Vertical sump pump: no need of any shaft seal and sealing water. and can also be operated normally for insufficient suction duty Vertical slurry pump: Shijiazhuang Naipu Pump Co.,Ltd is a professional manufacturing enterprise of slurry pumps. 1 Design: Fully elastomer lined or hard metal fitted. No submerged bearings or packing. High capacity double suction design. Optional recessed impeller ...