Kunshan new Youde mechanical sharing: ventilation ducts commonly used materials and shape specifications

In order to better grasp and use of ventilation pipes, we have to learn more about the following commonly used ventilation duct materials and shapes. I hope to help you buy.

First, commonly used materials
As a spiral duct ventilation pipe materials are many commonly used mainly metal sheet and non-metallic materials.
1, metal sheet
Commonly used sheet metal are ordinary steel, galvanized steel, stainless steel, aluminum and plastic composite board. Easy to manufacture with industrial processing, easy installation, can withstand the advantages of higher temperature.
2, non-metallic materials
Commonly used are rigid PVC plastic sheet and glass steel, all kinds of material duct characteristics, specifications and scope of application see "ventilation design manual."
Second, the wind pipe shape and specifications
1, the wind pipe section shape
Ventilation pipe cross-sectional shape of a circular and rectangular two. In the same cross-sectional area under the conditions of the spiral duct short and most economical, in the same air volume than the rectangular air duct pressure loss is larger than the spiral duct Therefore, under the circumstances are using circular duct, and sometimes only in order to facilitate and building with Taiwan Only a moment line section. From the rectangular duct pressure loss formula can be drawn: the rectangular duct pressure loss increases with the duct width to height ratio increases accordingly. Therefore, the juice should be made to the aspect ratio close to l. Of course, sometimes depends on the scene.
2, ventilation pipe specifications
Ventilation, air conditioning system, air duct, should adopt spiral duct. Length ratio of not more than 4 rectangular cross-section, the maximum length of the short side of the ratio should not exceed 1O, duct cross-section size, should the existing national standards for ventilation and air conditioning construction quality acceptance norms.
3, the air duct insulation
When the air duct in the air transport process towel cooling heat loss and large air temperature is required to maintain a constant, or to prevent the duct through the room when the indoor air parameters affect or discharge the gas into the atmosphere may be cooled before the formation of condensate Clogged or corroded air duct and spiral duct surface may have condensation, the need for air duct insulation. Usually insulation layer has a coating insulation layer, moisture-proof layer and protective layer four-layer structure.