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How To Order Spirals
Spiral pipe diameter must be 4” larger than Height of the duct opening
850 Series Engineering/Performance Data
Accessory to the 90 Series
Volume Damper Low-Leak OBD 3000-0BDLL-26X24 past 12 months How To Order Spiralsh3. 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.
US$ 26.00
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US$ 41.41
US$ 135.53
US$ 108.93
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