Clover Roots blower inside and out thanks to the form of clover rotor structure and reasonable housing outlet structure, so the fan vibration, low noise. Impeller and shaft for the overall structure and impeller wear-free fan performance persistent, long-term continuous operation. Fan capacity utilization, high volumetric efficiency, and compact structure, flexible installation. Bearing selection more reasonable, each uniform bearing life, thus prolonging the life of the fan! Fans Viton seals made of imported materials, high temperature, wear-resistant, long service life. Models range to meet the needs of different users for different purposes. Shandong three cattle Machinery Co., Ltd.