Parallel Blade Volume Damper 3000P-56X48 T-Bar Single deflection radius mount spiral

Single deflection radius mount spiral pipe grille with adjustable blades

Flush core and frame provides smooth surface

to 23 29/32"

One piece steel frame

Parallel Blade Volume Damper 3000P-56X48 T-Bar Single deflection radius mount spiralh3. 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