Opposed Blade Volume Damper 3000-0BD-52X38 T-Bar Square to round transition collar

Square to round transition collar

How To Order Spirals

Ceiling opening must be 4” larger in length and width than the nominal duct size

available 4" through 40" round (2549)

2" ADC compliant round collar with bead for ease of installation (square sizes only)

Opposed Blade Volume Damper 3000-0BD-52X38 T-Bar Square to round transition collarh3. 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.