EPN series sand pump used for ship and land is an impurities pump which is designed according to the Two-phase flowing theory. It includes: 250EPN-30, 250EPN-35, 250EPN-40, 250EPN-24, 250EPN-32, 250EPN-45, 400EPN-22. This pump is made after test and industrial run test, with the hydraulic high efficiency, good wear resistance characteristics. It has stable performance when transport the medium contains the solid particles. The pump applies to inland river dredging, coastal dike building and coal mining, mines, power plants and other enterprises conveying solid particles containing the slurry, such as, transmission media can reach more than 40% concentration, dielectric particles up to 50 mm. In recent years, this pump is widely used for desilting the pumping sand ship, blowing the sand barge, and land-based relay booster for long-distance transport of mud. At the Yellow River Basin, Shanghai, Zhejiang, Tianjin, Tangshan and other places.