R221 Roots fan, R222 Roots fan model Roots fan is the introduction of foreign advanced technology, combined with its own long-term fan production of rich experience, professional research and development of high-tech optimization design and become. From the external casing to the internal small parts, all the use of foreign standard parts, its quality and performance have reached the world's leading level.

R221 Roots fans and R222 Roots fans are generally used for conveying clean air. They are also involved in many fields such as oxidation fans, aquaculture, liquid atomization, solution mixing, flue gas desulfurization, and so on.