Surely you had to hear such a phrase as "Crane Maevsky." It is intended to descend the air in heating batteries. Without this small device, it is impossible to establish the operation of heating devices, since air is often formed in systems, which prevents normal water circulation.
Content
In no official document, you will not meet the name "Crane Maevsky", but in everyday life this crane is called just so almost all plumbers. And only some may argue and say the correct name of this device. According to the State Standards, the device refers to the category "locking equipment" and named as a "needle radiator air valve". We will not deepen far in history to find out why the air valve has such a name.
Brief historical certificate
The crane was invented in 1933 and immediately began to implement everywhere. If you believe studies of scientists, then such an invention has met a little earlier. In 1931, the crane invented Plumber Roeov. The design consisted of 2 parts, between which there was a gasket. In 1932, with the onset of the heating season, the fauce was held a successful test and began to be used for airbagging in heating radiators. The principle of operation of two cranes is similar, only Maevsky's tap is distinguished by the cone "cone to cone", as well as a cross-shaped key shape. In general, both fixtures cope with one task - the air formed in the system was blended. Over the years, the adaptation of a little-known plumbing has moved into the background, and only one crane "Maevsky" began to apply everywhere.
How faucet works
Obviously, when the temperature in the residential room begins to decrease, then the causes should be seen. The first - batteries are badly heated due to the fact that air and warm water came to the system and can not circulate normally. Then the Maevsky crane for radiators is used.
If you do not remove the air from the system, it will not be fully filled with water and you should not expect heat. To solve such a problem, you need to install a special device on the battery, which is widely used for removal from air radiators. We are talking about central heating systems. Usually, in organizing individual heating, such problems rarely arise, but from personal motives, many owners are installed by Maevsky's cranes for radiators, if water is filled inside the system. In addition, such cranes should be installed on heated towel rails (exception - electric devices for drying towels).
Externally, the valves (normal and automatic) may differ from each other, but they are united by one - the same principle of operation. The crane is a kind of cone stem, if it is completely spinning, it will close the hole.
Aerial valves made of steel or brass, as they are resistant to corrosion. Buyer can choose any crane model you like. The main thing is what you need to pay attention is to the diameter of the thread from the outside. For each type of radiator, you need to pick up the crane of Maevsky in the size of the thread. Standard carving on a cone is 1 inch, 1/2 inches, for cast iron radiators of an old sample, cranes with small threads are used - 3/4 inches. Now such air valves are used for modern outdoor radiators and multi-row batteries "Accord".
When buying, pay attention to the following: Maevsky's cranes can be conventional and automatic.
Crane device
The air valve is simple - it consists of a housing and a cone-shaped screw that screws inside. With a small speed of water supply or insufficient volume (when people drag water from heating batteries in winter for personal needs), air accumulates in the system. As a result, the batteries are badly heated, the temperature is reduced indoors.
Maevsky's crane can be opened manually without the use of a special tool (it depends on the valve model), a screwdriver or key.
How to "Strip" air from the system:
- Prepare a cloth and substitute a bowl of water under the battery. So you do not spoil the floor.
- To release the air, you need to turn the tap for half the turn against the time of the clockwise and wait for the air. If it is very much, you can turn the crane just a little bit and wait.
- As soon as you open the crane, hear a characteristic hiss, it means that the air is smoothly exempt from the heating system. You should not relax, as the air goes quickly and with it will soon begin to go water. As soon as she "goes", it's time to twist the crane, because the air has already come out.
Even a high school student can cope with this work. Actions are simple: turned the crane, waited, closed.
If the system has been installed forced circulation pumps (individual heating), before proceeding to air blending, it is necessary to turn off the pump. If he will continue to work, do not completely remove the air out.
Maevsky's crane is considered a manual device intended for installation in centralized heating systems. If you have home offline heating or closed, then the automatic crane of Maevsky is best suited, which does not require human participation - it works independently, removing excess air from the heating system. It is very convenient, since such a crane of Maevsky will save people from constant control of water temperature in batteries and removal manually.
Since the carving on the air valve for joining remained the same, corresponding to the GOST Soviet times, then you cannot install the automatic crane to any heating radiators, even an old, although the modern sample.
To independently install the crane, you do not need special tools, as well as skills. Understanding how the heating system is arranged, you can easily handle the task.
How to install a crane yourself
Before proceeding with the installation of the crane, the water needs to be merged from the system, unscrew the plug in the radiator (upper part) and install the crane to this place. If the valve is installed on the battery of centralized heating, it is best to mount a crane in the summer, when the water is completely drained from the system.
Consider step by step, how to mount the crane yourself:
- If we need to put Maevsky's crane for cast-iron radiators, then you have to work. You will need to drill the hole at the top, in the plug itself, then make the thread and screw the crane.
- If you use centralized heating, then install the automatic valve is undesirable. Due to the fact that the water in the system is constantly circulating, it is gradually contaminated, so the crane can be very clogged and you will have to constantly clean it. And if we take into account that in large homes, heating is often turned off, then the air is formed quickly.
- Since hydraulic strikes often occur in the central system, it is worth considering the option of acquiring the "Omes" crane or "MS-140", it can withstand up to 15 atm and water temperature in the system to +150 oWITH.
How to serve
Maevsky's air crane is considered reliable, since for many years it works fine. When pollution, large trash particles are present in the system, then the small hole of the crane can clog. Then the device needs to be released from garbage, which accumulates inside or in a plastic lining. It is easy to do, cleaning the hole with a needle or pin.
If you are all done correctly, and the battery does not heat up, it means that the radiator itself clogged. Then the help of a specialist is necessary. Perhaps it will be enough to just clean the battery. Be prepared and to the fact that you may be advised to install a new heating radiator.
If the crane has become unusable, then it must be replaced. This requires a special tool - a gas or adjustable key. You need to hold the battery cork and sticking it out, unscrew the crane.
How to operate correctly
These simple recommendations will help you learn more about how to properly exploit Maevsky's crane to serve for many years:
- install the air valve only on the heating battery;
- sometimes to serve the crane, one screwdriver will be not enough. Especially if the crane is located in a hard-to-reach place, for example, in a niche. Then it is worth thinking about the acquisition of the key;
- when you drop the air, remember that there should not be sources of open fire (for example, a fireplace) or you work with a burning cigarette. Even the smallest sparkle is able to provoke a fire;
- do not keep the crane of Maevsky in the open position, since your heating device can quickly come into disrepair;
- if you did not use the crane for a long time, then the thread can rusted and it will be very difficult to unscrew. You need to drop a little kerosene on the thread and wait for 1-2 minutes. Now you can easily unscrew the threads. Just carefully so that the air began to go out gradually.
What are the advantages of the crane of Maevsky
To prevent operation of the heating system, you can use alternative tools. For example, install a ball valve. But still, Maevsky's crane will be profitable to look at the heating device, thanks to ergonomic design.
Also do not forget that in an apartment building, if you have no crane Maevsky, the risk of flooding the premises below. And this is spoiled nerves and extra expenses for damages. That is why it is worth purchasing and installing the crane of Maevsky. The cost of the air valve compared to the property spoiled from the flood is minimal. The valve costs approximately 20 to 60 rubles.
If you compare the usual valve with automatic, then the latter although it looks beautiful, but due to dirty water often clogs. Because of this, the crane can break and do not work on time.
The advantage of the crane is also the fact that it is a reliable and easy operation of shut-off equipment. It can be installed on any batteries, since the kit comes the sealing rubber ring. You just need to correctly install the valve and rotate the screw to get rid of convincing.
It is important if you live on the top floor, the fate of the inhabitants of the whole riser depends on your actions. If you delete air from the system in a timely manner, then all residents of the house or the riser will have hot batteries, which means warmth in the house.
Installing in its apartment crane Maevsky, you save money for heating. With timely control of the temperature of the radiators, you will prevent their cooling, and therefore the room will warm evenly and you do not have to include electrical heating devices to warm up in the frost.
To find out the principle of work of the crane of Maevsky, look at this video:
