Fluoroelastomers

  1. Parker's BRE Compounds Bridge Gap Providing Improved Properties Over FKM & Aflas®

    Fluids play a critical role in sustaining life. Keeping animals and humans hydrated and helping plants grow are obvious ways. Less obvious ways include moving cargo around the world and keeping equipment operating (hydraulic oils, coolants, engine oils, etc.). All these applications require seals of some sort ranging from public water systems to hydraulic pumps. What happens when these fluids become aggressive? People typically think of acids as being an aggressive media, but for many fluoroelastomers, bases are more aggressive presenting severe challenges.

    Using material science and technology, Parker has created a new class of Base Resistant (fluoro) Elastomer (BRE) compounds. 

    Read more »
  2. Is an ASTM Callout the Best Way to Specify Your Elastomer Needs?

    Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.

    Original content can be found on Parker’s Website and was written by Fred Fisher, Technical Sales Manager for Parker O-Ring & Engineered Seals Division.


    ASTM Elastomer Compounds

    elastomer materials pictureWhen looking at drawings to define a specific application or elastomer requirement: Is there value in using an ASTM

    Read more »
  3. How to Choose the Best Sealing Materials Based on Chemistry & Strong Oxidizers

    Strong oxidizers can damage metal, causing pitting or rust and treating possible safety concerns.

    In chemistry, strong oxidizers are substances (like chromic acid) that can cause other substances (like seals and gaskets) to lose electrons. So, an oxidizer is a chemical species that undergoes a reaction that removes one or more electrons from another atom.

    This causes a change in mass. Metals will turn into their respective heavier oxides, and the carbon in graphite will oxidize into carbon dioxide—which, although molecularly heavier, is a gas at room temperature.

    This happens in pumps, valves, pipelines or any other equipment that have seals and gaskets carrying a strong oxidizer. It will cause pitting or rust and, depending on your choice of seal material, may require shorter service intervals. Ultimately, you may have to look for a more suitable material that can handle strong oxidizers.

    More importantly, an oxidizing agent can cause or contribute

    Read more »
  4. Freudenberg Announces New Seals and Materials for the Aerospace Industry

    Freudenberg Sealing Technologies introduced several new material and sealing innovations at the 2019 International Paris Air Show.

    These new products are designed to help aerospace customers address ever increasing safety and performance requirements in the industry.

    During the June 17-23 event in Paris, Freudenberg showcased a new high temperature, fireproof material; an Omegat OMS-CS cap seal; and new ethylene propylene diene monomer (EPDM) and a fluoroelastomer (FKM) developmental material.

    “Our aerospace customers strive continuously to be faster, safer and more efficient, which in turn requires us to innovate to help them reach those goals – a challenge we enthusiastically embrace,” said Vinay Nilkanth, vice president, Global Mobility Sector, Freudenberg Sealing Technologies. “The launch of several new products aimed at improved performance underscores Freudenberg’s commitment

    Read more »
  5. The Rise of Metal Detectable O-Rings

    Food Safety Modernization Act (FSMA)

    Every year, nearly 1 in 6 people in the U.S. get sick (~48 million people), 100,000+ are hospitalized, and 3,000 die from foodborne illnesses or diseases, according to data from the CDC. Though this is largely a preventable problem, it still poses a significant public health burden.

    The FDA Food Safety Modernization Act (FSMA), enacted by Congress in 2011, is "transforming the nation’s food safety system by shifting the focus from responding to foodborne illness to preventing it."

    Although one might think the relevancy of the FSMA isPastries on a Conveyor Belt more geared towards the food or beverage product itself, this act is actually vital to the processing operations in food, beverage, and pharmaceutical industry.

    Over time, exposure to continuous vibration, volatile temperatures, and corrosive chemicals can cause O-rings in processing operations to become worn and eventually fail. When this occurs, particles of rubber from seals and gaskets can shear-off and migrate through sanitary systems, piping mechanisms, or by other means, eventually entering the product stream.

    In some cases when a problem is discovered, equipment must be shut down and visual inspections conducted to find the source of contamination. This leads to downtime, lost production, and lost revenue. If the contaminant ends up in the supply chain, even more risk is assumed due to recalls or litigation.

    Enter the metal detectable O-ring.

    Read more »
  6. Elastomer Seals for Instrumentation: Seal/Groove Design

    Seal Design: Instrumentation IndustryGallagher recently released our High Performance Elastomer Seals for the Instrumentation Industry White Paper.  This was written by Russ Schnell, an Elastomer Consultant contracted by Gallagher Fluid Seals, and a former Senior Application Engineer with the Kalrez® perfluoroelastomer parts business at DuPont.  This white paper is now available for download on our Resources page.

    Below is the third and final section of the white paper, which will discuss the importance of proper seal and groove design.


    Proper Seal & Groove Design

    Elastomer Seal: Perfluoroelastomer PartsProper seal design is a necessity for elastomer seals to perform reliably over the long term. Many of the instrument applications mentioned above use o-ring seals. The suggested compression for an elastomer o-ring seal to perform properly is typically a minimum of 16%, and a maximum of 30%. However, this range must also take into account the thermal expansion of an elastomer at elevated temperatures as well as any swell due to chemical exposure. Many of the elastomer seals used in instruments are small o-rings, which can create design issues. This is especially true for perfluoroelastomer parts which have a relatively high coefficient of thermal expansion (CTE). Fluoroelastomers have a lower CTE, making seal design easier at elevated temperatures.

    Read more »
  7. Elastomer Seals for Instrumentation: Laboratory Equipment

    Elastomer Seals for Instrumentation: Laboratory EquipmentGallagher recently released our High Performance Elastomer Seals for the Instrumentation Industry White Paper.  This was written by Russ Schnell, an Elastomer Consultant contracted by Gallagher Fluid Seals, and a former Senior Application Engineer with the Kalrez® perfluoroelastomer parts business at DuPont.  This white paper is now available for download on our Resources page.

    Below is the second section of the white paper, diving into applications where the measurement is made in analytical laboratories which employ numerous solvents in a wide range of analyses and test equipment.


    Laboratory Equipment

    The final set of instrumentation is laboratory test equipment. As opposed to the laboratories in chemical plants, which often perform the same routine analyses on plant process streams, general analytical labs employ numerous solvents in a wide range of analyses and test equipment. As such, the ability of seals to resist a breadth of chemicals without degradation or leaching contaminants into a sample is of great importance. Although instrument seals are easily replaced in a laboratory environment, this operation still takes a technician time. It is always easier if the system can be flushed with a cleaning solvent and then be ready to run the next sample versus having to change out an elastomer seal due to incompatibility with a solvent.

    Read more »
  8. Elastomer Seals for Instrumentation: In-Line Process

    High Performance Elastomer Seal for InstrumentationGallagher recently released our High Performance Elastomer Seals for the Instrumentation Industry White Paper.  This was written by Russ Schnell, an Elastomer Consultant contracted by Gallagher Fluid Seals, and a former Senior Application Engineer with the Kalrez® perfluoroelastomer parts business at DuPont.  This white paper is now available for download on our Resources page.

    Below is the first section of the white paper, diving into applications where the measurement is made at the process and the results then transmitted to a control system.  This section will review the four types of in-line measurement devices, all involving slightly different elastomer sealing applications.

    In-Line Process Applications

    Flowmeters

    Flowmeter - Elastomer Seal for InstrumentationFlowmeters are used to measure the flow of liquid. In this section we will only consider the measurement of liquid flow in a closed piping system. Several examples of flow measurement devices include: flowmeters, Venturi tubes and orifice plates.

    Note that these devices are “in-line” and require isolating the process line to remove and repair, or replace the measurement device. Shutting down a process to remove a device is time consuming, involves loss of production, and may require specific procedures to protect the operators and environment when a line is opened. All of these devices require seals to prevent leakage of the process to the environment and the elastomer seals should last the life of the flowmeter. For aggressive chemicals or high temperature applications, FKM or FFKM seals are an excellent choice. These products offer a long service life and resist deterioration in harsh environments.

    Read more »
  9. [VIDEO] How to Choose a Fluoroelastomer

    Fluoroelastomer Basics - Consideration When Choosing a FluoroelastomerGallagher Fluid Seals recently posted our new Fluoroelastomer Basics webinar on gallagherseals.com.  This is the third and final section of our webinar, focusing on Considerations When Choosing a Fluoroelastomer. The full video is now available on our Resources page.

    This video discusses considerations when choosing a fluoroelastomer, including temperature performance range, performance in harsh chemical exposure, and the need to take caution when using fluoroelastomer blends.

    [embed]https://youtu.be/ETuFwz88SB0[/embed]

    Read more »
  10. [VIDEO] Fluoroelastomer Materials

    Gallagher Fluid Seals recently posted our new Fluoroelastomer Basics webinar on gallagherseals.com.  This is the second section of our webinar, focusing on Fluoroelastomer Materials. The full video is now available on our Resources page.

    This section of the video discusses different fluoroelastomer materials, along with their mechanical and physical properties, and in which applications they're normally found.

    [embed]https://youtu.be/pukqRYUXtbw[/embed]

    Read more »
Page