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listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square Collar
PERFORMANCE DATA 907 Series Engineering/Performance Data
Square collar designed for 22" x 22" duct
2750 Install Instructions
Options * 2800 Series - Dynamic Fire Damper * Sleeve variations * 304 stainless steel construction * Fractional and odd sizes available h3
Volume Damper Low-Leak OBD 3000-0BDLL-34X12 Smoke-Fire Damper listed Fire-Resistance Diffuser * TVBh3. 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.
