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About product and suppliers:
        Alibaba.com offers 989 butterfly damper products. About 62% of these are valves, 17% are hvac systems & parts, and 1% are other furniture hardware. 

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

There are 898 butterfly damper suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and United Arab Emirates, which supply 98%, 1%, and 1% of butterfly damper respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 381 with ISO9001, 362 with Other, and 70 with ISO14001 certification.