04/04/2012 | Autor / Editor: Xavier Rasotto / Wolfgang Ernhofer
Transfer pumps form a key part of any chemical plant. These pumps must operate reliably, often around the clock and handling a variety of corrosive or otherwise difficult materials. This article explains how to plan and carry out routine maintenance of centrifugal chemical pumps so as to avoid pump downtime and consequent lost production.
For decades, the commonest form of pump used in chemical-processing facilities has been the centrifugal pump. These versatile machines use a rotating impeller, propeller or rotor to impart kinetic energy to the fluid being pumped. As the fluid leaving the impeller is slowed by the stationary parts of the pump, this kinetic energy is then converted into pressure energy .
Centrifugal pumps are versatile, with the ability to handle a variety of challenges and potential problems, including:
The two most common styles of centrifugal pumps are:
Both of these pump types, and others, are available in ANSI format, which describes centrifugal pumps meeting the manufacturing criteria established by the American National Standards Institute in 1977 .
Robust as they are, centrifugal pumps will only perform at their best if operators provide the right kind of preventive and protective maintenance. This article will demonstrate how a strict maintenance routine can keep centrifugal pumps running reliably and economically in the harsh environment of a chemical plant.
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