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2" ADC compliant round collar with bead for ease of installation
UL listed and tested in accordance with UL Standard 555
Countersunk mounting holes with color matching Philips posi-drive screws
Maintains horizontal airflow pattern
To adjust diffuser
Parallel Volume Damper Low Leak 3000PLL-38X18 Smoke-Fire Damper 2" ADC compliant round collarh3. 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
