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Blades parallel to shortest dimension
Standard Features * 2633 - Square or rectangular out-of-airstream fire damper for vertical mount only
Blades are parallel to the longest dimension
1550 Series Engineering/Performance Data
Curved saddle with gasket provides airtight fit to spiral pipe
Parallel Blade Volume Damper 3000P-68X62 past 12 months Blades parallel to shortest dimensionh3. 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
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