In  the ventilation duct, in addition to the duct, there are some hanger  and other accessories, so its installation is divided into two parts,  part of the duct, including the spiral duct, rectangular duct, etc.,  there is a part of the hanging Frame, the following to specifically introduce these two parts.
Air duct
(1) The installation of the duct shall be carried out after the  completion of the construction of the building envelope and after the  completion of the site.
(2) Before installing the air duct, the position, elevation and  direction of the duct should be checked. To meet the design  requirements, the position of the hole should be correct. The size of  the hole should be greater than 100mm and above the size of the duct.
(3) duct handling should be prevented when a collision or beating, so as not to damage the duct. Before installation should be cleaned up dust and debris, the  installation process if the pause, should close the air duct to prevent  dust and foreign matter into the duct.
(4) duct connection can not be installed in the wall or floor, the duct can not lay pipes, wires and cables.
(5)  If the duct is to transport flammable and explosive gases, or in such  an environment, then the necessary grounding measures should be  protected; if the temperature is higher than 80 ℃, you should take the  necessary protection Measures.
(6) the bottom of the duct should not have splicing, if should do a good job sealing.
(7) If the duct to pass through the floor or wall, you should use the  embedded pipe or protective casing, they also have a flexible material  between the block.
(8) When the duct is connected to the equipment, the connection shall  be provided with a flexible short pipe of 150-300 mm, or a specified  length.
(9) The position of the duct designation hole shall be selected in the  area where no eddy current is generated, and it is easy to measure and  observe.
2. Support hanger
(1) all the accessories of the hanger, the use of the material used,  should meet the design requirements and parameter requirements.
(2) The minimum size of the hanger shall comply with the maximum allowable installation distance of the duct.
(3) hanger hanger embedded parts should be installed correctly, and to  be solid and reliable, the embedded part should be cleaned, and exposed  parts should be anti-corrosion treatment.
(4)  The hanger shall not be located in the operating part of the equipment.  When the hanger is fixed, it should be fixed with the anchor bolt. The  use of the bolts shall meet the requirements.