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When to Use PEEK, PTFE or Nylon Backup Rings

Posted On March 13, 2018

Backup rings, also known as anti-extrusion rings of BURs, do exactly what their name implies: they act as back up support to sealing assemblies.

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Posted in: BUR, back up ring

Cryogenic Seals for Loading Arms

Posted On March 02, 2018

More and more industries are using cryogenically cooled liquids and gases, which is increasing the demand for transfer systems that can handle those kinds of temperatures.

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Posted in: Cryogenic Seals

Finite Element Analysis of Seals, Part 2: Creating the Model

Posted On February 13, 2018

One of the first hurdles to overcome in developing an accurate finite element representation of a real world problem, including rotary shaft seals, is developing the model of the components whose behavior and interaction you want to investigate.

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Posted in: Finite Element Analysis

Finite Element Analysis of Seals, Part 1

Posted On January 25, 2018

Because of the rapidly improving technology of computers, more and more can be done using finite element analysis methods -- including the modeling of
rotary shaft seals.  

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Posted in: Finite Element Analysis

Factors Influencing Rotary Shaft Seal Performance: Pressure, Velocity, and Temperature

Posted On September 22, 2017

There are various factors that have a significant impact on the performance and behavior of a rotary shaft seal, including operating conditions (speed, pressure, temperature, environment), the mating shaft (hardness, surface finish, lead), and the choice of material for the seal itself.

In this blog post, we are going to review the operating conditions that must be considered for a successful rotary shaft seal.

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Posted in: PTFE Rotary Shaft Seals

Metal Seals for the Aerospace Industry

Posted On September 08, 2017

The aerospace industry has some of the most exacting requirements for seals of any other industry.

In this blog post, we are going to take a closer look at the type of requirements for metal seals used in the aerospace industry, where they are used, and what types of materials are typically involved in metal seals used in the aerospace industry.

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Posted in: Seals for Aerospace, Metal Seals

Critical Ball Valve Seats: Recommended Materials

Posted On August 25, 2017


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Posted in: Ball Valve Seats and Seals, PEEK, PTFE

Four Fast Facts about PTFE Bellows

Posted On August 04, 2017


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Posted in: Bellows & Diaphragms

Composite Bushings & Bearings: 3 Benefits

Posted On July 07, 2017


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Posted in: Bushings and Bearings

Beginner’s Guide to PTFE and PEEK Backup Rings

Posted On June 29, 2017

Backup rings can be made from a variety of materials, including polymers. In this article, we will look at PTFE and PEEK backup rings while at the same time reviewing some of the basics of backup rings.

Why Use Backup Rings?

Rubber o-rings are good, but when temperatures and pressures rise they have a bad habit of extruding into clearance between mating surfaces, which isn’t a good thing. In fact, extrusion failure is one of the main causes of o-ring failure. As the o-ring begins to extrude into the clearance gap, it will experience more and more damage until it is useless. This phenomenon is sometimes called nibbling, and when it occurs you will notice that the o-ring will have a ragged edge on the low-pressure side.

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Posted in: PEEK, BUR, back up ring, PTFE

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