Dual-port compound exhaust valve uses: dual-port compound exhaust valve installed in the water pipe, used to drain the air inside the pipe to exclude the normal flow of gas and affect the water, it is an energy-saving equipment, When the pipeline needs to be emptied or a vacuum is generated, air can be automatically refilled from the valve to speed drainage and protect the thin-walled copper tube from deformation and rupture, and to prevent the sewage outside the pipe from entering the pipeline through leaking. Dual-port compound exhaust valve works: 1, in the absence of water under pressure, the float and disc are landed in the casing. When the pipe is filled with water, a lot of air is discharged from the large exhaust port. 2, the air almost exhausted, the water began to float into the valve float, the float and the valve prop up again, blocking the large exhaust outlet to stop the water outflow. 3, the valve block after a large exhaust port, as long as the water and gas pipeline pressure was in the state, the valve will not fall. At this moment, if the air in the pipeline accumulates to a certain amount in the exhaust valve, the buoyancy buoyancy of the float drops and the air is discharged from the small exhaust hole of the guide rod. After the air is exhausted, the float rises again to block the small vent. 4, the pipeline negative pressure, the valve flap and float are sucked down, a large number of make-up air from the large exhaust.
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