Parallel Volume Damper Low Leak 3000PLL-62X40 Smoke-Fire Damper Minimum size is 4"x4"

Minimum size is 4"x4"

Nylon bushings on adjustable blades to prevent metal on metal rattle

Available 4" thru 28" round

listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square collar

Tool operated Opposed Blade Damper

Parallel Volume Damper Low Leak 3000PLL-62X40 Smoke-Fire Damper Minimum size is 4"x4"h3. 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