How to bleed air from a bimetal battery. Removing air from the heating system: how to release the airlock

The coolant provides us with heat during the cold season. However, situations often arise in which the battery does not warm up completely. They arise due to the accumulation of air in the far part of the radiator, which prevents the radiator from filling hot water. Therefore, it needs to be removed somehow. For this purpose, a Mayevsky valve is used, the operating principle of which is based on bleeding air pockets when the shut-off cone valve is loosened.

The Mayevsky tap is installed at the top point of the heating radiator. It can be controlled automatically or manually. When the valve is opened just half a turn, the air in the system comes out of it, freeing up space for the coolant. This device is used on all types of radiators, including old ones.

Air locks inside the heating system inevitably appear in the following cases:

• when a new heating system is being installed;
• in case of repair of the system and removal of water from it;
• when installing new radiators;
• when air is sucked into the system during its operation;
• when there is a gradual release of air bubbles from the water, which is a natural physical phenomenon;
• in the presence of corrosive processes, which are accompanied by the release of a certain amount of air. Aluminum heating radiators are especially susceptible to such processes in city apartments.

Design and operation of the Mayevsky crane

The classic Mayevsky tap is made of brass alloys that are resistant to corrosion. It is a housing containing a cone needle valve inside. Controlled this valve Mayevsky with a locking screw adjustable from the outside. When in the closed position, the valve is able to reliably hold the coolant inside the radiator. When the screw is turned to the side, the passage hole of the faucet opens, releasing the air inside the heating device.

Outside metal case there is often a white plastic casing, giving the faucet a more noble and modern look. The design of the product may differ in its individual modifications, but the principle of operation of the Mayevsky crane always remains unchanged. Devices differ in diameters external thread , thanks to which you can easily select suitable option for any radiator. There are taps with 1 inch, ¾ or ½ inch threads.

To control the adjusting screw, use a key for a Mayevsky tap or a regular screwdriver. A square wrench is convenient because it takes up little space, allowing you to control the adjusting screw even if the radiator is in a hard-to-reach place.

In some cases, the operation of the crane can be controlled without the use of tools at all. To do this, just turn the valve by hand, ensuring that the air begins to bleed.

Varieties

There are three types of air vents, differing in operating principle and design:

1. Mayevsky manual crane. This is the simplest device that is controlled in manual mode. If uneven heating of the radiator is detected, the tap can be opened with a key or any screwdriver, and then, as air leaves the radiator, turn the tap in the opposite direction.

2. Automatic crane. The difference between an automatic crane is the absence manual control his work. Its design and operating principle are somewhat different from the operation manual tap. An automatic faucet is made of brass in the form of a cylinder, but there is no needle valve in its design. Instead, a plastic float is used. How does the Mayevsky crane work? automatic control? A plastic float, depending on the presence of air in the system, moves inside the tap and controls the opening and closing of the valve. Everything happens without human intervention.

The principle of operation of the Mayevsky automatic crane is visually demonstrated in the photo above.

All automatic taps have the ability to be manually controlled, which can be used when the passage opening becomes clogged.

3. Faucet with built-in safety device . For this type of Mayevsky crane, the principle of its operation is somewhat different from the usual bleeding of air. The safety valve is able to control the coolant pressure in the system. If the coolant pressure exceeds the limit value, reaching 15 atmospheres, the valve will operate and begin to forcibly bleed the coolant from the heating system. This prevents damage individual elements system in case .

It is especially important to install air vents with safety valves in heating systems made of polypropylene and metal-plastic pipes, which may not withstand increased pressure.

Features of choice

When choosing a device model, you should consider some features of radiators:

How to install a Mayevsky crane

The installation of the tap must be carried out in the upper part of the radiator device on the side opposite to the flow of coolant, since it is in this place that air collects. The specifics of each system should be taken into account. If a vertical heating system is installed in the house, then Mayevsky taps are installed on the radiators of the upper floor. In addition, air vents are installed on all heating devices that are connected to the riser below the upper connection axis.

Using horizontal system taps are mounted on everything without exception heating devices, on which their connection is possible.

If the Mayevsky crane is installed on floor radiator, located horizontally and parallel to the floor surface, it is placed at the top of the highest point of the radiator. The adjusting screw points upward.

Many bathrooms have heated towel rails, which are heated by the coolant circulating inside them. On such devices a Mayevsky tap is installed for a heated towel rail. Installation has some peculiarities. If the heated towel rail has bottom connection, then there is already a place for it to screw in the tap. But for models having side connection, needs to be improved. A tee is cut into the supply pipe, into which the tap is screwed. The air outlet should be directed away from the wall. It is advisable to equip some models of heated towel rails with even two air vents.

Procedure for installing a tap on a radiator

1. Before installing the faucet, it is necessary to drain the water from the system.

2. Unscrew the plug located in the upper part of the radiator.

3. Screw the tap into place of the plug. IN standard The tap is equipped with a rubber gasket to ensure the tightness of its installation. For a more reliable seal, it is recommended to screw FUM tape or oiled flax fibers onto the threads of the tap.

If a tap is being installed on an old cast iron battery, which does not have a hole, then the following modification is performed. A hole is drilled in the cast iron plug, which has a slightly smaller diameter than the tap thread. The thread is cut inside the cast iron plug. After this, the air vent valve is fitted and screwed in.

Features of operation

Let's look at how to use the Mayevsky crane. To do this, it is advisable to place some kind of container under the battery and stock up on a dry cloth. Using a wrench or screwdriver, turn the locking screw counterclockwise a quarter or half a turn. Air will begin to hiss out of the system. When it comes out completely, water will flow from the tap. You must wait until the water starts flowing continuously. After this, the locking screw can be tightened.

If the air was successfully bled out, but the battery remained cold, then this is a sign of clogging. To clean a clogged battery, you will have to resort to the help of plumbers.

Tip: If the heating system includes pumps that force the coolant to circulate, they must be turned off 10 minutes before bleeding the air. When the pumps are turned on, air will not accumulate at the top point of the radiator, but will be carried throughout the system by the flow of water.

If the tap hole is clogged, it can be cleaned with a needle or other sharp object.

If the faucet has not been used for a long time, the rotation of the adjusting screw may be difficult due to the formation of corrosion on it. If this situation occurs, use WD-40 lubricant spray. Within a few minutes after applying it to the screw thread, it can be easily unscrewed. At the end of the heating season, it is advisable to lubricate the adjusting screw with silicone grease. In this case, the thread will not be destroyed by the influence of the coolant on it.

If you need to replace the Mayevsky tap, use two adjustable wrenches. Use one key to hold the cap on the radiator, and the other to unscrew the tap. If this is not done, then unscrewing the tap may weaken the plug and lead to loss of its tightness.

We looked at how to bleed air from the system using a Mayevsky valve yourself and how to operate an automatically controlled device. If provided necessary care this device, check and clean it in a timely manner, the device will serve for a long time without causing any problems to its owners.

The price of a Mayevsky crane depends on its type, material of manufacture, diameter, and starts from 30 rubles.

This article is about how to remove air from your heating system and how to prevent it from re-airing. In it I will talk about solutions for different heating schemes and different levels of reader qualifications, about the causes of air locks and the prevention of their formation.

Why is this bad?

1. What is the harm of an air lock in a water heating circuit?

The main danger is that it can completely stop circulation in the entire circuit or in its individual section. Pressure drop in a typical heating system apartment building between the mixture after the water jet elevator and the return (that is, at the beginning and at the end heating circuit) does not exceed 0.2 kgf/cm. On a separate riser, it even corresponds to a pressure of a few centimeters of the water column.

This difference is not enough to overcome the difference in density of air and water. As a result, the top of the riser remains airy, and coolant circulation in it is impossible. The consequences are a lack of heating in apartments, and at the very first serious frosts, a section of the heating circuit defrosts.

Moreover: in the majority apartment buildings Soviet-built heating systems are still used in black steel. Its contact with air in conditions high humidity sharply reduces the life of the pipeline. Corrosion, you know.

Where does the air come from?

1. Where do airy batteries come from? Shouldn't the circuit be filled year-round?

Must. There are strict instructions on this subject from Heat Networks, which are responsible for the operation of the central heating system.

Only - that's the problem! - in addition to instructions, there is also a harsh reality:

• Summer is the time for inspection and repair of shut-off valves on risers and elevator units. Filling the circuit and bleeding air from each riser after replacing each valve and flushing the housing organization will simply go broke paying for water consumption if this is done;

Summer is the time to inspect heating shut-off valves.

• Residents of apartments during the holidays are often puzzled by replacing and moving radiators. At the same time, they also dump risers, or even the entire house;
• When the valves are closed and the circuit is cooled, the volume of coolant in it decreases. Physics, however. As soon as you open any valve, the riser will noisily suck in air;
• Finally, after heating has stopped, cooled cast iron radiators often begin to leak between sections. The reason is the same thermal expansion. After the tenth or fifteenth leak in one entrance, the mechanic is faced with a difficult choice: spend the whole summer rebuilding batteries and replacing gaskets, or simply reset the circuit for the couple of months remaining until the fall.

How to play off

The method by which the heating circuit is ventilated predictably depends on two factors:

• From its configuration. Bottom and top filling systems are designed differently;
• Depending on who you are - a tenant of one of the apartments or a mechanic servicing an apartment building. This determines your goal: should you try to run as many risers as possible without going to the upper floors.

Bottom filling, access level - user

1. What does deletion look like? air lock in a house with bottom filling, if you are the owner of one of the apartments in an apartment building?

The key feature of bottom filling is the pairwise connection of heating risers. The supply and return bottlings are located in the basement; The risers are cut off from them by valves, after which there are plugs or taps for discharging water.

All air from the lower filling heating system is forced into the upper part of each pair of risers. In apartments on the top floor or (less often) in the attic there is a jumper between the risers. Directly on it or in the radiator cap of one of the radiators there is a Mayevsky valve - a simple device that allows you to bleed air.

For a resident on the top floor, it is enough to turn the tap half a turn and wait until water flows out of it in a thin stream instead of hissing air. If you live below, pay a visit to your upstairs neighbors at a time convenient for them.

If the residents of the upper floor have not moved in or are away, the problem is solved by the housing organization servicing the house. Your task is to record a claim about the lack of heat in the apartment.

If the problem is not resolved in as soon as possible, you have the right to demand a recalculation for heating, so housing developers usually try to do everything possible and impossible to start the riser.

Bottom filling, access level - administrator

1. How to remove air pockets from a bottom-fill heating system if you are on friendly terms with plumbing and have access to the basement?

Bypass the entire heating circuit. To do this, it is enough to close one of the house heating valves and open the discharge into the sewer located in front of it; if the air has not escaped after 5-10 minutes, the system can be bypassed in the opposite direction (from supply to return or from return to supply).

Don’t forget to close the reset and return the valves to operating mode: shut-off valves at the inlet and outlet of the heating circuit must be completely open.

If the problem concerns individual risers, in many cases they can also be diverted from the basement. After closing the valve on one of the paired risers, open the vent on it. If a large amount of air comes out of the tap along with the water, you have a chance of success.

First of all, this concerns a pair of risers, one of which is idle, and the second has heating devices installed. When starting water to be discharged from the working riser into the idle riser complete removal air always happens.

One of the paired risers feeds the radiators, the second is idle.

If there are plugs on the riser instead of vents, don’t despair, we can try to solve the problem in this case too.

Here are two obvious solutions:

• Close both risers and, having reset them, install instead of one of the plugs ball valve with male-female threads. Unplanned expenses (price ball valve size DU15 - DU20 is approximately 100-200 rubles) will hardly seem like a nightmare to you given the lack of heating;

• Close both valves on the risers, and then unscrew one of the plugs. Having moved the riser to discharge, stop it and screw the plug back, then start it into operating mode. Water hanging in a relatively thin tube will not allow it to take in a new portion of air.

This technique works only at the beginning of the heating season, when the temperature of the mixture at the elevator exit does not exceed 45 degrees. In cold weather, instead of starting the riser, you will get quite serious burns.

Top filling, access level - administrator

1. How to remove an air lock from the heating system of a house with top filling?

The peculiarity of this system is that the supply bottling is located in the attic of the house with the return flow located in the basement. Each riser is switched off at two points - at the top and bottom; all risers are equal and on the same floor have the same temperature.

When the circuit starts, air is forced out of the heating battery and then from the riser into the supply bottling, and then into the closed valve located at its upper point. expansion tank. Having opened the house valves, you must go up to the attic and briefly open the tap at the top of the tank. After the air is displaced by the coolant, circulation in all will be restored.

At the top right is a closed expansion tank with an air release valve.

If you are far from the secrets of valves and gate valves, just apply to service company. In a top-fill house, you won’t be able to bleed air from the battery yourself, but you can easily fill the top floor residents from the attic.

Private house, access level - administrator

1. What to do in a private house if the heating circuit or part of it does not start?

The bad news is that there are no universal recipes: the heating circuit of a private home is always designed individually.

The good thing is that designers are guided by the same principles:

• At forced circulation automatic air vents in the heating system are installed near circulation pump(usually in front of it in the direction of movement of the coolant). The air vent can also be located in the boiler body. If there is air in the circuit, perhaps the air valve is simply clogged with debris or scale;

Boiler safety group. In the center there is an automatic air vent.

• An air release valve is installed on individual heating appliances only if they are located above the filler. If the bottling takes place under the ceiling or in the attic, look for the air valve for heating in its upper part;

• Each bracket (filling bend in vertical plane) is also always equipped with an air vent. If for some reason they are not there, you can try to distill the bottling for disposal using one of the methods described above.

The reason for the lack of circulation is often not air, but a completely or partially closed throttle on one of the heating devices or sections of the circuit.

The photo shows the throttle on the radiator inlet. If it is covered, the battery will be cold.

Safety

1. What not to do when bleeding air?

Human imagination is truly limitless, so I will give only repeated cases from my practice.

Of course, from the repertoire of apartment residents: plumbers have their own quirks.

• Do not completely unscrew the rod from the air vent. It is impossible to wrap it back under the pressure of hot water;
• Do not try to unscrew the valve body itself. Even half a turn. If the thread is broken, flooding of the apartment will become inevitable;

• An even worse idea would be to partially remove any of the radiator caps to bleed air. There were precedents. In the last case I know of, 6 floors were flooded with boiling water.

Prevention

1. Is it possible to modify the heating system with your own hands so as not to encounter the problem of airing?

If you live on the top floor or in a private house, you can.

The recipe is extremely simple:

• In an autonomous circuit, connect heating devices according to the “bottom-down” scheme. Even if air accumulates inside the radiator, it will not affect the circulation of water through the lower manifold. In this case, the battery will be hot throughout its entire volume due to its own thermal conductivity;

• At the top point of the riser or the entire circuit, install automatic air vents. They rarely require maintenance and bleed air locks without your participation.

Conclusion

As you can see, all the problems of heating air are completely solvable. Find out more about possible solutions you can from the video in this article. I look forward to your additions and comments. Good luck, comrades!

How to properly bleed air from a heating radiator? Can I do this myself? Yes! In fact, getting rid of airiness is not difficult. You can do this and significantly improve the quality of your heating system. In this article we will tell you how to bleed air from a heating radiator in an apartment multi-storey building and private.

Air pockets in radiators significantly interfere with their operation. Because of this, the batteries stop working at full capacity or stop heating completely. The appearance of airiness cannot be predicted, and it is difficult to avoid it without the help of a specialist. But if an air lock has formed, then you need to know how to properly bleed air from the heating battery. And no less it is important to know why it was formed.

How to bleed air from a battery with a Mayevsky tap

In houses with individual heating air may enter the system while it is being filled with water or coolant. It usually comes out through the expansion tank. If it is not there, be sure to install it. If the expansion tank is installed, it may not work properly.

Air in the heating system may appear due to its depressurization, especially if it is not working and water or coolant is present in it. Check all radiators and pipes for leaks, especially at joints.

What can an airy radiator cause?

If there is an air lock in the radiator, it begins to heat worse. The larger the air volume inside the sections, the worse they heat.

For aluminum radiators air does not pose a particular danger, unlike steel and bimetallic internal part of steel. Metal corrosion occurs at the point of contact between air and water, which is why it is so important to identify and remove air pollution in a timely manner.

If air appears in the system, it means it can accumulate in the pump, pipelines, heating boiler, etc. this leads to reduced service life.

When air accumulates in the pump, it begins to work with increased power, overheat and wear out a lot. If air gets into the boiler, the water in the heating system will boil, which can lead to a break.

It's getting cold outside, it's getting closer heating season, water is bubbling merrily in the pipelines, filling the system. Along with it come annual problems in the form of barely warm radiators with air pockets. How to bleed air from the battery will be discussed in this article.

Let's consider three possible options for carrying out work:

• if there is an air vent;
• if a regular tap is installed on the radiator;
• there is no fittings.

There is no difficulty in bleeding air from a battery equipped with a manual air vent - a Mayevsky tap. To do this, you should arm yourself with a tool for unscrewing the faucet, a small container and a rag.

Note. Various modifications of the Mayevsky crane can be equipped with screws for different instrument. Most often they are made for a regular flat-head screwdriver, sometimes for a special key or with plastic handle, requiring no tools.

After laying a rag on the floor, you need to make sure that side hole the drain valve is not directed towards the wall. If this is the case, then you need to cover it with something so that dirty water didn't get to finishing material your room. Next, place a container under the hole, and use a screwdriver (or other tool) to carefully and slowly unscrew the screw until a characteristic hissing sound appears. Here you need to stop and wait until the sound disappears.

The cessation of hissing does not at all indicate that the air in the battery has already run out and has all come out. Some of it remains mixed with the coolant, so you need to turn the screw a little more until water comes out of the hole. Here you need to be especially careful, since in the first moments the coolant may come out unevenly and with splashes. After waiting for a small, stable stream, you can tighten the valve. To make sure that everything is done correctly, after a few minutes you need to feel the previously cold part of the battery, it should warm up. If this does not happen, the operation should be repeated.

Often, on various Internet resources or forums, not entirely correct advice is given on how to eliminate air accumulations from heating equipment. For example, that before unscrewing the needle valve of the air vent, you need to go to the basement and shut off the entire riser. Or even worse - that you have to wait until the coolant in the system cools down.

Remember that air will leave the battery only under the pressure of the water displacing it. Being on the top floor and turning off the riser, you reduce the pressure and success of your event to zero. On lower floors when disconnected, the pressure of the water column located above your apartment will remain, but its value will not be enough.

The conclusion is simple: If you do not plan to disassemble the heating device, then you do not need to block anything to perform air discharge work, you just need to take measures so that the hot splashes do not burn your hands.

Bleeding air using a tap

The essence of the method is that air is “squeezed out” from the system if the speed of water movement in a given area is increased. In this case, the turbulent flow “picks up” oxygen with itself, gradually removing it from the heat supply network. For this purpose, instead of the lower or upper plug cast iron battery a regular valve was installed.

In order to bleed air from the radiator in this way, it is best to have a long hose on the household that will be enough to reach the toilet. Otherwise, you will have to run around with buckets, sometimes for quite a long time. One end of the hose is connected to the valve, the other is lowered into the sewer, after which the valve carefully opens. Moreover, it is advisable to open it to the maximum in order to create a good flow of coolant inside the battery.

Important. The degree of valve opening is determined by location. If the pressure in your system is too high, it will be noticeable and there is no need to open the tap completely.

The operation may take long time, it depends on the power of the air plug and the pressure in the heating network. The faster the water flows, the faster it will remove all the air. The process should be controlled by the degree of heating of the cold sections of the heating device.

Air bleed without tap

It is most difficult to bleed air if there is no Mayevsky valve and other fittings. Good news for those who have modern sectional radiators: you can carefully unscrew the top plug in them. True, you will have to cover everything with rags and perform the operation very slowly and carefully. It is not necessary to completely unscrew the plug; you need to make 1-2 turns so that air can pass through the threads.

Advice. Batteries are often equipped with ball valves and thermostats. It makes sense to try to release air through them.

For owners of cast-iron Soviet "accordions" like MS-140, performing the operation is much more risky. Not only is it difficult to move a big old nut, but there is also a danger that after tightening, the gasket will no longer hold and a leak will appear. Then you will have the grueling work of emptying the riser and installing the same Mayevsky valve into the plug. Although to carry out such events it is necessary to attract a team from the local utilities.

Who should bleed the radiators in the apartment?

A little about legal side question. The answer depends on the legislative acts of a particular state. For example, in Russian Federation There is a Decree of the State Construction Committee dated September 27, 2003, in accordance with which the situation when there is air in the heating radiators must be corrected by housing and communal services employees. Other CIS countries also have similar legislation.

In practice, housing and communal services personnel long ago placed this responsibility on residents of apartments 5, 9, 16 and others upper floors. Although, according to reviews from homeowners, in some cities, teams of plumbers, after launching the system, conscientiously check the heating devices in each apartment and remove air locks.

Conclusion

The operation of removing air from batteries is not the most difficult, especially if the appropriate fittings are installed. In the case when there is no reinforcement, you need to worry about it in the off-season and install air valves for all heating devices. Moreover, the price of the issue is quite small.

Often, in the first days after the heating system starts operating, it is discovered that some batteries are not working at full capacity. The reason for this may be airiness of the elements. The solution to this problem is apartment buildings– the task of housing office workers. But they don’t always do it in good faith. And in private households, troubleshooting falls entirely on the shoulders of the owners. Let's look at how to bleed air from the battery yourself.

Before we figure out how to bleed air from the heating system, let's figure out why it accumulates there. Main reasons:

• carrying out repair work– during disassembly/assembly of elements, air inevitably gets into them;
• improper start-up of the heating system in an apartment building - according to the standards, the pipes must be filled with water slowly while simultaneously bleeding out excess air;
• loose fit of parts of the system or poor sealing of joints - the coolant flows out imperceptibly and evaporates, and air is drawn in from outside;
• low pressure in the pipeline, leading to the formation of voids and their filling with air;
• increased amount of oxygen in the coolant - there are always gas bubbles in the water, but if there are too many of them, air pockets can form;
• incorrect connection of the underfloor heating system - arrangement of branches at different heights;
• incorrect operation or absence of an air vent on the battery.

In addition, air accumulation can result low quality radiator differ affordable price and high thermal conductivity. But the metal actively reacts with water, resulting in the release of hydrogen gas. The problem of rapid corrosion is partially solved by a film that covers the inside of aluminum, but it disappears over time. A more reliable, durable and expensive option - bimetallic batteries, in which aluminum is combined with steel that is not susceptible to water.

As a rule, residents face the problem of how to ventilate batteries top floors in apartment buildings. When heated, oxygen dissolved in water rises, forming plugs. In private houses with open system heating, air bubbles freely exit through the expansion tank at the top of the system, so air usually does not accumulate, except in some cases.

Signs of an airlock and its harm

You can suspect the presence of an air lock in the radiator based on the following signs:

• the air temperature in the apartment is significantly lower than that of the neighbors;
• the battery heats up unevenly - the part containing air remains cold;
• Hissing and gurgling sounds are heard.

Due to the accumulation of air in the radiator, the operation of the heating system is disrupted. Possible consequences:

• reduction in the effect of battery operation - the air in the room does not warm up to required level with significant energy consumption;
• damage to pipeline elements due to temperature differences - some parts remain cold, others overheat;
• accelerated corrosion of radiators due to prolonged contact of metal with air;
• failure of the circulation pump under the influence of the “dry friction” effect.

Tip: You can detect air accumulation by tapping the battery metal object. In the plugged area the sound will be higher and louder than in the part filled with water.

How to bleed air from a battery?

The answer to the question of how to bleed air from depends on the type of air vent installed on it. These devices are necessary to facilitate the removal of excess gas from the system. They should be installed in areas where there is a risk of traffic jams, or, what is even more convenient, on each battery. Possible options:

• (manual regulator);
• automatic (float) system.

In addition, a water tap or plug can be installed on the battery.

Mayevsky crane

The Mayevsky crane is stop valve needle type. It is mounted at the top end of the radiator. If it is necessary to bleed air, it should be unscrewed using special key, which can be bought at a hardware store, or a regular screwdriver. Some models are equipped with a plastic handle; no tools are needed to open them.

Stages of air removal work:

1. Place a container under the shut-off valve to collect the coolant.
2. Smoothly unscrew the Mayevsky tap. At the same time, air will begin to escape, which will be accompanied by hissing. It is necessary to wait until a steady stream of water flows out - this is a sign that the plug has been removed. This usually takes 5-7 minutes.
3. Close the valve.

During the process of deflation, water may begin to come out under pressure, splashing into different sides. You should place a rag on the air vent so that the liquid is absorbed into it and flows smoothly into the container. It is worth considering that the water can be quite hot, it is important to avoid getting it on the skin.

Important: Before opening the Mayevsky tap, you do not need to shut off the entire riser heating main or wait until the coolant cools down. These actions are not only unnecessary, but also reduce the efficiency of de-airing due to a drop in pressure in the heating system.

Automatic air vent

If an automatic air vent is installed, then the question of how to properly bleed air from the battery does not arise. This is a device that may have direct or corner structure, works offline. It is mounted on the radiator strictly vertically or horizontally.

The automatic air vent is equipped with a float that tightly closes the valve if there is sufficient water level in the system. As soon as air accumulates in the battery, the float drops, the hole opens, and the gas escapes. That is, deflation occurs without human intervention.

The disadvantage of such an air exhaust device is its sensitivity to water quality. The presence of impurities in the coolant leads to rapid breakdown of the mechanism. In this regard, filters should be used. In addition, you need to periodically replace sealing ring and clean the valve needle. Otherwise, water may begin to leak.

Stub

It is not an easy task to bleed air from a heating battery if there is no air vent and a plug is installed instead. Before starting work, you should block the coolant access to the radiator.

Modern sectional batteries are equipped with top plugs. There is no need to completely remove the fitting. It is enough to carefully turn it slowly, making several turns, and wait until the air comes out. First, all adjacent surfaces should be protected with rags.

Air up the old one cast iron radiator more difficult, since usually the plug on it is securely fixed with tow and paint. Algorithm of actions:

1. Apply a little solvent to the connection between the fitting and the battery. Wait 10-20 minutes.
2. Place a bucket under the hole. Place rags on the floor.
3. By using adjustable wrench Unscrew the plug (not completely) until air begins to escape.
4. Wrap the thread with sealing material and tighten the plug.

It is important to do everything carefully. If you do not turn off the water and remove the fitting completely, then water will flow from the hole. hot water under pressure.

You can determine that the air lock has been eliminated by assessing the temperature of the batteries. Sections that were previously cold should warm up.

Tap

Many old batteries have regular water taps. When you unscrew the valve, water begins to flow from the hole, and with it the accumulated air comes out. You may need to drain several buckets of liquid to remove all the excess gas.

To make the work easier, it is advisable to use a long flexible hose: attach one end to the tap, and lower the other end into the toilet. The valve must be opened as much as possible to ensure high speed water leakage.

A private house

If an air lock occurs, it is necessary not only to work with each battery separately, but also to remove it from the entire system as a whole. The procedure may differ slightly depending on whether you are using an open or closed heating system. But in general, it comes down to the fact that air is released from the batteries using one of the methods described above.

Air locks reduce efficiency heating systems and increase the risk of breakdowns. You can remove excess air from the radiator yourself. The easiest way to do this is if a manual air vent is installed. In the future, it is important to find out the cause of the problem and eliminate it. IN difficult situations It is better to contact employees of housing maintenance offices.

When you first encounter the problem of how to bleed air from radiators, the videos will help you avoid mistakes.