Volume Damper Low-Leak OBD 3000-0BDLL-54X50 T-Bar Standard collar diameter is the

Standard collar diameter is the same as the diffuser size

Hinged perforated face with screwdriver access to release

Extruded aluminum frame with signature line marks

Standard Features * Field installable butterfly damper * Available in sizes 6

Designed for return applications and as a vented access door to equipment

Volume Damper Low-Leak OBD 3000-0BDLL-54X50 T-Bar Standard collar diameter is theh3. 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.