Submersible pump to the three major U.S. company introduced the original, the renovation and development of the various series, and get a higher pump efficiency, head and flow. Submersible pump is a multi-stage centrifugal pumps, each level consists of a rotating impeller and a fixed guide wheel components, sub-float, and pressed both the impeller, the impeller pump displacement structure of the decision, the series decided to pump impeller the head.