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03/29/2019
Increased Performance for Pottorff Airfoil Blade Fire/Smoke and Smoke Dampers!
Pottorff is pleased to announce increased performance ratings for our airfoil blade smoke and combination fire/smoke dampers. These dampers are now UL approved for Class 1 leakage at 4000 fpm and 8" static pressure at a maximum assembly size of 96" x 48". This assembly size makes these dampers the largest in the industry. These ratings cover combination fire/smoke dampers rated to 1-1/2 to 3 hours and Class 1 or Class 2 leakage as well as smoke dampers rated to Class 1 or Class 2.
• Maximum Dynamic Closure Velocity: 4000 fpm
• Maximum UL 555S Rated Pressure: 8 in. wg.
• Class 1 and Class 2 UL 555S Rated Leakage
• AMCA Certified for Air Performance
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