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Retainer cables are provided on sizes 12" and larger to allow the inner cones to hang securely while adjusting the diffuser
Extruded aluminum fixed bar blades at 45°
Recessed screwdriver operated Opposed Blade Damper
Steel riveted and metal formed assembly
1550 Series Submittal
Pressure Relief HD 3530-12X20 Specialty Products Retainer cables are provided onh3. 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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