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Interlocking steel roll-formed blades
Blades are parallel to the shortest dimension
RD Series Engineering/Performance Data
22 gauge galvanized steel roll formed frame
For damper free area chart B click here * 2565 - Round fire door for vertical mount only
Opposed Blade Volume Damper 3000-0BD-56X32 T-Bar Interlocking steel roll-formed bladesh3. 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.
