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About product and suppliers:
        Alibaba.com offers 730 butterfly damper products. About 29% of these are hvac systems & parts, 1% are other furniture hardware. 

A wide variety of butterfly damper options are available to you, such as hvac systems, ventilation. You can also choose from free samples, paid samples. 

There are 724 butterfly damper suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and United Arab Emirates, which supply 96%, 2%, and 1% of butterfly damper respectively. 

Butterfly damper products are most popular in Domestic Market, Mid East, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 547 with ISO9001, 344 with Other, and 61 with ISO14001 certification.