1. sand dredging, hydraulic reclamation, channel cleanout 2. good wear-resistan 3.high efficiency and obvious energy-saving marine sand dredging pump is designed in the reference of two phase flow theory. It has the following models: 250EPN-30, 250EPN-35, 250EPN-40, 350EPN-24, 350EPN-35, 350EPN-45 and 400EPN-22. Through the experiments and operation tests, the pump has the characteristics of high ...