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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
Blades run parallel to longest dimension
Extruded aluminum frame with steel roll formed blades and steel multi-shutter damper
Square collar designed for a 20” × 20”
22 gauge butterfly style galvanized steel blades
Square to round 2" collar with roll formed retention bead
Opposed Blade Volume Damper 3000-0BD-72X28 Accessories Blades run parallel to longesth3. 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.
