Ventilation and air conditioning construction Duct system support, hanger installation requirements:
 
1. Fan, air conditioning unit, fan tray and other equipment support, hanger design requirements set the vibration isolator, its variety, specifications should meet the design and product technical requirements.
 
2. Support, hanger should not be set in the wind, check the mouth and the valve, automatic control of the operating parts, and the outlet should not be less than 200mm.
 
3. Round duct U-shaped tube card arc should be uniform, and should be consistent with the outer diameter of the duct.
 
4. Support, hanger from the end of the duct should not be greater than 1000mm, from the horizontal elbow starting point spacing should not be greater than 500mm. Supports in the branch of the hanger from the trunk should not be greater than 1200mm.
 
5. The connection between the boom and the hanger should be firm. When the boom is threaded, the length of the thread that is screwed into the connecting nut should be greater than the diameter of the boom, and there shall be anti-loosening measures. The boom should be straight, thread complete, smooth. After installation, the hanger of the force should be uniform, no deformation.
 
6. Fire bulbs with side length (diameter) greater than or equal to 630mm shall be provided with independent support and hanger. When connecting with other non-metallic air ducts with horizontal length (diameter) of more than 200mm, , Hanger.
 
7. Horizontal installation of the composite duct and support, hanger contact surface of the two ends should be set to a thickness greater than or equal to 1.0mm width is 60mm-80mm, length is preferably 100mm-120mm galvanized angle gasket.
 
8. The vertical installation of non-metallic and composite duct, can be used angle steel or channel processing into a "well" shaped hoop as a bracket. When the stand is installed. The inner wall of the duct should be galvanized within the metal sleeve, and should be used galvanized bolts through the pipe wall will be fixed with the hood and inner sleeve. Screw hole spacing should not be greater than 120mm, the nut should be located outside the duct. Bolt through the pipe wall should be sealed.
 
9. Muffler elbow or side length (diameter) greater than 1250mm elbow, three links should be set up independent support, hanger.
 
10. Horizontal suspension ducts longer than 20m should be provided with at least one anti-sway brackets.
 
11. Stainless steel plate, aluminum duct and carbon steel support, hanger contact, should take anti-electrochemical corrosion measures.
 
The above content is based on the actual work of the students encountered problems collated for reference, if any questions please communicate in time, correction.

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