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Critical Ball Valve Seats: Recommended Materials

Posted On August 25, 2017

 

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

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

The Seven Sides of PTFE (or, why PTFE is way cooler than most realize) by Poly Fluoro

Posted On January 09, 2017


We think this blog post by Poly Fluoro provides a great overview of the strengths and attributes of PTFE in a variety of applications. We've reprinted it below in its entirety so that you can benefit from the article as well. You may view the original on Poly Fluoro's website, here.

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Posted in: Polytetrafluoroethylene PTFE, PTFE

Fillers and Additives to Enhance the Tribological Properties of PTFE

Posted On September 14, 2016


PTFE has the lowest coefficient of friction of any polymer known to mankind. However, once we’ve added the fillers and additives needed to improve its mechanical properties, it may not have such low friction.


Image Source

Consider this: virgin PTFE has a coefficient of dynamic friction on the order of 0.04 to 0.06, but adding carbon fiber raises it up to 0.18 and glass can raise it up to 0.5 (yes, about 10x more friction). Fortunately, there are fillers and additives that can improve the coefficient of friction, and we're going to take a look at some of the more common ones.

MoS 2

One additive that works wonders for bring the coefficient of friction down is Molybdenum disulfide, sometimes referred to in the industry as Moly. When added to PTFE with 15% glass fiber, the coefficient of friction goes from 0.5 to 0.15, which is much closer to virgin PTFE. When added to PTFE, Moly is typically combined with bronze or glass to reduce friction and improve wear characteristics.

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Posted in: PTFE, PTFE Fillers

What Engineers Should Know About Polymer Seals and Outgassing

Posted On August 10, 2016

You know that wonderful new car smell? There’s a name for that phenomena: outgassing.

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Posted in: Polymer Seals, PEEK, PTFE

Beginner’s Guide to PTFE and PEEK Backup Rings

Posted On August 05, 2016


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.

Continue reading →

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

Polymer Seal Applications in the Oil Fields

Posted On July 22, 2016

The oil industry is rough on seals as companies are forced to drill deeper where the reserves themselves are at high temperatures and pressures in an unforgiving, aggressive chemical environment. What makes sealing solutions in these kinds of applications so challenging is how exposure to heat and chemicals can affect the long-term performance of a seal.

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Posted in: PTFE Seals, PEEK, PTFE

7 Reasons You Should Look at PTFE Bushings for High Speed, High Temperature Applications

Posted On July 19, 2016

PTFE, better known by its DuPont tradename of Teflon, is a popular choice for polymer bearings and bushings – especially for applications involving high speeds and high temperatures. In this blog post, we will look at seven reasons why this is so.

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Posted in: Polymer Bushings, PTFE, PTFE Bushings

5 Reasons Why PTFE Seals are an Excellent Choice for Automotive Applications

Posted On May 27, 2016


Automotive PTFE Shaft Seals

In this article, we are going to explore the reasons why PTFE seals are among the best choices for many automotive applications.  You’ll find PTFE seals in fuel cell seals, fuel injection pumps, steering wheel seals, air conditioning, compressor seals, hydraulic seals, and more.  We’re going to focus our attention on PTFE shaft seals.  Let’s take a look!

 

Want more great articles on PTFE Shaft Seals, check it out from the Engineer's choice Advanced EMC Technologies Blog:

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Posted in: Polytetrafluoroethylene PTFE, PTFE Seals, PTFE Rotary Shaft Seals, PTFE

4 Reasons: PTFE Rotary Shaft Seals for Low Friction High Speed Applications

Posted On April 22, 2016


PTFE Excellent Solution

PTFE rotary shaft seals are an excellent solution to high speed applications with surface speeds up to 30 m/s.  In this article, we are going to look at four reasons behind that continued popularity.

 PTFE-Polytetrafluoroethylene-Rotary-shaft-seals.jpg

 

Here are some additional articels on PTFE Rotary Shaft Seals from the Advanced EMC Technologies Blog:

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Posted in: Polytetrafluoroethylene PTFE, PTFE Rotary Shaft Seals, PTFE

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