The geometry of the main air duct and branch air supply duct of Dongguan spiral duct 1. The main air duct and branch air duct are radiating 2. Radial 3. Peripheral loop type Peripheral loop type 7 Air outlet position 1. Peripheral air supply system 2. The ceiling air supply system is related to the envelope structure 3. The high-end air supply system of the inner wall is selected according to the needs and local building codes 1. Stainless steel plate 2. Galvanized steel plate 3. Plastic-coated steel plate 4. Aluminum plate 5. PVC plastic plate 6. Glass fiber reinforced, glass steel plate flexible metal spiral duct cement asbestos 8 Resistance of air duct system Air distribution system or duct system has certain resistance for each flow. This resistance is the sum of the pressure drop of air flowing through pipes, air outlets, dampers, filters and fan coils.
The square duct of Dongguan spiral duct is designed to be square as much as possible, and the aspect ratio should not exceed 8: 1, and it should be controlled within 4: 1 range; smooth duct material is used. During the installation, due to changes in materials, installation and connection methods, etc., there will be differences in actual resistance and design resistance. Therefore, a certain safety factor should be considered when selecting fans and motors; Avoid conflicts between air ducts and pipes or other building facilities.