What are the types of ventilation air damper?According to what classification?

As an indispensable part of ventilation engineering, the damper relies on the airflow force in the air duct to locate the position of the control damper, so as to maintain the airflow at the pre-set flow rate within the entire pressure difference range. In use, many people do not know what kinds of these dampers are, and what kinds of dampers are commonly used in ventilation engineering?

Air duct damper according to its use:

•  Automatic regulating damper

Mainly used in the automatic adjustment of fresh air, primary return air and secondary return air. In addition to meeting the requirements of the regulating damper that is often switched on and off, it should also have good regulating characteristics.
 

• Disposable regulating damper

If the system is unbalanced, the regulating damper is set up to achieve the required air volume. It is also divided into: slot damper, butterfly damper, multi-leaf regulating damper and three-way damper.
 

• The switch of the regulating damper

Mainly: fresh air damper, primary and secondary return air damper, exhaust damper (including comprehensive exhaust and local exhaust air exhaust damper) and so on.

What kinds of dampers are commonly used in ventilation engineering?

• Smoke and fire damper

The smoke damper is generally used in the smoke exhaust system, and one can be installed at the inlet of the smoke exhaust fan to prevent smoke and fire. It is usually divided into two types of electric and manual, the same point is that its usual work is normally open, the fuse closing temperature is 70 ° C, and the air damper can be adjusted.

• Smoke fire damper

The smoke exhaust fire damper is installed in a separate smoke exhaust system or a combined exhaust air and smoke exhaust system. It usually works in a normally open state. In case of fire, when the smoke temperature in the pipeline reaches 280℃, it is blown off and closed.

•  Manual control damper

At present, the application of the multi-leaf regulating damper is more in the engineering, its role is to manually adjust and distribute the air volume of the branch pipeline of the air duct system, without remote control, only through the initial balance adjustment can meet the requirements of the system air volume distribution, and its application is relatively simple.

• Electric regulating damper

Installed on the air duct of the air conditioning and ventilation system, it is used to adjust the air volume of the branch pipe, and can also be used for the mixed adjustment of fresh air and return air. Use electric power to open or close the damper, output open and close electrical signal. With automatic control system, automatic control and adjustment of air volume.
 

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