Parallel Blade Volume Damper 3000P-46X42 Commercial 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 4" Duct Opening (front blades parallel to shortest dimension)

Standard Features * 4000 - door core grille with single frame * 4100 - door core grille with additional loose frame *

Maintains horizontal airflow pattern

2x4 * Soft White

Single deflection radius mount spiral pipe grille with adjustable blades

Parallel Blade Volume Damper 3000P-46X42 Commercial 904 - Double Deflection Adjustableh3. 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