Opposed Blade Volume Damper 3000-0BD-50X30 Step Down Ceiling Diffuser 2-way reversible door on rectangular

2-way reversible door on rectangular sizes

Multi-Shutter Damper standard on 6" widths and larger

2 position adjustment for heating and cooling seasons

AA-HVL Series Engineering/Performance Data

Opposed Blade Volume Damper 3000-0BD-50X30 Step Down Ceiling Diffuser 2-way reversible door on rectangularh3. 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.