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About product and suppliers:
        Alibaba.com offers 739 butterfly damper products. About 60% of these are valves, 25% are hvac systems & parts, and 1% are suspension system. 

A wide variety of butterfly damper options are available to you, such as free samples, paid samples. 

There are 734 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 419 with ISO9001, 368 with Other, and 59 with ISO14001 certification.