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Lever operated steel multi-shutter damper
Interlocking steel roll-formed blades
5/32” crossbars
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 18" Duct Opening (front blades parallel to shortest dimension)
Standard Features * Stamped 22 gauge steel curved blade T-Bar lay-in supply diffuser * Field adjustable * Five air patterns: 101 - one way
Parallel Blade Volume Damper 3000P-10X8 Smoke-Fire Damper Lever operated steel multi-shutter damperh3. 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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