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Recessed screwdriver operated opposed blade damper to control air volume for positive balance of system
1/4” crossbars
2-way register with stiffened 1/2" fan-shaped louvers for silent operation
Spiral Diffuser Radius Flush Mount Diffuser Single Deflection with Damper
enclosed in valve to assure trouble-free operation
Volume Damper Low-Leak OBD 3000-0BDLL-42X12 Smoke-Fire Damper Recessed screwdriver operated opposed bladeh3. 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.
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