Air ducts for heating systems - installation features and operating principle

The main problem of living in a city apartment is the heating system. Heating is quite the samean uneasy scheme for heating various industrial buildings and living quarters, which is based on the regular maintenance of a comfortable living microclimate.

Before the start of the heating season, utilities warn every year that they need to release air. In some cases, the reason for the occurrence of air is the release of hydrogen from water due to the peculiar chemical effects.But this problem can be avoided by installing air vent valves for heating systems. What kind of devices are they, how they work and why they are needed? This will be discussed later.

Why does the air appear in the system?

Air in the heating system can fall for a variety of reasons.

The most common among them are:

• when the system is first filled with water;
• because of poor-quality or worn sealing elements;
• because of water make-up;
• corrosion inside pipes;
• violation of the installation rules when conducting and connecting a heating system, etc.

When water enters the heating system,It contains a large amount of oxygen, which when heated expands and forms air congestion. They, in turn, reduce the pressure in the system and reduce the rate of water circulation. Thus, if there are no air ducts installed in your apartment for heating systems, you must manually release the air. If this is not done, then the premises will be badly and unevenly warmed up, which, in turn, will negatively affect the comfort of living.

Kinds

There are two types of air vent:

• manual;
• automatic.

Automatic air vents in the systemheating are more practical and convenient in operation, since they do not require any action from the person. However, their cost will be higher than the manual counterparts. Their installation should be carried out in places where the probability of formation of air congestion is the highest. Manual installation is performed on radiators.

How do they work?

The operating principle of the air vent in the heating system depends on the design features of these devices.

Manual air vent (as it is not hard to guessfrom the title) require human intervention, while equipment with automatic control can simply be set and forever forgotten about it, as it will release the air itself as necessary.

What problems can cause the heating of the heating system?

Before you talk about how it worksinstallation of an air vent in the heating system, let's first figure out the main problems that can lead to the appearance of air in the heating pipes and radiators. Air makes it difficult to circulate water through the system, as a result of which the efficiency of heating the room is significantly reduced. In addition, air-blasting will cause vibrations, which in time can lead to physical damage to the heating system at the welding sites of individual elements.

The accumulation of air in the pipes will contribute totheir rusting and reduced service life. But the most terrible problem is defrosting the system, because of which you can remain without heat in the winter.

Design features

Manual and automatic air vents have similar design features, with the exception of some differences.

Both types of devices consist of a channel and a valve,which is responsible for removing air from the heating system. To choose which type of equipment to install at home, it is necessary to understand the operating principle of a manual and automatic air vent.

How does the device with automatic control work?

So, how the air vent works in the systemheating with automatic control? If there is no air in the pipes, the float is raised, and the needle valve is in the closed position. When the air cork is formed, the float is lowered, as a result of which the rocker opens the valve, air is released. When all air is fully exhausted, the float returns to its original position, closing the valve.

Principle of work of the manual device

Manual air vent for heating systems(the price of which is lower than the automatic price and starts from 200 rubles) have a simpler design, but the principle of operation remains the same. As the regulator rotates, the valve opens, releasing the accumulated air from the pipes. Rotation in the opposite direction leads the valve to the closed position.

Where is it recommended to perform the installation?

If your apartment has a heating system opentype, then the descent of air from it is carried out through the expansion tank. Difficulties can arise in the event that a pump is installed in the heating system, forcing circulating water through the pipes. In this case it is recommended to install the device for manual or automatic air vent. But where to put the air vent in the heating system?

If you bought a manual device, then itsThe installation should be carried out directly on the radiators. In this case, the installation is recommended on all radiators, since it is in them that most often there is air-blasting. When using automatic devices, the best place for installation is the highest point in the heating system. This is due to the fact that the formed air will rise exactly upwards, where it will be withdrawn from the system through the air vent.

Structural design

There are quite a few types of air vent, which differ in their design.

In form, they can be straight, angled, as well as vertical or horizontal. According to the principle of operation, this equipment is divided into ball and needle.

Some people who want to save moneycarrying out of heating in the dwelling, establish not воздухоотводчики for systems of heating, and usual cranes. With their help, you can not only drain the accumulated air in the pipes, but also drain the stagnant water. But cranes are very rare today, as most people prefer to install the air ducts, which have already become an integral part of the heating system, which in its importance is not inferior to the heating elements and radiators. It is the air ducts that are responsible for maintaining the heating system in working order.

Installation of automatic devices

The efficiency of heating the house and the reliability of the work depends on the correct installation of the separators.

This work is not difficult, so cope with itevery person can, even if he has never done anything like this before. But here it is important to have an idea of ​​how to perform the installation. So how is the installation of an automatic air vent in the heating system?

As mentioned earlier, for their installation,choose those places in which the probability of the formation of air congestion is the highest. Such places include the highest points of heating equipment, collectors and heating system circuits. There is one important nuance: the air vent should be mounted strictly in an upright position. If this is impossible for some reason, you will have to purchase parts with a horizontal outlet.

So, how to properly install the air vent in the heating system with automatic descent, we sorted out. Let's now talk about how the installation of a hand-held taps takes place.

Installing a Handheld Device

For old radiators used in systemscentral heating, the installation of automatic air vent will not be the best solution. This statement is true for at least two reasons. First, such heating systems are used for many years, for which they, as a rule, have never been cleaned.

Secondly, the air jams in them formvery often, so devices with automatic operation will wear out too quickly and fail. Thus, it is best to use manual devices in apartments with old centralized heating.

How to install a heating system ventwith manual control? It is quite easy to do this. First of all, at the highest point of the radiator a hole is drilled, in which the thread is then threaded and the Maevsky crane screwed in. The whole process does not take much time and effort, so everyone can cope with it. It should be noted that the air vent should be mounted on each radiator, where the air plugs are most often formed, which must necessarily be removed from the system.

When selecting manual air vent valves,attention to their labeling. If there are hydraulic shocks in the heating system, then it is necessary to buy the MC-140 or OMEX models. They are able to withstand high temperatures, up to 150 degrees.

How to release air from the heating system?

We have already dealt with the consequences to whichcan lead to the formation of air plugs in pipes and radiators, and also talked about how to install air outlets for heating systems. Now it remains only to understand how the air is evacuated with the help of divers.

The first step is to perform an inspectionheating system for leaks. If they are found, then they need to be eliminated. If forced circulation is used in the system, it is necessary to check the functioning of the water pump and carry out preventive measures. If everything is in order, then you can start to lower the air.

This procedure is performed in the following sequence:

1. Power is de-energized.
2. The heater switches off and the water supply to the heating system is blocked.
3. The air vent opens to a maximum, after which you will hear a characteristic hiss, which is accompanied by the air outlet from the system.
4. The stagnant water merges until it starts to go clean and without air bubbles.

After all the air is released from thesystem, it is necessary to fill it with water. First of all, the water heater is filled, and then the radiators and pipes. It will not be superfluous to add to the water a special substance that has anti-corrosive properties. This will significantly increase the service life of the heating system and save on its partial or complete replacement.

If you find, in the course of the work,that the heating system is clogged, then it is necessary to perform its cleaning. To do this, it is better to use special chemicals that effectively cope with any blockages. You can buy them in any store specializing in the sale of heating equipment and related products.