Positive displacement blower fan, who delivered between air volume and the number of revolutions is proportional to the impeller end and front cover and fan impeller fan always keep a slight gap, driven synchronous wind gear rim into the wind from the fan housing the body wall to the side discharge conveyor. Fans do not need lubricating cavity blower direct, simple structure, stable operation, stable performance, adapt to a variety of uses blower wholesale, has used a wide range of fields. The main advantage of Roots blower. 1, steady wind. Roots blower fan is a fan constant prices, stable delivery uniform air flow. 2, long life due to engineering design and other aspects of the life of the Roots blower is long, at least 5 years, 10 years longer to achieve, and easy maintenance. 3, the air clean, small vibration. Since no oil, gas delivery will not be appropriate pollution blower outlets, Zhucheng Dong Han Machinery Co., Ltd. (certified), Roots blower is provided by the East Han Machinery Co., Ltd. Zhucheng. Zhucheng East Han Machinery Co., Ltd. (www.dhlcfj.com) is an industry leader in Shandong Weifang, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Zhucheng East Han Machinery Co. led the staff warmly welcome all inquiries negotiations to create Zhucheng East Han Machinery Co., a better future.