The role of the automatic exhaust valve on the water supply system
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Release Time：2018-01-11
When there is gas overflow in the system, the gas will climb up the pipeline and finally gather at the highest point of the system. The automatic exhaust valve is generally installed at the highest point of the system. When the gas enters the exhaust valve cavity and gathers at the upper part of the exhaust valve, the pressure rises with the increase of the gas in the valve. When the gas pressure is greater than the system pressure, the gas will drop the water level in the cavity, and the float will open the exhaust port, as the water level rises, the pontoon also rises, closing the exhaust port. By the same token, when negative pressure is generated in the system, the water surface in the valve cavity drops and the exhaust port opens. At this time, the external atmospheric pressure is greater than the system pressure, so
When there is gas overflow in the system, the gas will climb up the pipeline and finally gather at the highest point of the system. The automatic exhaust valve is generally installed at the highest point of the system. When the gas enters the exhaust valve cavity and gathers at the upper part of the exhaust valve, the pressure rises with the increase of the gas in the valve. When the gas pressure is greater than the system pressure, the gas will drop the water level in the cavity, and the float will open the exhaust port, as the water level rises, the pontoon also rises, closing the exhaust port. By the same token, when negative pressure is generated in the system, the water surface in the valve cavity drops and the exhaust port opens. At this time, the external atmospheric pressure is higher than the system pressure, so the atmosphere will enter the system through the exhaust port to prevent the harm of negative pressure. If you tighten the bonnet on the valve body of the exhaust valve, the automatic exhaust valve stops the exhaust. Normally, the bonnet should be in the open state.
The exhaust valve must be installed vertically, and the float in the valve body must be ensured to be in a vertical state, and cannot be installed horizontally or upside down;
Since the gas density is smaller than water, it will climb along the pipeline to the highest point of the system and gather here. In order to improve the exhaust efficiency, the exhaust valve is generally installed at the highest point of the system;
In order to facilitate maintenance, the exhaust valve is generally used together with the partition valve, so that the removal of the exhaust valve is not required to shut down the system;
After the exhaust valve is installed, the black dust cap must be loosened to exhaust, but it cannot be completely removed. In case of leakage of the exhaust valve, the dust cap can be tightened.
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