BR-40 Series

The BR-40 series is a pivoted backdraft damper for low-velocity systems. Horizontal mount with a vertical airflow down. Dampers in this series include the BR-40 (no flange) along with BR-41 (flange on discharge) and BR-42 (flange on intake).

Back Pressure: 2 in. wg
Start-to-Open Pressure: 0.05 in. wg
Velocity: Up to 2000 fpm
Temperature: Up to 180°F

Relief Dampers

Damper Selection Guide

Which damper best fits the application? Greenheck’s damper interactive selection guide removes the guesswork. Find blade type, velocity, pressure, AMCA listings, submittals, drawings and more, all in one easy-to-use format.

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