Parallel Volume Damper Low Leak 3000PLL-52X44 Smoke-Fire Damper remove the two center cones

remove the two center cones as a unit and reposition the six screws

Ideal for residential and light commercial application

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Square to round 2" collar with roll formed retention bead

Parallel Volume Damper Low Leak 3000PLL-52X44 Smoke-Fire Damper remove the two center conesh3. 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