In installation calculations, one major is HVAC, where ventilation systems are a very important part.

通风系统的安装计算有两种方法，一种是追踪法，一种是变换法。

There are two methods for installing and calculating ventilation systems, one is the tracking method and the other is the transformation method.

通风主要考虑风口、风道、风阀、空气设备和一些附件。下面通风管道厂家介绍通风系统中风管和风阀操作的注意事项：

Ventilation mainly considers air vents, ducts, dampers, air equipment, and some accessories. The following ventilation duct manufacturers will focus on the precautions for operating the ventilation system's air ducts and valves:

一、风管的标识

1、 Identification of air ducts

风管改造前，有一点必须先明确，就是风管的标高。使用高度调整命令查看时，有时显示的结果会有所不同。那是因为管线和管道的标高是一条线或管道的标高，而当我们谈到管道有多高时，我们就把管道看成一条线。如果制作风管，在表示立面时方法会有所不同。要说风管的底标高，或标高，或顶标高。所以在风管之前，一定要看清楚图纸上的风管是未来平齐、未来平齐还是中间平齐，然后相应调整底标高、标高、顶标高。

Before the renovation of the air duct, it is necessary to clarify the elevation of the air duct. When using the height adjustment command to view, sometimes the displayed results may differ. That's because the elevation of pipelines and pipelines is the center elevation of a line or pipeline, and when we talk about how high the pipeline is, we consider the pipeline as a line. If air ducts are made, the method of representing the facade may vary. When it comes to the bottom elevation, center elevation, or top elevation of the air duct. So before installing the air duct, it is important to check whether the air duct on the drawing is future flush, future flush, or center flush, and then adjust the bottom elevation, center elevation, and top elevation accordingly.

现在，我们需要做好管道改造。在这一步，我们需要输入以下几个方面：一，风管的材质，二，风管的壁厚，三，风管的接头类型，第四，风管的保温厚度。

Now, we need to do a good job in pipeline renovation. In this step, we need to input the following aspects: first, the material of the air duct, second, the wall thickness of the air duct, third, the joint type of the air duct, and fourth, the insulation thickness of the air duct.

二、空气阀图纸及注意事项

2、 Air valve drawings and precautions

气阀可直接转换或绘制，方法可参考转换设备。这里有一些关于空气阀的特别之处。在管道，阀门是不扣除管道长度的，但是在风管中，风阀是扣除风管长度的，不同类型的风阀有不同的扣除方法。如下图所示，风道宽度有的是，不管什么值，只从风阀中扣除一个固定值；有的是风管宽度的数值，风阀长度与风管高度固定；在另一种情况下，空气导管的宽度和空气阀的长度之间存在对应关系。我们可以根据具体说明选择不同类型的气阀。

The air valve can be directly converted or drawn, and the method can refer to the conversion equipment. Here are some special things about air valves. In the pipeline profession, valves do not deduct the length of the pipeline, but in the air duct, air valves deduct the length of the air duct, and different types of air valves have different deduction methods. As shown in the figure below, there are some air duct widths, and no matter what value, only a fixed value is deducted from the air valve; Some are numerical values for the width of the air duct, with the length of the air valve fixed to the height of the air duct; In another case, there is a corresponding relationship between the width of the air duct and the length of the air valve. We can choose different types of air valves based on specific instructions.

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This article is dedicated by Jinan Ventilation Pipeline Friendship. For more relevant knowledge, please click on: http://www.jntfgd.com Sincere attitude. We will provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Stay tuned