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12" and 14") * HVD OR - factory installed opposed radial damper (sizes 6"-14") * HVD FR - U
Rust resistant pre-coat with durable powder finish
Retainer cables are provided on sizes 12" and larger to allow the inner cones to hang securely while adjusting the diffuser
425 Series Submittal
with 60% free area
Parallel Blade Volume Damper 3000P-72X34 T-Bar 12" and 14") * HVDh3. 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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