Parallel Blade Volume Damper 3000P-40X34 Smoke-Fire Damper Nylon bushings on adjustable blades

Nylon bushings on adjustable blades to prevent metal on metal rattle

*Pricing is based on standard 14 GA steel construction

Extended sleeve (2751)

904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 20" Duct Opening (front blades parallel to shortest dimension)

53% free area * 1306: 3/4" lattice opening

Parallel Blade Volume Damper 3000P-40X34 Smoke-Fire Damper Nylon bushings on adjustable bladesh3. 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