Parallel Volume Damper Low Leak 3000PLL-22X18 Commercial Single deflection transition box mount

Single deflection transition box mount spiral pipe grille

For damper free area chart A click here * 2663 - Out-of-Airstream fire door

1/4” Wide x 1-27/32” High slots

1 1/2 hour fire resistance rating

Parallel Volume Damper Low Leak 3000PLL-22X18 Commercial Single 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