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round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U
700MA Series Engineering/Performance Data
Double deflection transition box mount spiral pipe grille
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 30" Duct Opening (front blades parallel to shortest dimension)
floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application
Parallel Blade Volume Damper 3000P-64X18 Specialty Products round collar only) * 830h3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee 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. Options * 3000 PLL Low Leak Air Control
