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4 Key Challenges in Cryogenic Seal Design - Part 1 of a 3 Part Series

Posted On March 06, 2019

 

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Posted in: Cryogenic Seals

Cryogenic Sealing Challenges: Fluids Near Their Boiling Point

Posted On October 31, 2018


Sealing in a cryogenic environment is hard enough, but when it involves fluids that are being stored or processed near their boiling point, it opens up a whole new set of challenges.

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Posted in: Cryogenic Seals, Labyrinth Seals

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

Importance of Spring Energizer Design in Cryogenic Sealing

Posted On March 31, 2017

 
Cryogenic seals are required in a variety of industries, including LNG fueling systems, specialty gas manufacturing, cryo coolers, radio astronomy, scientific instrumentation, pharmaceutical research, and many more.  One of the most reliable sealing solutions for cryogenic applications are polymer spring-energized seals.  In this blog post, we are going to review spring-energized seals and then discuss what the recommended spring configuration is for cryogenic applications.

Source

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Posted in: Cryogenic Seals, Spring-Energized Seals

The 3 Most Popular Spring Energized Seals Materials for Cryogenic Sealing Applications

Posted On March 30, 2017


Cryogenic sealing applications are challenging, to say the least.  One popular solution is the use of spring-energized seals, and in this blog post we are going to talk about the 3 post popular materials used for spring-energized seals for cryogenic applications: PTFE, modified PTFE, and UHMW PE.


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Posted in: Cryogenic Seals, Spring-Energized Seals, UHMW, PTFE Spring-Energized Seals

Cryogenic Seals for LNG Marine Loading Arms

Posted On November 22, 2016


One of the major challenges in working with LNG (liquefied natural gas) is transporting it. LNG is stored and transferred at cryogenic temperatures – which can be a major challenge when it comes to designing seals.

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Posted in: Seals for Oil & Gas, Cryogenic Seals

Cryogenic Seals for LNG Applications

Posted On August 19, 2016


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.

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Posted in: Cryogenic Seals, PTFE Spring-Energized Seals

PTFE Seals for Extreme Temperatures

Posted On July 07, 2016

PTFE (polytetrafluoroethylene, tradename Teflon) is a polymer material commonly used in sealing applications that offers unparalleled stability and sealing characteristics across an extremely wide range of temperatures, as shown in the table below.

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Posted in: Cryogenic Seals, PTFE Seals

PTFE Spring-Energized Cryogenic Seals Revisited

Posted On January 29, 2016


Cryogenic Seals

Cryogenic seals must not only handle unbelievable low temperatures, but also perform under high pressure conditions.  If you aren’t familiar with cryogenic seals, a cryogenic seal is a special type polymer seal used with media at temperatures below -238°F and down to -460°F (absolute zero).  Cryogenic seals can be found in a variety of industries, from LNG compressors and loading arms in the petroleum industry to rocket propulsion systems in the aerospace industry.

 

 

Other important articles on Cryogenic Seals from Advanced EMC Technologies:

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Posted in: Dynamic Sealing, Polymer Seals, Cryogenic Seals, PTFE Seals, polymer solutions, mechanical loading arm

Dummy’s Guide to Cryogenic Loading Arm Seals

Posted On September 07, 2015


Mechanical Loading Arms

Loading arms are flexible piping systems used to transfer chemicals to railcars, trucks, tankers,
 ships, and barges.  If the loading arm is going to be used for transportation systems such as trucks or railcars, they will either be top-loading or bottom-loading.  For ships and barges, marine loading arms (also known as mechanical loading arms - MLA) are used.

These loading arms have swivels joints, which is what enables the piping system to be flexible.  The swivel joints typically have, a split flange design to make it easy to swap product seals without having to disassemble the entire swivel joint.  The swivel joints are usually made of stainless steel, while the mechanical seals used are polymeric or elastomeric. 

In many designs you will find a nitrogen drying system included. This consists of a cavity located between two the product seals into which nitrogen is injected.  The purpose of the nitrogen is to prevent the product from being contaminated by moisture from the atmosphere.

For more information on Cryogenic seals check out the following posts from the Advanced EMC Technologies Blog:

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Posted in: Polytetrafluoroethylene PTFE, Cryogenic Seals, PTFE Seals

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