Parallel Blade Volume Damper 3000P-40X30 Residential Registers & Grilles Negator stainless steel closure springs

Negator stainless steel closure springs mounted on spring pin brackets

950 Series Engineering/Performance Data

Allows for 2-way airflow

Provides 4-way air flow on one plane

Parallel Blade Volume Damper 3000P-40X30 Residential Registers & Grilles 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