Opposed Blade Volume Damper 3000-0BD-60X42 past 12 months Single deflection radius mount spiral

Single deflection radius mount spiral pipe grille with adjustable blades

blades prevent metal on metal rattle

see 2700 series)

Maximum dimension 48w

Standard Features * 2561 - Square or rectangular fire door for vertical mount only

Opposed Blade Volume Damper 3000-0BD-60X42 past 12 months Single deflection radius mount spiralh3. 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.