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1x2 T-Bar (8" x 20" duct)
SD52 - Transition Box Spiral Pipe Grille (Single Deflection)
Submittal and Performance Data
904 - Double Deflection Adjustable Aluminum Blade Grille For a 32" x 18" Duct Opening (front blades parallel to shortest dimension)
Standard Features * Round 1-1/2 hour fire damper * Horizontal or Vertical installation * UL and California State Fire Marshall approved * Damper construction meets NFPA 90A requirements * Stainless steel curtain * 16 gauge steel frame * UL listed fusible link
Volume Damper Low-Leak OBD 3000-0BDLL-24X36 Smoke-Fire Damper 1x2 T-Bar (8" x 20"h3. 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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