{"product_id":"p-1860002","title":"8 Inch Duct Backdraft Damper Manual Volume Damper for Vents Fans Heating System","description":"The manual air valve can accurately control the air flow rate and flow direction to ensure stable and efficient operation of the ventilation system. Whether it is a factory workshop, a commercial building, or 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: Galvanized iron, Silicone\u003cbr\u003eFlange Outer Diameter: 200 mm \/ 7.87 inch\u003cbr\u003eDuct Damper Outer Diameter: 150 mm \/ 6 inch\u003cbr\u003eThickness: 1 mm \/ 0.04 inch\u003cbr\u003eLength: 190 mm \/ 7.48 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 galvanized iron, which has strong anti-rust ability, can effectively resist moisture, acid and alkali corrosion, adapt to a variety of complex environments. The silicone seals are tightly fitted, which can greatly reduce air leakage and ensure stable operation of the ventilation system.\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 adaptive specifications according to the diameter of the ventilation pipe. After cleaning the connecting parts of the pipe, use flanges and bolts (not included) to closely connect the air valve to the flanged pipes to prevent air leakage.\u003cbr\u003e2. Position the air duct valve on accessible place and reserve sufficient maintenance space,turn the handle to adjust the air flow based on your requirement.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003cbr\u003ePlease check the size carefully before ordering.","brand":"Harfington","offers":[{"title":"Default Title","offer_id":48709190451449,"sku":"a25040700ux1009","price":47.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/2477\/6095\/files\/ux_a25040700ux1009_ux_g03.jpg?v=1784921087","url":"https:\/\/www.harfington.com\/products\/p-1860002","provider":"Harfington","version":"1.0","type":"link"}