How can gas enter a closed system be resolved?

      Constant pressure devices are key to solving gas problems. To prevent oxygen intake, constant pressure devices  must be isolated from the atmosphere and must avoid underpressure and cavitation. Many diaphragm pressure expansion tanks, especially small systems, have incorrect volume regulation and are not maintained according to DIN4807 T2/6 standards, and gas is almost inevitable even in closed-loop installations.

       It is necessary to purposefully use appropriate instruments to extract gases from the sealed system to prevent circulation failures, corrosion, and erosion. The exhaust must be a one-way

lane:

      Gas must be exhausted, but air must not enter.

there are various exhaust methods, resulting in all kinds of results.

      As you can see, in power plants or thermal power plants, steam is commonly used for thermal exhaust, and the exhaust effect of this method is quite significant. However, due to the high cost of this technology and limitations from external technical conditions, at least so far, it is almost impossible to promote it in heating networks. Here, we will only discuss those that are technically feasible and have already been used in heating systems, Physical exhaust methods within a temperature range below 100°C