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Allows for 2-way airflow adjustment
165° standard * All sizes utilize one main curtain stay * Galvanized finish h3
Installation Instructions * UL approved installation instructions
linkage and handle enclosed in valve to assure trouble-free operation
Pressure Relief Vertical Mount 3510-24X22 Accessories Allows for 2-way airflow adjustmenth3. 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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