Degassing valves are used in pipeline exhaust of independent heating systems, central heating systems, heating boilers, central air conditioning, floor heating and solar heating systems.
When gas overflows in the system, the gas will climb up the pipeline and eventually gather at the highest point of the system, while the
degassing valve is generally installed at the highest point of the system. In the upper part, with the increase of gas in the valve, the pressure rises. When the gas pressure is greater than the system pressure, the gas will make the water level in the cavity drop, the buoy will drop with the water level, and the exhaust port will be opened; after the gas is exhausted, the water level will rise and the buoy will also rise. As it rises, close the exhaust port. In the same way, when negative pressure is generated in the system, the water level in the valve cavity drops, and the exhaust port opens. Since the external atmospheric pressure is higher than the system pressure at this time, the atmosphere will enter the system through the exhaust port to prevent the harm of negative pressure. If the bonnet on the valve body of the exhaust valve is tightened, the exhaust valve stops exhausting. Normally, the bonnet should be in the open state. The exhaust valve can also be used in conjunction with the isolation valve to facilitate the maintenance of the exhaust valve.
