Volume Damper Low-Leak OBD 3000-0BDLL-64X40 Smoke-Fire Damper Uniform 360 degree discharge pattern

Uniform 360 degree discharge pattern

Blade lock to secure blades once the product is activated

2" ADC compliant round collar with bead for ease of installation

For damper free area chart B click here * 2665 - Round fire door for vertical mount only

Volume Damper Low-Leak OBD 3000-0BDLL-64X40 Smoke-Fire Damper Uniform 360 degree discharge patternh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3.