When the gas escapes from the system, the gas will be along the pipeline to climb and eventually gathered in the highest point of the system, and automatic exhaust valve is generally installed at the highest point of the system, when the gas enters the exhaust valve chamber gathered in the upper part of the exhaust valve, with the increase of the gas in the valve, pressure rise, when the gas pressure is greater than the system pressure, the gas will decrease the water cavity, float along with the water level down, open the exhaust port; gas is exhausted after the water level rises, float will also rise, closing the exhaust mouth.
The same token, when the system to generate negative pressure, in the valve cavity of the water drop, exhaust port to open, because at this time outside atmospheric pressure than the system pressure big, so the atmosphere will through the vent into the system, preventing the negative pressure of harm. Tighten the valve body as valve cap, automatic exhaust valve to stop the exhaust, usually cases, valve cap should in the open state.
The exhaust valve must be installed vertically, must ensure that the valve body float in the vertical state, not horizontal or inverted installation;
As the gas density is smaller than the water, will be along the pipeline has been climbing to the highest point of the system and gather here, in order to improve the exhaust efficiency, exhaust valve is generally installed at the highest point of the system;
In order to facilitate maintenance, the exhaust valve is generally used with the partition valve, so that the exhaust valve is not required to shut down the system;
Exhaust valve installed after the need to loosen the black dust cap to exhaust, but can not completely take off.
