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904 Series Submittal
Spiral pipe diameter must be 4” larger than Height of the duct opening
Product sizes available to fit spiral pipe diameter 8” – 48
2" ADC compliant round collar with bead for ease of installation
Opposed Blade Volume Damper 3000-0BD-58X42 Accessories 904 Series Submittalh3. 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.
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