... corrosion 3.Precision Casting 4.ISO 9001:2000 Standa Submersible pump to the three major U.S. company introduced the ... and development of the various series, and get a higher pump efficiency, head and flow. Submersible pump is a multi-stage centrifugal ... sub-float, and pressed both the impeller, the impeller pump displacement structure of the decision, the series decided to pump impeller the head.