This series of pumps are single-stage multi-purpose submersible pumps. They are divided into three series: 50, 70, and 80 according to flow rate. Their installation forms have different specifications and lengths. They are available with or without discs (single tube or double tube). The flow range is 15-80m³/h, the lift range is 3-25m, and the pump length is 1-6m. It is widely used in papermaking, environmental protection, graphite, ceramics, chemical industry, brewing, construction, oil refining, mine drainage and fluids containing mud, etc.