LNG applications can be challenging, with cryogenic temperatures and extreme temperatures combining to create a nightmare for your typical seal. However, there are excellent, reliable sealing solutions for LNG applications.
Custom Spring Energized PTFE Seals for Medical Devices
The medical device industry faces continually evolving challenges when it comes to finding the right
sealing solutions for new and improved designs. Issues such as sterilization, wide ranges of expected
pressure, potentially aggressive environments, and FDA and USP approval make the design and
specification process quite challenging. In this article, we are going to look at custom spring energized PTFE seals as a potential solution for sealing challenges in the medical industry.
A Short Guide to Seals and Shelf-Life
Many items have a limited shelf-life, from dairy products to medications to seals?
What Engineers Should Know About Polymer Seals and Outgassing
You know that wonderful new car smell? Theres a name for that phenomena: outgassing.
Beginners Guide to PTFE and PEEK Backup Rings
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 isnt 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.
3 Hints for Selecting a Radial Shaft Seal for a Bearing
A radial shaft seal (also known as a rotary shaft seal, rotary seal, or radial lip seal) is used in situations involving dynamic rotary motion. This type of seal can be used to achieve three different objectives in a machine:
Most Common Causes of Polymer Seal Failure
In this article, we are going to look at five of the most common phenomena involved with polymer seal
failure, and what causes are behind the failure. Lets start with extrusion.
Extrusion
One of the common causes of seal failure is extrusion. If the extrusion took place on the static side of
the seal, then either the back-up ring is too small or the support surface is somewhat uneven. If it is
extruded on the dynamic side, then there could be one of three causes: extreme pressure, worn
bearings, or too large a gap between the mating surfaces.
Fracturing
Fracturing can take several forms, such as chunks missing or long cracks. If you see entire chunks
missing from the dynamic side, the cause is most likely excessive back pressure. If you see the pressure side of the seal broken and burned, the cause could well be the explosion, at high pressure, or residual air. Long cracks appearing in the V-portion of a seal can result from frequent spikes in pressure or too low a temperature at system start up.
Polymer Seal Applications in the Oil Fields
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.
7 Reasons You Should Look at PTFE Bushings for High Speed, High Temperature Applications
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.
6 Key Reasons PEEK Works Well for High Performance Bushings
PEEK, which stands for polyetheretherketone, is a well-known engineering thermoplastic. It has become a popular choice for bushings that must operate in demanding high speed, high temperature environments.
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