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*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
For damper free area chart A click here * 2563 - Out-of-Airstream fire door
Dampers above 80 square inches free area will be provided with blade insulation
HVL Series Submittal
Nylon bushings for easy adjustment and quiet setting of blades running parallel to shortest dimension
Parallel Volume Damper Low Leak 3000PLL-26X18 T-Bar *Note: Ceramic fiber blade insulationh3. 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
