Mechanical Seal vs Sealless Centrifugal Pumps

Approximately 88% of industrial process centrifugal pumps in the USA use mechanical seals which have been in commercial use since the 1920s. The concept of sealless magnetic drive centrifugal pumps has been around since the 1940s. In the past 30 years increased market demand for sealless pumps have driven pump manufacturers to continue to develop and evolve sealless pump designs. There are two primary types of sealless pumps; magnetic drive and canned motor pumps. This article will focus on magnetic drive pumps.

What key points should you consider in deciding whether your application is best suited for a pump with a mechanical seal or a magnetic drive sealless pump?

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Is Permeation Putting You at Risk?

Fluoropolymer linings or coatings for centrifugal pumps are a great solution for highly corrosive applications. However, simply selecting the right fluoropolymer coating is not enough to ensure that you will get a cost effective product that will perform maintenance-free for years.

The primary mechanism that reduces the life of fluoropolymer coated metal products (such as centrifugal pumps) is permeation. Permeation is the transfer of liquids or gases into and through the fluoropolymer lining. Continue reading