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round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U
Stamped steel face with roll formed frame
104 D FR - U
Designed for return applications and as a vented access door to equipment
12 & 14" * Mill finish
Parallel Blade Volume Damper 3000P-38X16 Accessories round collar only) * 830h3. 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
