Round Relief Damper

Circular relief damper for industrial ventilation systems.



Relieving excessive vacuum or pressure in a duct or vessel


Inlet and Outlet Size:
8.00″ to 48.00″

Pressure Ratings

Pressure Rating:
15inWC to 50inWC

Up to 6,000fpm


The shaft is off center and has an adjustable counter weight. If the pressure differential exceeds a set level, the blade will open to relieve the pressure and allow air to pass through.

Larger sizes and higher pressure ratings are available upon request.
3D model files and installation drawings are available upon order. See data sheet for ordering details.