Opposed Blade Volume Damper 3000-0BD-72X52 Smoke-Fire Damper Single deflection radius mount spiral

Single deflection radius mount spiral pipe grille with adjustable blades

T-Bar hinged 2 Cone Step Down Diffuser with Round Collar

Stamped steel face with roll formed frame

Square to round transition collar

*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches

Opposed Blade Volume Damper 3000-0BD-72X52 Smoke-Fire Damper 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.