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White Papers

Bearing Maintenance Practices to Ensure Maximum Bearing Life

Reliability of centrifugal pumps is heavily dependent on bearing reliability. The bearings that support the impeller shaft are complex machine components whose service life is directly affected by: Contamination (both […]

A Practical Guide to Machinery Shaft Alignment

Laser alignment is an essential component of a proactive maintenance strategy for rotating machines. This practical guide provides information and guidelines for the implementation of good shaft alignment of directly coupled rotating equipment including […]

Best Practices: Machinery Alignment Shimming

There is more to proper shimming of a machine for alignment than meets the eye. There are several things you should keep in mind.Some of these factors include shim material, […]

Soft Foot: Causes, Characteristics and Solutions

There is nothing “soft” about a soft foot—instead, it means machine frame distortion. The effects of machine frame distortion are numerous and potentially very damaging to the machine. This white […]

The Evolution of Successful Elimination of Electro-Corrosion in Mechanical Seals for Reactor- and Boiler Feed Water Pumps Handling Ultra-Pure Water

Since the introduction of mechanical seals in nuclear boiling water reactor (BWR) feed pumps operating with high drive ratings, keeping mechanical seal reliability high became a challenge. A problem also […]

Witness Testing of API 610 Centrifugal Pumps and API 611 Steam Turbines

The tutorial outlines the basic concepts and offers some tips on witness testing of API 610 centrifugal pumps and API 611 steam turbines. The section on API 610 pump testing discusses performance, NPSH […]

Leakage Detection and Containment in Arrangement 1 Seals

Mechanical seals are the most common means of sealing industrial centrifugal pumps. There are a wide variety of seal options including the use of single or dual seal arrangements. While […]

Breaking the Cycle of Pump Repairs

Achieving lowest possible life cycle cost (LCC) and value-optimized mean-times-between-repairs (MTBRs) are the undisputed goals of thoughtful pump users. Achieving these goals requires concentrating not only on pump hydraulics, but […]

Guidelines for a Systematic Evaluation of Centrifugal Pump Pressure Boundary Failure Modes and Their Mechanisms

This document contains recommendations of rigorous pump casing design techniques. A comparison of different design methods is made. The most sophisticated of these is then described in detail. Finally, a […]

An End-user’s Guide to Centrifugal Pump Rotordynamics

This tutorial outlines the basics of pump rotordynamics in a form that is intended to be Machinery End User friendly. Key concepts will be defined in understandable terms, and analysis […]

PumpTurbo: Advancements in Mechanical Sealing – API 682 Fourth Edition

This is a paper presented at the Twenty-Ninth International Pump Users Symposium in 2013. API 682 is the leading document for mechanical seals in petrochemical, chemical, and pipelines services worldwide. […]

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