Non Return Damper Back Draft Damper

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Non Return Damper Back Draft Damper

Non-Return Damper / Back Draft Damper

Non-return dampers come in various designs and sizes to suit different applications and airflow requirements. They may be manual, where the flap or blades are operated manually, or automatic, where they are controlled by springs, gravity, or other mechanisms.

A non-return damper, also known as a back draft damper or a one-way air flow valve, is a device used in ventilation systems to prevent the reversal of airflow. It allows air or gas to flow in one direction while preventing it from flowing in the opposite direction.

These dampers are commonly used in various HVAC (Heating, Ventilation, and Air Conditioning) systems, exhaust systems, and other applications where maintaining proper airflow direction is essential for safety, efficiency, or environmental control.

The mechanism of a non-return damper typically consists of a flap or a set of blades that are designed to open when the airflow is in the desired direction and close when there is backflow or reverse airflow. This helps to prevent the escape of conditioned air from the system, maintain pressure differentials, and prevent the entry of unwanted air, contaminants, or odors from outside.