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Negator stainless steel closure springs mounted on spring pin brackets
2" ADC compliant round collar with bead for ease of installation
blade to blade neoprene seals
Note: Sizes are Listed Nominal Duct Opening
69% free area * 1308: 7/8" lattice opening
Parallel Volume Damper Low Leak 3000PLL-66X48 past 12 months 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
