Backdraft DAMPER: Square air duct connector with check valve, made of material, to oil and heat. The backdraft damper keeps odors and exhaust gases out of , preventing backflow. [Working Prime]: 1 When the exhaust starts, the air pressure pushes the butterfly valve to open, and odor and exhaust gas is quickly discharged. 2. After the exhaust is completed, the pipeline butterfly valve automatically close under the action of . The check valve always remain closed to prevent the exhaust gas, dust and odor from entering the room. [ VALVE OPENS AND CLOSES INTERNATIONAL ]: The Duck Adaptor with butterfly check valve design facilities smoothly opening of the valve when driven by during exhaust After exhaust, the butterfly valve automatically close under the action of .
Backdraft DAMPER: Square air duct connector with check valve, made of material, to oil and heat. The backdraft damper keeps odors and exhaust gases out of , preventing backflow. [Working Prime]: 1 When the exhaust starts, the air pressure pushes the butterfly valve to open, and odor and exhaust gas is quickly discharged. 2. After the exhaust is completed, the pipeline butterfly valve automatically close under the action of . The check valve always remain closed to prevent the exhaust gas, dust and odor from entering the room. [ VALVE OPENS AND CLOSES INTERNATIONAL ]: The Duck Adaptor with butterfly check valve design facilities smoothly opening of the valve when driven by during exhaust After exhaust, the butterfly valve automatically close under the action of .
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