Tag Archives: perfluoroelastomer

Kalrez® O-rings for Hydrogen Sulfide Removal

Kalrez Perfluoroelastomer Seals: Authorized DistributorAmine treatment is a process typically used for Hydrogen Sulfide removal from natural gas (sour gas). This operation is commonly referred to as gas “sweetening,” acid gas removal, or amine scrubbing

Amine units are used all over the world in oil refineries and gas plants to remove hydrogen sulfide (H2S) from a product stream. New environmental standards are more strict and require ever-decreasing contents of H2S in clean natural gas. Most of the new sources of oil and gas discovered today have high contents of H2S which demand more efficient removal technologies (the Shah Gas field in the United Arab Emirates for example has up to 30%  H2S).

The Challenge of Amine Units in Harsh Chemical Environments

Amine units operate under harsh chemical environments. H2S for example, needs to be handled with care and can cause embrittlement of metal equipment. These processes also operate at high temperature where perfluoroelastomer sealing components are required. Amines, however, are known to be aggressive to many FFKMs. When elastomers are in contact with amines, they tend to swell to a high degree, which results in a loss of mechanical properties and extrusion. This can lead to leakage, rupture of the fluid film in mechanical seals due to face seal deformation, and an increase in torque needed to operate.

Solution: Kalrez 6380 for Lower Swell Properties

kalrez spectrum o-rings

DuPont™ Kalrez® Spectrum™ 6380 perfluoroelastomer parts offer outstanding resistance to amines because it exhibits four times lower swell over general purpose perfluoroelastomer (FFKM) offerings.

The use of DuPont™ Kalrez  Spectrum™ 6380 parts in these applications may extend the MTBR (Mean Time Between Repairs) of valves and pump mechanical seals and reduce leakage which can help contribute to reduce maintenance costs and lower emissions. The latest Kalrez 0090 parts represent another option for this application when high pressure resistance is needed. The following graph compares the chemical resistance of Kalrez Spectrum™ 6380 to other sealing materials when exposed to a typical amine/water mixture used in gas sweetening units.

picture of volume swell FFKM


Gallagher Fluid Seals is an authorized distributor and partner of Dupont Kalrez®. For more information or if you have a project / application where you need assistance, contact us today.

The original article was written by staff at Dupont and can be found here.

Kalrez® Spectrum™ 7275 Doubles Seal Life

Kalrez Spectrum 7275 is a perfluoroelastomer that provides long life sealing in an array of aggressive chemical environments that typically make sealing difficult: ethylene oxide, acrylic monomers, silanes and chlorosilanes, and strong oxidizers such as nitric acid, chlorine and chlorine dioxide.

It has demonstrated improved chemical and compression set resistance and mechanical property retention when compared to competitor’s elastomers.

Kalrez Spectrum 7275 is based on a proprietary cross-linking system, and is uniquely identified by its light brown shade.

Targeted applications include industries that depend on mechanical seals, pumps, valves, compressors, filtration columns and analytical equipment for their critical processes.


Success Story: Kalrez® Spectrum™ 7275 Double Seal Life in Chlorine Dioxide Service

Chlorine dioxide is a strong oxidizing gas that finds many uses as bleaching agent and disinfectant, being a more effective and safer biocide than other sources of chlorine. Most of the production of chlorine dioxide is used at paper mills for pulp bleaching.

picture of paper mill

A North American based paper mill had to perform frequent repairs in a pump handling chlorine dioxide in water. According to the reliability engineer, the incumbent non-black FFKM typically failed within 5 months of installation because of the extremely aggressive nature of the stream. With replacement of the seals by Kalrez® 7275, the pump seal life was extended to more than 12 months, removing the pump from the “bad actors” list and into a regular yearly maintenance.

Kalrez® Spectrum 7275, a specialty non-black perfluoroelastomer product, is made with a DuPont patented crosslinking system, and is suggested for seal applications where high resistance to oxidizing and reactive media is required.

picture of spectrum 7275 graph


The original article can be found on Dupont’s website here.

Gallagher Fluid Seals is a long-time partner of DuPont™, predominantly focusing on the Kalrez® line of products. For more information about Kalrez®, or a quote, contact Gallagher Fluid Seals today.

Kalrez® 1050LF General Purpose FFKM

kalrez 1050LFDuPont™ Kalrez® 1050LF perfluoroelastomer parts are a carbon black-filled general-purpose product for o-rings, seals, and other parts used in chemical process industries. It is a classic-grade and longtime favorite for premium performance and provides a more economical option than similar compounds such as 7375.

Kalrez 1050LF o-rings can maintain their recovery with elasticity following high-pressure applications, maintaining a tighter seal for longer periods of time compared to other compounds. With a pressure rating of 1,500 PSI, it can help extend seal life and integrity, ultimately lowering costs.

With above-average hot water and steam resistance, the maximum application temperature for 1050LF is approximately 550°F (up to 288°C). This compound is also known for its excellent amine resistance and compression set properties. It has a Shore A durometer of 82.

In addition, Kalrez 1050LF has excellent chemical resistance, with the ability to withstand contact of over 1,800 different chemicals, plasmas, and solvents.

In particular, this compound stands out for wet applications in semiconductor manufacturing – stripping and copper plating, which include:

  • Door/lid seals
  • Drain seals
  • Seals for chemical containers
  • Fittings
  • Seals for filters/connectors
  • Flow meters

This reliable compound from DuPont is classified as a general usage product. It is not recommended for use in organic or inorganic acids as high temperatures and is not recommended for applications that require rapid temperature cycling properties.


For more information about Kalrez 1050LF, or to see if it is a good fit for your application, contact Gallagher Fluid Seals today.

Gallagher Fluid Seals is an authorized distributor for DuPont™ Kalrez®.

Kalrez® 7375 Offers Outstanding Properties & Performance

Kalrez 7375 offers broad chemical and water/steam resistance

The newer compound from DuPont™, Kalrez 7375, is an innovative FFKM oil-seal product exhibiting broad chemical and water/steam resistance properties required at high temperatures in chemical process industry applications. Kalrez 7375 parts present excellent compression set resistance, exceptional physical property retention, and improved mechanical strength properties. Other Kalrez compounds have done the job over the years when faced with many of these sealing challenges, but how does it compare to this new compound?

Three ways that Kalrez 7375 would be a suitable upgrade or compatible compound for your application:

1. Kalrez® 1050LF is a classic grade and longtime favorite for premium performance. 1050LF end-users will likely see a performance boost if they switched to 7375, especially if used in steam or hot water applications.

2. If using Kalrez® 4079 or Kalrez® 7075 and broad chemical resistance is essential (including water/steam), 7375 could be a superior compatibility match resulting in enhanced longevity. 7075 offers the highest thermal capability but cannot support 7375’s chemical compatibility with steam. See table below:

Volume Change between different FFKMs after 672 hours of chemical immersion.

3. If lifetime issues or seeking to extend time between repairs are concerns when using Kalrez® 6375, end-users would most likely see a significant impact with 7375. However, transitioning to 7375 is not necessary if 6375 is executing up to standards.

Kalrez 7375 Benefits

  • Superior thermal stability of 572 °F (300 °C)
  • Excellent broad chemical resistance
  • Outstanding steam and water resistance
  • Available in most O-ring sizes: AS568, Metric, JIS (custom shapes upon request)
  • Combination of Kalrez® quality and Gallagher Fluid Seals’ customer service
picture of kalrez compression graph
Kalrez 7375 demonstrates excellent long-term compression set in hot air at 500 degrees Fahrenheit.

Product Description

DuPont™ Kalrez 7375 perfluoroelastomer parts are an innovative FFKM product based on a patented crosslinking system for chemical process industry applications where broad chemical and water/steam resistance are needed at elevated temperatures. Kalrez 7375 parts exhibit excellent compression set resistance, outstanding physical property retention, and good mechanical strength properties. A maximum application temperature of 300 °C is suggested.


The original article was featured on Dichtomatik’s website and can be found here.

Gallagher Fluid Seals is an authorized distributor of Kalrez products. For information about selecting the correct compound for your specific application, contact our engineering department.

Parker’s Low Temperature FFKM Provides Critical Oil & Gas Sealing Solutions

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

Original content can be found on Parker’s Website.


Oil & Gas Sealing Solutions with a Low Temperature FFKM

Technology advancements and new-to-world discoveries are constantly creating a new series of challenges for seal materials in the Oil and Gas industry. In today’s environments, seals are being pushed to perform in temperature, pressure and chemical extremes never before thought to be obtainable with rubber products. Application pressures exceeding 20,000 psi, service temperatures ranging from -40°F to upwards of 500°F, and exposure to some of the most aggressive media on the planet are placing immense amounts of stress on sealing elements. Parker’s FF400-80 compound has been formulated to provide a solution to all of these sealing challenges.

FF400-80 Compound – FFKM Product Features

  • Temperature range: -40° to 527°F
  • Best-in-Class low-temperature FFKM
  • Excellent compression set resistance
  • RGD resistant per ISO 23936-2 and TOTAL GS EP PVV 142
  • Sour service H2S resistant per ISO 23936-2
  • Maintained resilience at high pressures and low temperatures
  • Great for use in HTHP applications

Sounds great, but what’s the catch?

Continue reading Parker’s Low Temperature FFKM Provides Critical Oil & Gas Sealing Solutions

Kalrez® Parts Extend Service Life for Process Instrument

The Challenge

By switching from gasket seals of PTFE to custom gaskets of DuPont™ Kalrez® perfluoroelastomer parts in the sensor head of a process instrument refractometer used by the food, pulp and paper and chemical industries, process instrument manufacturer K-Patents Oy, Vantaa, Finland, was able to dramatically extend instrument service life, increase reliability and safety, and reduce costs for the company and its customers.

Instrument - Refractometer
Delicate digital detector circuits and fibre optics in the sensor head of K-Patents’“PR-01-S” process refractometer are sealed from attack by aggressive process media, temperatures from –20 ° to +220 °C, and pressures from –0,7 to +25 bar, by two DuPont™ Kalrez® gaskets situated either side of the vital Spinel prism

The Solution

Aggressive environment
Through permanent in-line fluids immersion, K-Patents’ “PR-01-S” refractometer is exposed to temperatures      from –20 ° to +220 °C, pressures from –0,7 to +25 bar, and some 500 process fluids and chemicals, many of which are extremely aggressive. Delicate digital detector circuits and fiber optics in the sensor head are sealed by two gaskets from attack by aggressive fluids. Because of inherent inelasticity, the original PTFE gaskets could not withstand the dynamic temperature fluctuations of many food, pulp and paper and chemical manufacturing processes, creating a leak path allowing process media to enter and damage the device. As a result, costly replacement of the PTFE seal became necessary approximately every 6–12 months.

Continue reading Kalrez® Parts Extend Service Life for Process Instrument

Parker ULTRA® FFKM for Semiconductor Applications

Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.


Semiconductor FFKM Offers Low Particle Generation AND Extreme Etch Resistance

Semiconductor Manufacturing - FF302In the world of semiconductor manufacturing, performance requirements are driving circuit sizes smaller and smaller, causing increased sensitivity to wafer defects. In parallel, the number of manufacturing steps has also increased driving a need for improved tool utilization and leaving more opportunity for these defects to be introduced. Identifying and eliminating the sources of defects is a tedious but necessary process to improve wafer yield.

What impact does seal contamination make?

One very distinct source of defects are the seals within a fab’s tool. Plasmas involved in both deposition, etch and cleaning processes utilize aggressive chemistries that put even high-functioning perfluorinated sealing compounds to the test. Much room for improvement has been left in this industry with many seal materials still posing significant threats to defectivity or downtime despite being designed for low particle generation or etch resistance.

How can Parker ULTRA change the industry?

Parker’s UltraTM FF302 Perfluorelastomer has proven success in CVD and etch applications, putting this material at the top of its class.  Typically, seal materials for semiconductor applications are optimized for low particulation or extreme etch resistance, however, Ultra FF302 provides both attributes in one material.  Laboratory testing shows Ultra FF302 has lower erosion in aggressive plasma chemistries even when compared to today’s leading elastomeric materials (Figure 1 below shows comparison erosion levels of various etch resistant perfluoroelastmers after exposure to Oplasma).

Continue reading Parker ULTRA® FFKM for Semiconductor Applications

NEW White Paper! Elastomer Seals for Instrumentation

Instrumentation - High Performance SealsGallagher recently released our High Performance Elastomer Seals for the Instrumentation Industry White Paper, available for download on our site.  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.

Introduction

The term instrumentation covers a wide variety of applications. In the broadest sense, instrumentation may be considered as any equipment used for measurements. This equipment may be in a process stream and include devices such as flowmeters, pressure gages, and inline probes. Data from these devices are used for process control. In automobiles, sensors are used for a variety of applications including measuring the exhaust stream to “tune” the engine to yield maximum performance. Analytical laboratory instruments such as chromatographs and flame ionization detectors are used to determine the composition of samples. Instruments are used in the medical industry for product analysis as well as analysis of blood and urine samples. Of course this is only a partial list of the many applications involving instruments.

Continue reading NEW White Paper! Elastomer Seals for Instrumentation

Semiconductor Manufacturing – Summary

Semiconductor Manufacturing - Wet Processes

NEW White Paper Available!

Gallagher Fluid Seals recently added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell.  Below is an excerpt from the new white paper discussing the key reasons to choose perfluoroelastomers over fluoroelastomers for semiconductor manufacturing.  You can download the white paper in its entirety by clicking on the thumbnail to the right.

 


Perfluoroelastomers (e.g. Kalrez® parts), often replace fluoroelastomer (e.g. Viton®) in semiconductor applications. However, even though perfluoroelastomers are the highest performance elastomers, there are still subtle differences between products. It is suggested that the elastomer supplier be contacted regarding the optimum product and seal design for specific applications. As mentioned above the key characteristics of perfluoroelastomers include:

  • Lower offgassing than other elastomers, especially at temperatures above 200°C, which lowers the risk of product contamination.
  • Better sealing force retention (lower compression set) at temperatures over 200°C, which is critical for longer service.
    Best overall chemical resistance of any elastomer family.
  • Formulations with extremely low particle generation in aggressive process environments.
  • Generally higher gas permeation than fluoroelastomers.
  • Higher coefficient of thermal expansion when compared to fluoroelastomers. Proper seal design will account for this and optimize performance.

Continue reading Semiconductor Manufacturing – Summary

Semiconductor Manufacturing – Wet Process

Semiconductor Manufacturing - Wet ProcessesNEW White Paper Available!

Gallagher Fluid Seals recently added a new white paper to its Resources Page, Perfluoroelastomers for the Semiconductor Industry, written by Russ Schnell.  Below is an excerpt from the new white paper discussing plasma process manufacturing.  You can download the white paper in its entirety by clicking on the thumbnail to the right.


Semiconductor Manufacturing - Wet ProcessesAlthough this is a smaller segment of the semiconductor chip manufacturing industry, it still plays an important role. Wet processes can be used in cleaning, etching, and other steps in chip manufacture. Wafers may be cleaned and rinsed after initial wafer preparation. This step removes residual particles and other contamination on the wafer surface. The wafer may then be exposed to chemicals for adhesion promotion and/or photoresist deposition. After photoresist is applied to the wafer surface, the wafer can be exposed to a number of photolithography steps. The wafer may then be exposed to liquid developer solutions and photoresist stripping solutions. Resist strippers usually involve aggressive acids or organic solvents. Finally, wet processes can also be used in etching processes, which typically involve strong acids.

Continue reading Semiconductor Manufacturing – Wet Process