ANSI/HI 5.1-5.6-2010, from the Hydraulic Institute (HI), is designed to provide users with information necessary to define and describe the construction features and benefits of using sealless pumps and contains a number of significant updates and enhancements. These include: pump part names and definitions, magnetic temperature limits and motor insulation temperature limits, magnetic drive pumps mounting specifications, and new monitoring device information. In addition, the new standard provides users with expanded information in the test sections that cover types of tests, parameters, procedures, and acceptance criteria.

Gregg Romanyshyn, technical director of HI said: “Sealless pumps are typically used when there is a need to contain toxic, dangerous, or valuable liquids or when specific applications warrant their use. Application may be dictated by environmental, safety, noise, or space concerns. Canned motor pumps and magnetic drive pumps both have a driven shaft that is completely contained within a pressurized boundary that contains the pumped liquid. Shaft loads are supported by product or external flush liquid-lubricated bearings. This configuration minimizes the chances for leakage because there is no shaft penetration of the pressure containment boundary.”