Tobee 300TV-SP Vertical Slurry Pump is designed to be immersed in liquid for conveying abrasive, coarse particles, dirty water and particle contaminated water. Due to the design of the pump assembly, a shaft seal is not required and the pump can be operated in conditions that most pumps would have a low service life and their seal arrangement would not be effective. Design Features: Fully Cantilevered - Eliminates submerged bearings, packing, lip seals, and mechanical seals that other vertical slurry pumps typically require. Impellers - Unique double suction impellers; fluid flow enters the top as well as the bottom. This design eliminates shaft seals and reduces thrust load on the bearings. Large Particle - Large particle impellers are also available and enable passing unusually large solids. Bearing Assembly - The maintenance friendly bearing assembly has heavy duty roller bearings, robust housings, and a massive shaft. Casing - The metal pumps have a heavy walled abrasive resistant Cr27Mo chrome alloy casing. Rubber pumps have a molded rubber casing adhered to sturdy metal structures. Column and Discharge Pipe - The metal pump columns and discharge pipes are steel, and the rubber columns and discharge pipes are rubber covered.