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* 2634 - Square or rectangular Spring actuated (6) out-of-airstream fire damper for horizontal or vertical mount
Spiral pipe diameter must be 4” larger than the width of the grille
4-Way ceiling register with stiffened 1/2" fan shaped louvers for silent operation
Adjustable curved blade diffuser
Parallel Blade Volume Damper 3000P-18X44 Commercial * 2634 - Square orh3. 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
