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SD52 - Transition Box Spiral Pipe Grille (Single Deflection)
Margin edges are 7/8" projection for baseboard installation
Nylon bushings on adjustable blades to prevent metal on metal rattle
are enclosed in the valve to assure trouble free operation * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Steel multi-shutter damper * Soft White Options * 845 O - steel lever operated opposed blade damper * Tamper proof screws * Standard Color
CB10 Engineering/Performance Data
Pressure Relief Horizontal Air Up 3520-12X14 Commercial SD52 - Transition Box Spiralh3. Standard Features * 3510 Vertical mount * 3520 Horizontal mount air up * 3530 Horizontal mount air down * Designed to open with negative or positive pressures for intake or exhaust air * Felt edge blades to hold noise to a minimum * Aluminum construction * Blade to blade linkage * 1 4" pivot pins in nylon busings * Maximum size 24 x 24 * Mill finish h3. Options * Sleeve variations * Mounting flange * Adjustable counter balance to adjust various
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