[Upgraded] Hon&Guan 8 Inch Duct Backdraft Damper, Draft Blocker One-Way Airflow Ducting Backflow Preventer Duct Draft Blocker, HVAC Inline Fan

Features

• 【Upgrade design】 The 8 inch damper has two new inwardly recessed ribs on the top and bottom, an increase in thickness to 0.6mm, and 3 springs instead of 2, ensuring that the product is more robust and less prone to damage.
• 【Material】The 8'' backdraft damper and the flap leaves is made of a Galvanized steel to withstand temperatures up to 140°F, the Axis are made of aluminum, while the spring are made of carbon steel
• 【Installation method】The 8 inch duct damper has an opening of 200 mm and a length of 88 mm. When installed horizontally, the springs should be positioned horizontally to allow for optimal opening and closing
• 【Wide applications】Back draught valves can be inserted into ventilation ducts which are flexible or non-flexible. Designed for use with range hoods, bathroom fans, kitchen and other home HVAC applications
• 【Lightweight valve wings】The valve wings open under the pressure created by the airflow; when the air flows in the opposite direction, it is automatically closed under the action of the spring, so as to cut off the flow. Rubber ring ensure 100% closure and quiet closing.