Greenheck Expands Isolation Damper Line
August, 2024
Greenheck has expanded its line of isolation dampers with the new HBT-321 rectangular bubble-tight damper that is rated to 20 in. wg (5 kPa). Each HBT-321 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. The HBT-321 can withstand velocities up to 4,000 fpm and a temperature range from -40oF to 250oF. Available in sizes up to 48 in. x 42 in., the HBT-321 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, HBT-321 dampers can be supplied with a wide range of factory-installed actuators including electric, pneumatic, or manual actuator options.
Heavy-duty model HBT-321 features a fully welded frame, full-length axles, a field-replaceable sweep-style blade seal mechanically fastened to the blade, and a flanged damper frame for easy mounting. Designed for isolation or decontamination applications where leakage is critical, Greenheck’s HBT-321 bubble-tight damper is ideal for clean rooms, chemical and treatment plants, data centers, medical facilities, microelectronic manufacturing, bag in bag out (BIBO) filtration, laboratories, and testing facilities.
Greenheck, the worldwide leader in manufacturing air movement, control, conditioning, and distribution equipment, offers the largest selection of isolation dampers in the industry.
For more information, visit /products/air-control/dampers/bubble-tight-isolation-dampers/hbt-321
About Greenheck
Greenheck is a global leader in engineering and manufacturing air movement, control, conditioning, and distribution equipment. For more than 75 years, we have been committed to promoting the highest levels of indoor air quality by offering the widest range of ventilation products for commercial and institutional buildings. Through superior customer service, we continue our legacy of innovation as experts in air movement by connecting our mechanical representative partners and customers with the newest products. With our CAPS® product selection tool and HVAC University product education series, Greenheck offers technology and product knowledge to ensure that when you work with us, you are working with the easiest company to do business with.
To learn more, visit www.greenheck.com or contact Greenheck, P.O. Box 410, Schofield, WI 54476-0410, (715) 359-6171, FAX (715) 355-2399.