Fresh air system ventilation pipe anti-backflow check valve check valve odor preventer 80 100 120 160 200

125 (connected to 120/125 pipes), 160 (connected to 150/160 pipes), 200 (connected to 200 pipes)

Smoke check valve refers to a valve that automatically opens and closes the valve disc through the thermal flow of the range hood, used to prevent the backflow of oil fume. It is also known as smoke check valve, smoke prevention treasure, and smoke isolation device. The flue check valve is an automatic valve that mainly prevents the backflow of oil fumes, allowing only one direction of flow and preventing the airflow from flowing in the opposite direction. When the range hood starts working, the airflow carrying oil fumes passes through the air inlet and guide surface, pushes open the one-way valve, and discharges the oil fumes into the public flue; When the range hood stops working, the one-way valve automatically closes under the action of gravity, isolating the oil fume channel from the public flue, and preventing the oil fume from flowing back into the public flue.

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