1. Most of the floating balls in the automatic exhaust valve are plastic parts, and most of them are made of recycled plastic.

After the operation of the system, the plastic floating ball was soaked in high-temperature water for a long time and deformed, and in serious cases, it leaked, which made the floating ball unable to rise normally and led to the leakage of the exhaust valve.

2. The floating ball lever is an ordinary iron piece, and the connecting bolt between the floating ball and the lever is an ordinary iron bolt.

After long-term operation of the system, the iron core rusted and could not work normally, resulting in the leakage of the exhaust valve.

3. The sealing end face of the exhaust port of the automatic exhaust valve is mostly reclaimed rubber, which is easy to age and deform.

After the system runs for a long time, even if the automatic exhaust valve is filled with water, the sealing end face will not tightly block the exhaust port, resulting in water leakage of the exhaust valve.

4. Under the condition that the circulating water of the indoor hot water heating system is isolated from the primary network, the water quality is affected by the equipment status in the residential heat exchange station.

The general residential heat exchange station has no oxygen removal and ion exchange devices, but only a simple decontamination device is installed on the main return pipe of the system, which cannot fundamentally control the water quality. Based on this situation, the circulating water in the system is not clean and corrodes the system pipeline. When the dirt in the circulating water sticks to the sealing end face of the automatic exhaust valve, it will leak.

Solve the problem of water leakage of automatic exhaust valve;

1. It is best to choose brass, because cast iron rusts easily and stainless steel is expensive.

2. At the end of heating every year, the automatic exhaust valve can be disassembled and cleaned to avoid scale blocking the exhaust port.

3. It is best to use an automatic exhaust valve with a partition valve, so that when there is a problem with the exhaust valve, the heating of the whole room will not be affected.

4. The automatic exhaust valve should be installed vertically at the highest point of the system, and there should be enough space around it to facilitate maintenance and replacement.

5. Ordinary users, who are afraid of trouble and have poor hands-on ability, had better buy the automatic exhaust valve with guaranteed quality directly.