{"product_id":"p-1859352","title":"1 Inch OD Duct Backdraft Damper Manual Volume Damper for Vents Fans","description":"The 304 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.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecification  \u003c\/strong\u003e\u003cbr\u003eColor: Silver\u003cbr\u003eMaterial: 304 Stainless Steel\u003cbr\u003eOuter Diameter: 25 mm \/ 1 inch\u003cbr\u003eInner Diameter: 23 mm \/ 0.9 inch\u003cbr\u003eThickness: 1 mm \/ 0.04 inch\u003cbr\u003eLength: 100 mm \/ 3.94 inch\u003cbr\u003ePacking List: 1Pcs Duct Backdraft Damper\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eAdvantage\u003c\/strong\u003e\u003cbr\u003eMATERIAL: 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.\u003cbr\u003eFLEXIBLE OPERATION: 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 the duct damper convenient for staff to make quick adjustments.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eInstruction\u003c\/strong\u003e\u003cbr\u003e1. 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.\u003cbr\u003e2. 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.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003cbr\u003ePlease avoid high temperature, flammable and explosive environments to install and reserve sufficient maintenance space.","brand":"Harfington","offers":[{"title":"Default Title","offer_id":48709197627641,"sku":"a25040700ux2304","price":16.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/2477\/6095\/files\/ux_a25040700ux2304_ux_g03.jpg?v=1784921360","url":"https:\/\/www.harfington.com\/products\/p-1859352","provider":"Harfington","version":"1.0","type":"link"}