Parallel Volume Damper Low Leak 3000PLL-60X46 Step Down Ceiling Diffuser One piece stamped steel frame

One piece stamped steel frame on most common sizes

RD Series Engineering/Performance Data

Standard Features * Individually adjustable curved blade T-Bar lay in diffuser with concealed hinges * Hinged perforated face * Spring push release for easy access to adjust curved blades * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar sizes: 6-10"

" Spiral pipe diameter must be 4” larger than width of grille

Parallel Volume Damper Low Leak 3000PLL-60X46 Step Down Ceiling Diffuser One piece stamped steel frameh3. 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