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Types of Dampers in HVAC

A damper in an HVAC system, also known as duct damper is a movable plate, situated in the duct work that regulates the flow of air and redirects it to specific places of a house. The usage of dampers is typically seen in zoning or zone control system. Dampers are an essential part of those industries where gasses and liquids are moved through pipes and ducts to provide control over the flow of materials.

Introduction to Different Types of Dampers

Air Dampers are available in various sizes and shapes like square, circular, and it is crucial to use the right type of damper for the specific application at hand. The location of a damper, its ducting structure and it’s purpose all together determine the type of it. Such dampers are known as zero leakage bubble tight damper, volume control damper, motorized volume damper etc.

Dampers for HVAC applications have many variations and you can operate them through different means including manual, mechanical and automatic method. Some of the various types of dampers used in HVAC system are mentioned below.

1. Butterfly Flat Dish Damper

butterfly-damper-smallButterfly dish dampers are mainly designed for high efficiency with less maintenance. They use a blade on a hinge which is built to fill up the duct when lined up accurately to restrict the flow of air. They have the ability to completely stop the airflow and also available with multiple blades when it is necessary. Another important fact about Butterfly dampers are that they are capable of preventing back-draft by only enabling the air to flow in a single direction making them a suitable choice for fire prevention and heating application. Their applications cover Oxidizers, Bag houses, Scrubbers, Heaters, Precipitators etc.

2. Blade Dampers

Blade dampers are made of thin metal plates used to or regulate the air flow inside air handling equipment like HVAC systems, chimneys and ducts. Opposed blade dampers have blades that move in the opposite directions. Blade dampers are designed for an amazing metering and control. They are equipped with greater strength, superior sealing capacity and produce less noise.

3. Guillotine Dampers

Guillotine dampers are best known for its capability to provide the best seal possible. They are kept in a place to completely block the airflow and it can be used at any place where proper isolation is required for regular maintenance or entry to a duct behind a media source.

4. Louver Dampers

This type of dampers is particularly used for its quick response time and strong air blocking properties. These dampers typically use flat blades on hinges to fill any size of duct. They are one of the most frequently used HVAC dampers.

5. Inlet Vane Dampers

The inlet vane dampers are commonly used on fan inlet applications that provide a better flow of materials and pressure control. Their usage can sometimes be seen in HVAC settings where a facility needs full regulation over its ventilation. These dampers have multiple blades designed around a central hub improving the fan’s performance by introducing swirl into the fan inlet offering an excellent method of control.

Each of these HVAC dampers serves different purpose. Your HVAC system might even needs all of these above mentioned dampers working together. Knowing the usage of each of them helps you choose the right damper for your HVAC system.
Call 905-670-2277 to inquire about EB Air Control HVAC Dampers and other products.

ebair_wpTypes of Dampers in HVAC

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