Centrifugal pump has some shortcomings: (1) poor self-priming capability, easy to take the time out; (2) less than the rated flow for small flow operation, the pump efficiency is low; (3) used in the delivery of a variety of low viscosity liquids , The viscosity of the greater impact on the performance of the pump. OF: natural Yixing special Pump Co., mainly produced filter for pumps, the suction-type slurry pump, high wear-resistant crystallized glass pump, zinc smelting ultrahigh molecular weight polyethylene wear and corrosion characteristics of a stirring blade, etc. Pump products