A northeast Germany refinery increased its MTBF by upgrading eight pumps.
Appropriate equipment selection and best-practice maintenance procedures can make a difference in reliability, service life and production.
A Russian oil & gas company produces a compressor station to maximize pipeline capacity.
This equipment eliminated a SAG copper mill gearbox’s maintenance issues resulting from contact lip seals that had a short and unreliable service life.
Mapping and testing ensure proper fit and function of replacement parts.
To optimize the lubrication of a bearing, proper oil viscosity selection is essential.
This article was written in response to the following question from a reader: Could you explain how an ANSI pump impeller’s clearance setting (both an open-vane impeller with back pump-out vane...
A shaft grounding ring and ceramic insulation can improve motor bearing life when VFDs are used.
Troubleshooting Bearings: A Structured Approach
Pumps and Systems, February 2007When evaluating bearing distress, the babbitted shoe surface is commonly the only area that is examined. Although a great deal of information can be extracted from the...
Babbit Bearing Repair for a Power Plant
Babbitt BearingsBabbitt bearings, frequently found in large steam turbines and generators in major power plants, can provide years of service if properly maintained. By using state-of-the-art...
Hydraulic Institute Pump FAQs March 2010
Q. Our pumps take their suction from an open tank. When the liquid level drops, surface vortices are formed that allow air to be drawn into the pumps. What changes can be made to the tank to correct...
Pumps & Systems, February 2009In this age of environmental consciousness, OEMs around the world are competing to build better, safer and greener machines. In striving toward such lofty goals, many...
Pumps & Systems, February 2008Maintenance and repair functions constitute a significant component of pumping system life cycle costs, especially in terms of energy consumption. The proper...
Pumps and Systems, February 2007Bearings perform vital roles in enabling optimized operation and service life of pumps used throughout industry. In centrifugal pump applications, for example, crucial...
It has been 54 years since Tracy Hall invented the first manmade diamond at the General Electric (GE) laboratories in Schenectady, New York. Since then, synthetic polycrystalline diamond (PCD) has...
Benefits from Proper Lubricant Monitoring and Analysis
Lubricants for rotating machinery primarily serve to separate rolling and sliding contact surfaces, protect highly finished bearing surfaces from corrosion, protect against contaminants (in the case...
What Makes Bearings Run Hot?
Pumps & Systems, February 2009In December 2008, we discussed some reasons ball bearings run hot. In December 2006 (ref. [1]), we described the common pitfalls of incorrectly dimensioning shafts...
Reliable Shock Pulse Evaluation of Anti-Friction Bearing Condition
Ensure proper bearing assessment and maintenance with this proven method.Of the methods used to assess the operating condition of rolling element bearings, one of the most successful and popular...
Pumps & Systems, May 2008For more than 100 years, machine parts composed of mechanical carbon have provided an alternative solution in applications where temperature and atmosphere prevent the use...
Reliability Improvements to a High Speed/High Energy Pump
Pumps & Systems, September 2007The pump is a 300-hp integrally geared propylene product pump in a Gulf Coast olefins unit that operates at 25,000-rpm and produces 6000-ft of head (see Figures 1...
Bearing Failure and Analysis
Rolling bearings are precision machine elements found in a wide variety of applications. They are typically reliable even under the toughest conditions. Under normal operating conditions, bearings...
Pumps and Systems, July 2009The initial cost of a pump is a small component of the pump's total life cycle cost. Progressive, proactive maintenance practices are vital to maximize pump life, minimize...
Advanced Bearing Materials for Processed Lubricated Systems
Pump manufacturers in a variety of industries are increasingly asked to deliver more with less; they need to handle increased loads with improved system efficiency but reduce envelope, environmental...
Pumps & Systems, May 2008Explore some of the issues associated with vertical pump bearings in general, and nonmetallic bearings specifically. Nonmetallic bearings may not be the best answer in...
Pumps & Systems, February 2009Rolling bearings play vital roles as the hearts of rotating machinery (pumps included) by supporting shafts, locating loads, enabling rotation and reducing friction....
Graphite and Nanocrystalline Diamond Surfaced Bearings
Low friction surface technology aids magnetic and hydrodynamic bearing reliability and failure resistance.Magnetic bearings have the advantage of non-contacting, super-low friction performance. With...
Greene, Tweed Provides Longer Life Bearings to a Major Nuclear Power Plant
Pumps and Systems Success Story of the Year 2010 WinnerWhen a component of a large circulating water pump fails in a power plant, the power plant must often spend hundreds of thousands of dollars...
Understanding the Basics of Pump Repair
Knowing the basics of pump repair can simplify preventive maintenance.Technical manuals with specifications like tolerance and pressures are important tools for troubleshooting hard-to-fix...
Guide Bearings Misdiagnosis
Guide bearings are often blamed for unrelated pump problems.Frequently, guide bearings are incorrectly blamed for a problem that has nothing to do with the bearings. Unless the bearings have a...
The Attraction of Magnetic Bearings
Magnetic bearing systems represent a different approach from rolling bearings to support rotating machinery, and in recent years, their benefits have attracted attention for more applications.As a...