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blade to blade neoprene seals
BD - field installable Bowtie Damper (available on even sizes 6"-14")
* UL and California State Fire Marshall approved * 4-1/4" standard frame style * Interlocking steel roll-formed blade (3) with roll-formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G-90) * Self locking corner (4) * 165° replaceable fusible link (2) h3
Recessed screwdriver operated opposed blade damper to control air volume for positive balance of system
Louvers designed with rolled rib for maximum strength and rigidity
Backdraft Vertical Mount 3550-24X34 Specialty Products blade to blade neoprene sealsh3. Standard Features * 3550 Vertical mount * 3560 Horizontal mount air up * 3570 Horizontal mount air down * 3580 Round sizes available 5" to 24" * All non motorized backdraft dampers * Dampers are opened by air pressure differential and closed by gravity * 16 gauge channel frame with 26 gauge galvanized blades * Out of airstream linkage * Blades are vee stiffened 26 gauge for strength and stability * Square steel pivot pins * Nylon bushings * Single
