Backdraft Damper Horizontal Down 3570-64X40

Backdraft Damper Horizontal Down 3570-64X40h3. 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

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 30" Duct Opening (front blades parallel to shortest dimension)

115T Series Engineering/Performance Data

Type 316 stainless steel

904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 14" Duct Opening (front blades parallel to shortest dimension)

For damper free area chart B click here * 2665 - Round fire door for vertical mount only

HVL Series Engineering/Performance Data

Available in even sizes 6" to 20" and 24"

2500/2600 Installation Instructions

165° standard * All sizes utilize one main curtain stay * Galvanized finish h3

Standard Features *Surface mount return air grille * 45 fixed blades parallel to longest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * 935 O - recessed screwdriver operated opposed blade damper * No Labor Collar (square sizes only) * 900 T - T-Bar mount * 905 HD - reinforced construction * 905 IS - insect screen * 1335-1338 Series - stainless steel version * Tamper proof screws

Countersunk mounting holes for a flush appearance

Blades spaced at 2/3"