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1.7 Inch Duct Backdraft Damper, Manual Adjustment Airflow Volume Damper for Vents Fans Extractors Range Hoods Heating Systems

<ul><li>Manual Airflow Control: Manually adjust airflow volume and direction by rotating the handwheel or handle, without complex electronic control equipment.</li><li>Corrosion Resistant Build: Constructed from 304 stainless steel, providing anti-rust and corrosion resistance against moisture, acid, and alkali.</li><li>Duct Compatibility: Features an inner diameter of 17 mm / 0.7 inch and an outer diameter of 20 mm / 0.8 inch for ventilation pipe connection.</li><li>Compact Dimensions: Measures 100 mm / 3.94 inch in length with a 1 mm / 0.04 inch thickness.</li></ul>

<ul><li>Color: Silver</li><li>Material: 304 Stainless Steel</li><li>Outer Diameter: 20 mm / 0.8 inch</li><li>Inner Diameter: 17 mm / 0.7 inch</li><li>Thickness: 1 mm / 0.04 inch</li></ul>

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The stainless steel manual air valve can accurately control the flow rate and flow direction of the air flow in the ventilation duct to ensure stable and efficient operation of the ventilation system. Whether it is a factory workshop, a commercial building, or a residential fresh air system, it is necessary for its control over the circulation of the air. Specification &nbsp; Color: Silver; Material:304 Stainless Steel; Outer Diameter: 20 mm / 0.8 inch; Inner Diameter: 17 mm / 0.7 inch; Thickness: 1 mm / 0.04 inch; Length: 100 mm / 3.94 inch; Packing List: 1Pcs Duct Backdraft Damper Advantage 1. The main body is made of 304 stainless steel, which boasts excellent anti-rust and corrosion resistance. The duct damper can effectively withstand moisture, acid, alkali and other corrosive factors, adapting to various complex environments. 2. Manual operation method, by rotating the handwheel or handle, the air volume can be flexibly controlled, without the need for complex electronic control equipment, making it convenient for staff to make quick adjustments. Instruction 1. Select an air valve with the adaptive specifications according to the diameter of the ventilation pipe. After cleaning the connecting parts of the pipe, use flanges and bolts to closely connect the air valve to the pipe to prevent air leakage. 2. Turn the handle clockwise to reduce the air volume and close the valve plate, and rotate counterclockwise to increase the air volume and open the valve plate. Note Please avoid high temperature, flammable and explosive environments to install and reserve sufficient maintenance space.

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