Any heating system that uses liquid to transfer heat from water heaters to batteries has a vicious enemy. And his name is air. It does not allow the heated liquid to move freely from the boiler to the radiator, batteries. Suspending it in places where there are the highest points. The first task when filling heating systems is to remove air, for example with Mayevsky taps.
But even if the allowance of the heating system manages to get rid of air jams, then over time, air is formed in the system again. The air mixture dissolved in water forms bubbles that immobilize the heating system in certain areas. Therefore, to constantly play off the "enemy", set automatic air vent.
Types of automatic air vents
Now let's look at the principle of operation of a device with a direct connection. It was possible to disassemble it and find out how it releases air.
Disassembly
This device is a flask with a screw cap on one side and a 15 mm thread on the other. The cover itself has an air bleed hole. Scrolling through the gallery.
Having opened the body, we see three main parts: a lid with a spring-loaded nipple, an all-metal body - a bulb and a float (a piece of plastic with air ...).
Let's move on to the very principle of work:
Normally, the air vent is half filled with water from the heating system. The float inside is fixed in the upward position and does not press on the spring. The nipple-spring is at rest.
But if suddenly a cork slips in the area where our "device" is standing, then it falls into the flask, rushing up. Thus, it displaces water into the pipes. In airspace, in accordance with the laws of physics, the float falls to the bottom of the flask. Thus, the nipple presses on the spring. A hole in the lid opens slightly and air rushes out.
Having released the air mixture, the air vent is filled with water from the system and the nipple closes because the float has been lifted by the liquid.
We assemble our device in the reverse order. Photo in the gallery.
When turned off, the plastic cap is tightly screwed on. In order for the automatic air vent to work, the cap must be unscrewed by half or removed.
Need to know
Almost all air vents of this type must be strictly vertical. If the installation is made at an angle or horizontally, then the float inside the chamber will not work correctly, which will lead to non-removal of the gas-air mixture and stop heating systems. Each device comes with instructions, we carefully familiarize ourselves with it before installation.
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