The Maevsky crane is a very convenient and useful thing. If you do not know what you are talking about and what the Maevsky crane is for, you need to say that it is an air vent, which allows you to manually control the air in the heating system and, if available, remove it for better operation of the radiators .
If you are interested in how the Majewski crane works and how it works, then it looks something like this: the air from the system gets through the inlet into the open faucet and exits through the outlet hole, which is located on the side of the casing. When the valve is closed, the valve does not allow fluid to escape from the pipes. This is prevented by a tightly fitting screw to the inside of the housing.
The main element of the valve is a needle shut-off valve. Its movement occurs by scrolling the screw, designed for a special screwdriver. And on the radiators there is usually a special opening for the installation of the plug and valve.
How to install the Maevsky crane?
To determine exactly where to put the crane of Majewski, you need to know what kind of heating system you have - vertical or horizontal.
So, with a vertical system, the air vent valve is placed on all appliances on the top floor of the house. If at least one section of the pipeline from the instrument to the riser is below the axis of connection of the device (radiator, battery, convector), then naturally the air can not simply be removed.
The installation of the Mayevsky crane begins by twisting it into the upper cooler on the radiator. It is important to choose the right diameter and additionally use a sealing winding or a gasket.
If the heating system in the house is horizontal, it is absolutely necessary to install the Maevsky crane absolutely on all instruments and collectors. If the cast-iron radiator does not provide for the installation of a crane or other device to remove air, you can cut the thread yourself. For this you need a 10x1 tap with a collar, a 9 mm drill and an electric drill. The hole must be drilled in a blind futon on the center first from the inside, then - from the outside side the thread is cut. All this will take quite a bit of time - only 15 minutes.
If it is necessary to install a vent valve on steel pipes, it is easiest to weld a steel boss with the desired internal diameter or install a tee with a tap before the register.
How to use the Mayevsky crane?
If the house has a stagnation and zavozdushivanie batteries, then you need to get rid of excess air, otherwise the heating system will work ineffectively. And at this stage it is important to know how to open the Maevsky crane correctly.
So, before opening the crane, remove all valuable and damp things away from the radiator. Prepare a basin and a screwdriver in advance. Installing a screwdriver on a special thread on the tap,
As soon as you hear the hissing of air escaping from the tube in the radiator, stop rotating the screwdriver. Be prepared for the fact that the air will burst out with a loud sound - warn all your household members about it so that no one is scared.
As soon as water starts to run out of the tap instead of the air, close it by turning the screwdriver clockwise. Probably, water will start to splash from a pipe even at a stage of an exit of air. Just put the basin and wait until all the air is out.
Usually after such a "cleaning" of batteries, they start to work much more efficiently, warming the room much better and faster. But if this does not happen, you probably have a problem with the radiator clogging . And in this case you need the help of a qualified plumber.