Volume Damper Low-Leak OBD 3000-0BDLL-62X48 Commercial Free area equals more than

Free area equals more than 75% of nominal size

Standard Features * 2561 - Square or rectangular fire door for vertical mount only

Spring actuated curtain-type fire damper with 2 1/4" round connection for horizontal or vertical mount

Performance Data With Multi-Shutter Damper

425 Series Submittal

Volume Damper Low-Leak OBD 3000-0BDLL-62X48 Commercial Free area equals more thanh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee 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.