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remove the two center cones as a unit and reposition the six screws
TS Series Engineering/Performance Data
Standard collar diameter is the same as the diffuser size
916 Series Submittal
Recessed screwdriver operated opposed blade damper to control air volume for positive balance of system
Volume Damper Low-Leak OBD 3000-0BDLL-44X36 Residential Registers & Grilles remove the two center conesh3. 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.
