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Double deflection transition box mount spiral pipe grille
round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U
Standard Features * 1 1/2 hour rated fire damper * 2549 - Round damper for vertical mount only
All steel construction
2550 Series Submittal
Parallel Blade Volume Damper 3000P-64X18 Specialty Products Double deflection transition box mounth3. 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
