Parallel Volume Damper Low Leak 3000PLL-24X40 past 12 months Spiral pipe diameter must be

Spiral pipe diameter must be 4” larger than Height of the duct opening

Standard Features * Converts T-bar products to surface mount * Sizes available: 1x2

Blades spaced at 2/3"

060 T6 extruded aluminum construction * Completely vision proof * High air capacities * Will accommodate door thickness ranging from 1 1/4" to 2 1/4" * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Driftwood Tan Options * 1310 Series - stainless steel door grille * Tamper proof screws * Standard Color

Steel galvaneal construction

Parallel Volume Damper Low Leak 3000PLL-24X40 past 12 months Spiral pipe diameter must beh3. 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