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Four Most Popular Rotary Shaft Seals Material Options and How They Compare

Posted On March 05, 2016


Evolution of Seal Materials

The evolution of seal materials evolved as seals faced more rugged demands.  Early needs could be met using packed hemp or leather, but as the demands became more and more rigorous new materials were sought.  This led to the introduction of natural rubber seals, which evolved into synthetic elastomers, and finally engineering polymers like PTFE (Polytetrafluoroethylene).

Four of the most common modern material options for rotary shaft seal lips are nitrile rubber, polyacrylate, FKM, and PTFE.  Of these materials, three are elastomers – nitrile rubber, polyacrylate rubber and FKM – and only one is polymer – PTFE.  Let’s see how these materials stack up.

 

Want more about PTFE? Check out these artiicles from the popular Advanced EMC Technologies blog:

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Posted in: Polymer Seals, Sealing Solutions, PTFE Rotary Shaft Seals, PTFE

Six Things You Need to Know About Torlon Labyrinth Seals

Posted On December 05, 2015


High Performance Torlon

 

Torlon is a high performance amorphous thermoplastic, also known as polyamide-imide.  It has become a popular choice for labyrinth seals, especially in the area of reciprocating compressors.  In this article, you will be reminded of six things you need to know about Torlon.

 

 

Here are additional articles on Polymer Labyrinth Seals:

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Posted in: Sealing Solutions, Labyrinth Seals, advanced polymers, polymer solutions

Six Kinds of Polymer Jacket Materials for Spring-Energized Seals

Posted On August 04, 2015


Spring-Energized Seals Jacketing Material

 

polymer-spring-seal-jacket

When selecting a jacketing material for a spring-energized seal, engineers look at the

  • operating temperature,
  • pressure (including whether or not it is static or cyclic),
  • dynamic conditions,
  • media involved,
  • amount of seal squeeze,
  • and the geometry involved
In this article, we are going to look at some of the options out there for a polymer jacketing material.

 

Get even more information on Spring-Energized Seals from the following posts from Advanced EMC Technologies:

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Posted in: Polytetrafluoroethylene PTFE, Polyetheretherketone PEEK, Dynamic Sealing, Polymer Seals, Seals for Oil & Gas, Aerospace Seals, Sealing Solutions, Cryogenic Seals, UHMW Solutions, PTFE Seals, advanced polymers, Spring-Energized Seals, Teflon Seals

3 Key Factors For Spring-Energized PTFE Seals as First Choice in Oil & Gas Industry

Posted On May 13, 2015


Design and Selection of Appropriate Oil & Gas Seals:

As competition for natural resources increases, petrochemical companies have begun to look to new locations that pose new challenges – from arctic operations with low ambient temperatures to subsea equipment with high pressures and extreme temperatures.

In addition, companies face higher demands for safety, reliability, and environmentally-friendly designs and processes.  There is also the challenge of reducing the footprint of structures and equipment for exploration and production of oil and gas.  All of these factors combined have driven up the costs involved in exploration and production, and made the design of oil and gas systems far more complex. 

The design and selection of appropriate seals is key to many of these issues...

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Posted in: Industry News, Polytetrafluoroethylene PTFE, Polymer Seals, Seals for Oil & Gas, Sealing Solutions, PTFE Seals

Using PTFE and UHMW to Solve Big Problems in Food And Dairy Industry

Posted On April 27, 2015


Polymer Seals for Food & Dairy – PTFE and UHMW

Big challenges faced in the Food and Dairy Industry

There are several major issues faced in the food and dairy industry, including:

  • Temperature conditions that range from extremely high to cryogenic
  • Contamination
  • Exposure to harsh chemicals
  • Excessive moisture
  • Corrosion
  • Continuous sanitation regimens
  • Regulations
  • Expensive shutdowns

In these industries, simple thinks like lubrication of seals and bearings become major issues because of potential contamination.  Potential contaminants in the food and dairy industry are varied, ranging from lubricants, antimicrobial barrier fluids, insects, splinters of plastic or metal, to coolants. Even contamination at the microbial level can lead to very expensive recalls. 

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Posted in: Polytetrafluoroethylene PTFE, Polymer Seals, Sealing Solutions, Food Industry Polymer Components, Food & Dairy Industry, UHMW Solutions

Which is Superior for a PTFE Rotary Shaft Seal: A Metal Case or a Non-Metal Case?

Posted On March 23, 2015


INTRODUCTION:

The two main parts of a rotary shaft seal are a rigid outer case and the flexible sealing lip (typically made of an elastomeric material).  The outer case provides the stiffness and structure needed to keep the seal stable, and protects the lip during installation. 

A popular choice for the sealing lip is PTFE, better known as Teflon.  Its chemical compatibility, low friction, and outstanding performance at high speeds have made it a favorite among engineers.  However, what is the best case material to combine with a PTFE lip for rotary shaft seals?


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Posted in: Polytetrafluoroethylene PTFE, Sealing Solutions

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