Dampers: What Are They And What Are Their Types?

Fire Dampers

Dampers refer to devices that, with the help of adjustable blades, control the flow of air from one side to the other. These devices are not the same as simple airflow adjusters. They are of great significance, especially for controlling warm, cool, dirty, high temperature as well as toxic air. Apart from that, dampers can also be used for protection against fire.

These devices are known to sustain air quality and provide safety to workers, making them crucial for industrial airflow regulation. Moreover, they are considered to be the right choice for large as well as complicated systems because of the availability of a variety of designs. Such availability enables you to choose the type of damper that best suits the requirements of your industrial processing system. In most cases, each type of damper serves only a specific purpose, and it is vital to choose the right design for a steady operation in the long run.

Sometimes, choosing the right design can get very confusing, especially if you are unaware of the different types of damper testing machine  that are available in the market. Here you get familiar with some of the most common types of industrial dampers, which will help you pick the right one for your needs.

Multi-blade control dampers:

These types of dampers are also referred to as multi-blade louver dampers or rectangular dampers. Multi-blade dampers are available in two varieties on the basis of blade action. These two varieties include parallel blade action and opposed blade action. Parallel blade action is the one where all the blades close and open in the same direction and also at the same angle. On the other hand, in opposed blade action, the rotation of the adjacent blades is in the opposite direction.

In the majority of the cases, the parallel blade dampers are the ones that are used for closed/open operation, while the opposed blade dampers are mostly used for modulating damper operation.

Parallel blades offer improved control over the airflow, especially at the end of the operating range. These blades are mostly used to direct the air to a particular side whenever necessary.

Opposed blades are the one that offers an improved regulation on the flow of the air throughout the operating range. These blades are used for the purpose of providing increased laminar flow.

Single blade dampers:

Also known as wafer dampers or butterfly dampers, these dampers are available in square, rectangular, or round varieties. The blades of this type can either be of double skin airfoil design or single thickness. The single-blade damper is often considered a cost-efficient alternative to other expensive options.

Backdraft and pressure relief dampers:

Commercial backdraft dampers are usually used in heavy, medium, and light-duty HVAC and industrial applications. These types of dampers enable the automatic flow of air in one direction and prevent the reverse flow of air through the unit. Fans are often equipped with backdraft dampers to reduce back-pressure, which could lead the fan to backspin. 

These functions can also be performed by pressure relief dampers but at an elevated and adjustable start to open pressure. This type of damper is used to prevent excess pressurization of the system.

It is crucial to have a proper understanding of the different types of dampers and their applications to make the ideal choice for your industrial processing system. Therefore, make sure to research enough before going for any particular damper.


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