A major concern of U.S. petroleum refineries and chemical process plants is regulatory compliance. Federal, state, special regulatory district and consent decree mandates require compliance of all...
Dynamic sealing technology has continued to advance in recent years, changing from off-the-shelf radial lip seal commodities to high-tech engineered products. As asset uptime and governmental...
Appropriate equipment selection and best-practice maintenance procedures can make a difference in reliability, service life and production.
Last month, "carbon/graphite fiber" braided packings were shown to be effective solutions to many common sealing applications. But the questions remain: Are there packing materials that can more...
Choosing Process and Separation Seals
Editor's Note: This is the third in a six-part series on seals. For other articles in this series, click here.Many factors must be considered when making this important decision.This installment...
This discussion opens a three-part series covering mechanical seal piping plans that provide guidelines for various seal arrangements, fluids and control equipment to help you determine what support...
Conclusion of our series covering applications in which they are used, why they are used, how they fail and things operators can check/do to maintain the performance of the seal flush plan. Plan 52 ...
Plan 12 Plan 12 is similar to a Plan 11. The flush is taken off of the pump discharge, or and intermediate stage in the case of multiple stage pumps, through a strainer or filter to remove solids,...
The balance between cost and ease of installation should be the major deciding factor.
Couplings play a critical role in wastewater processing. Take a look at how one wastewater facility combated coupling failure from exposure to UV radiation.   With a population of more than 8...
This equipment eliminated a SAG copper mill gearbox’s maintenance issues resulting from contact lip seals that had a short and unreliable service life.
From an overlooked stress concentration in the hull plating on a Liberty ship to the aero-elastic flutter of the original Tacoma Narrows Bridge, miscalculating small details has led to public...
Advances in diamond are bringing the well-known properties of the world's hardest material to mechanical shaft seals. Diamond has long been sought after as a seal face material because of its...
Most shaft seals are typically placed in bores made of steel, cast iron or other common ferrous metallic material. These ferrous, or iron-containing materials, are compatible with both metal cased and...
Dry Gas Seal Requirements
Editor's Note: This is the first in a six-part series on seals. For other articles in this series, click here.Find a reliable dry gas seal system for any application.As manufacturers continue to...
What are the advantages of these seals?
Critical IssuesThe mechanical seal industry, like the pump industry, will continue to face significant opportunities as well as challenges as we progress further into the globalized 21st century.Chief...
Efficiency Through Indirect Measures
Indirect factors can directly impact the true efficiency of the product-transfer process, if not considered and monitored.For months, the focus of the Pumps & Systems "Efficiency Matters" column...
Pump engineers have a wide range of sealing options available that cater to diverse pump applications. In designing pumps and other associated equipment like compressors and valves, elastomers are one...
Welded metal bellows seals continue to have success as a core sealing technology and have gained popularity recently in new innovative sealing technologies such as high-temperature non-contacting gas...
Editor's Note: The editors of Pumps & Systems were happy to spend some time with new FSA President Ed Marchese and FSA Technical Director Pete Petrunich to discuss FSA's role in standards...
To eliminate leakage, mechanical seals are the method of choice in sealing most pumps in ethanol plants. However, eliminating process leakage in rotating equipment does present many unique challenges...
Editor’s Note: The editors of Pumps & Systems spent time with incoming Fluid Sealing Association (FSA) President Greg Raty and FSA Technical Director Pete Petrunich to discuss FSA’s role in...
Initial costs and life cycle costs affect which sealing method is chosen for an application. If a sealing device cannot be considered an investment or will not produce an immediate return, there is...
Pete Petrunich retires as technical director after 17 years but leaves a legacy of education and high quality standards.
As environmental requirements become more stringent, FSA drives education and advocacy for sealing devices in the public policy arena.
FSA Sealing Sense
This article is related to an earlier Sealing Sense that answered the question "When and how do I use API Flush Plan 53?" (June 2005). Now we will focus on the three variances of Plan 53 (see Figure...
Compression packing used as a valve stem seal requires a compressive load. The appropriate compressive load can be accomplished by the most common method—to compress the packing by a fixed...