Non-Return Dampers are designed for use in intake & discharge opening in Commercial & Residential Air Conditioning Systems.
When the Ventilation System is ON, the blades of the Non-Return Damper are held in the Open position by the airflow. When the ventilation system is switched OFF, the damper blades close automatically, thus preventing reverse airflow and giving protection against the ingress of untempered air, rain and birds into the Air Conditioning System.
Types of DVAC Non-Return Dampers:
These type of Dampers can be used in application for:
a. Gravity Hood Intake and Exhaust
b. Stairwell Pressurization
c. Room Pressurization
d. Ductwork Outlets