage volumes of raw materials, finished products), then the specialists of the design organization often give preference to those systems where foam sprinkler sprinklers or their equally effective "brothers" - sprinkler water sprinklers ... The choice between them depends on the specific situation.

It is worth figuring out what caused this preference, for example, over deluge sprinklers, which are also quite often used in the composition of water, foam AUPT.