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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20
" Spiral pipe diameter must be 4” larger than width of grille
Blade lock to secure blades once the product is activated
904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 8" Duct Opening (front blades parallel to shortest dimension)
Accessory to the 90 Series
945 Series Engineering/Performance Data
Opposed Blade Volume Damper 3000-0BD-44X22 Specialty Products " Spiral pipe diameter musth3. 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.
