Opposed Blade Volume Damper 3000-0BD-24X36 past 12 months 1 1/2 hour fire resistance

1 1/2 hour fire resistance rating

Steel construction

Square to round transition collar

450 Series Submittal

HVL Series Submittal

Opposed Blade Volume Damper 3000-0BD-24X36 past 12 months 1 1/2 hour fire resistanceh3. 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.