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Individually welded 14 guage diffusion bars
Tool operated Opposed Blade Damper
Available 4" thru 28" round
Minimum size is 4"x4"
Parallel Volume Damper Low Leak 3000PLL-62X40 Smoke-Fire Damper Individually welded 14 guage diffusionh3. 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
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