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425 Series Submittal
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 8" Duct Opening (front blades parallel to shortest dimension)
Vertical mount only
2" ADC compliant round collar with bead for ease of installation
* 2602 - Square or rectangular spring actuated (6) for horizontal or vertical mount
Volume Damper Low-Leak OBD 3000-0BDLL-72X50 Specialty Products 425 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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