How does the exhaust valve on the radiator work? Why do radiators need to be vented?

The working principle of the exhaust valve is that when there is air in the system, the gas will gather in the upper part of the exhaust valve, and the gas in the valve will accumulate and the pressure will rise. When the gas pressure is greater than the system pressure, the gas will make the water level in the cavity drop, and the buoy will open the exhaust port with the drop of water level;

After the gas is exhausted, the water level rises, and the buoy also rises, closing the exhaust port. If the bonnet on the valve body is tightened, the exhaust valve stops exhausting. Under normal circumstances, the hood should be open.

In the process of water supply, gas will enter the heating pipeline. If the gas is congested, the heating will not be hot. Therefore, it is necessary to install an exhaust valve above the radiator to release the gas and make the heating system circulate smoothly.

Extended data:

The radiator has been idle until the next heating season. Therefore, it is necessary to clean and protect the radiator before heating. It is also important to maintain the radiator correctly.

Before the arrival of the new heating season, check the exhaust valve, plug and pipe fittings connected with the radiator, and tighten the threaded joint if it is loose (affected by thermal expansion and contraction) to avoid water leakage after heating. In addition, please use a soft towel or brush when cleaning the radiator surface. Do not use any organic solution. You can use daily detergents, such as detergent and weak alkaline soapy water.

Understand the material of radiator and the correct maintenance method of radiator. Different materials of heat sinks have different maintenance methods. For example, steel heat sinks generally need full water maintenance, while aluminum ones do not.

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