Why don’t my PTFE gaskets seal FRP, plastic and other light load flanges?
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Top Seals Articles
Find a reliable dry gas seal system for any application.
First of Six Parts
Follow the major developments in seal technology
This month's "Sealing Sense" was prepared by FSA member Larry Sheffield.
Proper safety precautions for selecting, installing and maintaining seal systems
In hydraulic cylinders, used in everything from precise positioning equipment in machine tools to heavy earth moving machinery in the toughest working environments, the requirements for sealing are varied and difficult.
The research and understanding of other's experiences, specifications and financing related to the decision can make the difference between a great experience and an expensive disappointment.
Multiphase pumping applications, also referred to as tri-phase, have been growing during the past several years, especially due to increased oil drilling activity. For example, in Canada the drilling and refining of tar sands often requires the use of multiphase pumps since the fluid stream can be a mixture of gas, liquids and solids.
These graphite-loaded silicon carbide materials have been around for several years, and new applications are regularly identified. Initially, they were developed to address the highest P-V applications, with a focus on the highest pressures.
For many years, industry has recognized the inherent benefits of braided packings produced from PTFE fiber. Low coefficient of friction and outstanding chemical stability make it well-suited for sealing aggressive fluids in rotating equipment—such as agitators, mixers and pumps.
Latest Seals Articles
Why don’t my PTFE gaskets seal FRP, plastic and other light load flanges?
Find a reliable dry gas seal system for any application.
First of Six Parts
Follow the major developments in seal technology
This month's "Sealing Sense" was prepared by FSA member Larry Sheffield.
Proper safety precautions for selecting, installing and maintaining seal systems
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 rubber covered seals.
These basic seal system considerations can significantly reduce the energy footprint of the seal face interaction. Their contribution to the overall sealing system energy footprint should be considered after review of all the components of the sealing system's energy footprint.
Maintaining equipment uptime in a mining operation is essential. For one of South American's largest sulfurated copper mining organizations, unreliability simply wasn't acceptable, so they turned to one seal manufacturer to develop a pump sealing system improvement program using the Six Sigma methodology.
The research and understanding of other's experiences, specifications and financing related to the decision can make the difference between a great experience and an expensive disappointment.
In hydraulic cylinders, used in everything from precise positioning equipment in machine tools to heavy earth moving machinery in the toughest working environments, the requirements for sealing are varied and difficult.
Columns and Blogs
In this multi-part series, we will investigate several aspects of centrifugal pump efficiency.
First of Five Parts
Since the original publication of this draft standard in the January 2008 issue of Pumps & Systems, I have received feedback, encouragement, numerous questions and criticism. The draft listed three basic levels of repair.
The McGraw-Hill scientific dictionary [5] states that a volute is "a spiral casing for a centrifugal pump... designed so that speed will be converted to pressure."
