Parallel Volume Damper Low Leak 3000PLL-52X34 Smoke-Fire Damper Louvers designed with rolled rib

Louvers designed with rolled rib for maximum strength and rigidity

Damper manufactured from corrosion tested galvanized mild steel (G-90)

Adjustable directional dampers with shut-off

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 16" Duct Opening (front blades parallel to shortest dimension)

3 hour fire resistance rating

Parallel Volume Damper Low Leak 3000PLL-52X34 Smoke-Fire Damper Louvers designed with rolled ribh3. 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