The installation of air duct is a complicated process, which requires careful, patient and correct methods to successfully install the air duct. It is necessary to master the precautions for air duct installation to control the details, which determine the success or failure.
Preparation before construction: 1. All installation materials shall be provided with factory certificate or quality appraisal document and product list. 2. The finished air duct shall be free of deformation, distortion, cracking, holes, flange falling off, missing riveting, missing bolt holes and other defects. 3. The installed valve body, air outlet and other components shall be checked to see whether the regulating device is flexible, and whether the silencer and paint layer are damaged. 4. Materials used for installation: bolts, nuts, washers and other auxiliary materials shall meet the product quality requirements. 5. Check whether the size and position of the reserved holes on the site and the size of the air duct meet the requirements of the drawing to avoid invalid installation.
Prerequisites for installation: 1. The construction of building enclosure is completed, all obstacles and sundries have been cleared, and all sundries on the ground have been cleared! 2. When installing the air duct of the purification system, the floor of the internal installation parts of the building has been completed, and the wall concrete leveling has been completed, it must be carried out under the condition that there is no dust or dust prevention measures in the room. 3. The auxiliary materials at the installation site must be complete, and the construction technician shall guide the quality and technology.
Air duct installation regulations: 1. No other pipelines are allowed to pass through the air duct. 2. The air duct installed in the flammable and explosive environment should be well grounded. The air duct passing through the living area or production area must be installed tightly, and the air duct interface cannot be installed. 3. The fixation of outdoor vertical air duct shall not be connected with lightning rod or house lightning protection facilities. 4. The installation of the air duct must comply with the following technical regulations: ① The configuration of the connection between the air duct and the ventilation equipment, accessories, and the connection pipe of the connection part shall not be reduced. ② The hanger cannot be set at the air outlet, air valve, inspection door and automatic control mechanism, and cannot be fixed on the flange to avoid the deformation of the air duct affecting the function of the air duct. ③ The installation of hangers must comply with the corresponding installation regulations. The suspended air ducts and components should be equipped with fixed points to prevent swing, such as fixed supports, supports, etc. The location and number of fixed points should be determined according to the system conditions. ④ Flange padding and thickness should be different according to the temperature of the delivered air, and the selected materials should also be different. ⑤ When the air duct and its components pass through the wall and roof, a rain cover shall be provided. When the air duct passing through the roof exceeds 1.5m, a cable shall be used. The cable shall be galvanized or steel wire rope. The cable shall not be fixed on the air duct flange, and shall not be pulled on the lightning rod or lightning protection net. ⑥ The flexible stub pipe shall be installed with appropriate tightness and shall not be twisted. The length of flexible metal or non-metallic flexible air duct shall not exceed 2m, and there shall be no dead bend or collapse. ⑦ The supports and hangers of insulation air ducts should be set outside the insulation layer, and the insulation layer should not be damaged.
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