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Adjustable steel roll formed blades oriented for 1 or 2 way airflow pattern
1/2" spacing dual angular louvers
2" thin-line roll formed out-of-airstream frame
Access door with 1-3/8" deep steel roll formed frame
Designed for use in walls
Parallel Volume Damper Low Leak 3000PLL-34X24 Smoke-Fire Damper Adjustable steel roll formed bladesh3. 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
