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2550 Series Engineering/Performance Data
Allows for 4-way airflow
*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
2500/2600 Installation Instructions
Extruded aluminum frame with steel roll formed blades and steel multi-shutter damper
Parallel Volume Damper Low Leak 3000PLL-68X38 Commercial 2550 Series Engineering/Performance Datah3. 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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