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Single deflection transition box mount spiral pipe grille
Countersunk mounting holes for flush appearance
blade to blade neoprene seals
Install with louvers in up or down position for best duct concealment
951 Series Engineering/Performance Data
Parallel Blade Volume Damper 3000P-40X16 Step Down Ceiling Diffuser 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
