The most commonly used metal duct has a duct and flexible duct two kinds. Iron metal duct thick skin is made 1.2 ~ 3mm, typically a 3m, with coupling flanges, the clamp rubber gasket, which can be used under negative pressure ventilation duct without modification, but it is easy to joint leakage It is not convenient to move. The flexible air duct is made of glass cloth as a lining, and the outer surface is pressed with plastic or rubber. The flexible air cylinder is acid and moisture resistant, light in weight and foldable. It is 10m long and has a small air leakage. It is currently widely used in mines. Airtight Revolving Door Handle Revolving Door Handle ,Handle Lever Lock Set,Bathroom Door Handle,Shower Door Hinges Guangdong Haitan electric cabinet lock Co., Ltd , https://www.htcabinetlock.com
What types of air ducts are there?