« Back to Facilities Management News Home
The new HBT-321 rectangular bubble-tight damper that is rated to 20 inches in water gauge (five kPa). Each damper unit is factory-tested to ensure bubble-tight leakage performance per AMCA 500-D prior to shipping and also meets ASME AG-1, Class 0A requirements. It can withstand velocities up to 4,000 feet per minute and a temperature range from –40 degrees Fahrenheit to 250 degrees Fahrenheit. Available in sizes up to 48 inches by 42 inches, it allows larger openings to be filled with one pre-engineered damper to provide zero leakage rather than a multi-section assembly that can add significant pressure drop to the system. In addition, these dampers can be supplied with a wide range of factory-installed actuators including electric, pneumatic or manual actuator options.
