Active air release valve, air release is completely active without manual operation. Its working principle is: when there is air in the system, the gas collects on the upper part of the air release valve, the gas in the valve accumulates, and the pressure rises. When the gas pressure is greater than the system pressure When the gas is exhausted, the water level in the cavity will 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, the buoy will also rise, and the exhaust port will be closed. If the bonnet on the valve body is tightened, the exhaust valve stops exhausting, and the bonnet should be left open under normal circumstances.
