Parallel Blade Volume Damper 3000P-22X22 Specialty Products Negator stainless steel closure springs

Negator stainless steel closure springs mounted on spring pin brackets

3-way register with stiffened 1/2" fan shaped louvers for silent operation

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 24" Duct Opening (front blades parallel to shortest dimension)

Louvers designed with rolled rib for maximum strength and rigidity

CB30 - three way

Parallel Blade Volume Damper 3000P-22X22 Specialty Products Negator stainless steel closure springsh3. 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