Kalrez
DuPont Kalrez® and Vespel® Center of Excellence
When sealing matters, choose DuPont Kalrez® and Vespel® products. DuPont™ Kalrez® and Vespel® work with customers to bring state of the art technology to solve customers’ toughest application challenges.
Kalrez® Sealing Technologies
From aerospace and chemical processing to chip manufacturing and oil and gas applications, DuPont™ Kalrez® elastomers are engineered to provide more stability, more resistance, and more effective sealing. Period.
DuPont Kalrez® and Vespel®
Perfluoroelastomer parts have been the sealing material of choice for long-term reliable sealing in the harshest chemical environments. Today, elastomeric seals are expected to perform in a variety of even more aggressive chemicals and at higher temperatures.
Kalrez® 0090 parts for Rapid Gas Decompression
DuPont scientists developed Kalrez® 0090 perfluoroelastomer parts for outstanding resistance to repeated rapid gas decompression.
Products (46)
Kalrez
Kalrez® 4079
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® 4079 perfluoroelastomer parts are a low compression set product for general purpose use in O-rings, diaphragms, seals and other parts used in the chemical process and aircraft industries. It is a carbon black filled product with excellent chemical resistance, good mechanical properties, and outstanding hot air aging properties. It exhibits low swell in organic acids, inorganic acids and aldehydes, and has good response to temperature cycling effects. A maximum service temperature of 316°C (600°F) is suggested, with short excursions to higher temperatures possible. Kalrez® 4079 is not recommended for use in hot water/steam applications or in contact with certain hot aliphatic amines, ethylene oxide, or propylene oxide.
Kalrez
Kalrez® Spectrum™ 7375
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® Spectrum™ 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® Spectrum™ 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.
Kalrez
Kalrez® Spectrum™ 4001
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® Spectrum™ 4001 perfluoroelastomer parts are a non-filled product which is well suited for selected high purity applications in the semiconductor industry and other markets. Kalrez® Spectrum™ 4001 has excellent chemical resistance, exhibiting low swell in organic acids, inorganic acids, esters, ketones, and aldehydes. It also offers low hardness and good mechanical properties. While Kalrez® Spectrum™ 4001 is a non-filled perfluoroelastomer, the color is black. A maximum service temperature of 275°C (527°F) is suggested.
Kalrez
Kalrez® Spectrum™ 7275
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® Spectrum™ 7275 parts are a light brown product based on a proprietary crosslinking system targeted specifically for the chemical processing industry. It exhibits minimal swelling and improved retention of physical properties when exposed to aggressive chemicals, e.g., concentrated nitric acid, organosilanes, chlorosiloxanes, pure ethylene oxide, butyraldehyde, amines and vinyl and acrylic monomers. It also has excellent compression set resistance and good retention of physical properties after aging at high temperatures. A maximum service temperature of 300°C is suggested.
Kalrez
Kalrez® Spectrum™ 7090
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® Spectrum™ 7090 perfluoroelastomer parts are specifically targeted for use in applications requiring high hardness/higher modulus properties. These specialty black parts have excellent mechanical properties including compression set resistance, seal force retention, response to temperature cycling effects and rapid gas decompression resistance. Kalrez® Spectrum™ 7090 perfluoroelastomer parts are well suited for both static and dynamic sealing applications, especially applications that require extrusion resistance at higher temperatures. They also offer outstanding thermal stability and chemical resistance. A maximum service temperature of 325°C (617°F) is suggested. Short excursions to higher temperatures may also be possible.
Kalrez
Kalrez® Spectrum™ 6380
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® Spectrum™ 6380 perfluoroelastomers parts are a non-black product specifically developed for chemical processes involving hot, aggressive amines. In addition, it has excellent overall chemical resistance (see chart below). This cream colored product is easily identifiable when selecting an O-ring material for harsh chemical plant services. This material has excellent mechanical properties and is a top choice for both static and dynamic sealing applications. A maximum service temperature of 225°C is suggested while short-term excursions to higher temperatures are permissible.
Kalrez
Kalrez® Spectrum™ 6375
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® Spectrum™ 6375 is designed to give outstanding performance in the widest possible range of chemicals and temperatures. Mixed streams, once a problem for many chemical processors, can now be handled by 6375, furthermore, the curing system also allows for a maximum service temperature of 275°C (525 °F) which translates to increased chemical resistance over all temperature ranges, especially if high temperature process excursions occur. This combination of chemical and thermal resistance provides advantages for chemical processors. Kalrez® Spectrum™ 6375 is a carbon black-filled product for general use in O-rings, seals, diaphragms and other parts specifically for the chemical process industry. This product has excellent broad chemical resistance, good mechanical properties, and outstanding hot-air aging properties. Kalrez® Spectrum™ 6375 is well suited for use in mixed process streams because of its excellent resistance to acids, bases, and amines. It is also recommended for use in hot water, steam, pure ethylene oxide and propylene oxide.
Kalrez
Kalrez® Spectrum™ 0040
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® Spectrum™ 0040 perfluoroelastomer parts are specifically designed for low temperature environments where significant chemical resistance is required. Low temperature sealing performance (-42°C) typically unattainable for perfluoroelastomers parts is achievable with Kalrez® Spectrum™ 0040. Kalrez® Spectrum™ 0040 is an excellent choice in applications such as couplings for the chemical transportation industry or for other applications where chemical resistance and elasticity are required in some of the coldest environments. The volume swell for Kalrez® Spectrum™ 0040 is approximately 10% when exposed to nitric acid at 110°C for 168 hours.
Kalrez
Kalrez® Spectrum™ 7075
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® perfluoroelastomer parts are the material of choice for mechanical seals, valves, flanges and other demanding chemical and hydrocarbon processing applications. Kalrez® Spectrum™ 7075 has enhanced physical properties including very low compression set and improved seal force retention. It is a carbon black-filled product utilizing proprietary cure chemistry. Its mechanical properties are designed for improved sealing performance in both high temperature environments and temperature cycling situations. Kalrez® Spectrum™ 7075 O-rings have a glossy finish. This product was specifically developed for the chemical and hydrocarbon industries to provide improved chemical and thermal resistance better than the industry standard set by Kalrez® 4079.
Kalrez
Kalrez® 8002
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® 8002 perfluoroelastomer parts are a clear product for ash/strip applications. This unfilled product offers excellent plasma-cracking resistance and ultra-low particle generation in oxygen and fluorine-based plasmas versus mineral-filled products. Kalrez® 8002 exhibits excellent resistance to dry process chemistry, has good mechanical strength and is well suited for static, low stress/low sealing force and select bonded door seal applications. A maximum application temperature of 275°C (527°F) is suggested. Ultrapure post cleaning and packaging is standard for all Kalrez® 8002 parts.
Kalrez
Kalrez® 9100
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® 9100 is an amber translucent product targeted specifically for PECVD, ALD, HDPCVD and Conductor (Poly/Metal) Etch applications*. Kalrez® 9100 has been specifically designed for low erosion and ultra-low particle generation in harsh plasma environments. It offers excellent thermal stability, very low outgassing as well as excellent elastic recovery and good mechanical strength properties and is well suited for both static and select dynamic sealing applications*. A maximum application temperature of 300°C (572°F) is suggested. Ultrapure post-cleaning and packaging is standard for allKalrez® 9100 parts.
Kalrez
Kalrez® 9300
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® 9300 perfluoroelastomer parts are a brown product for Dielectric (Oxide) Etch applications. It has been specifically designed for use in applications where the plasma environment is a combination of ions (physical) and radicals (chemical), i.e., where a balance of physical and chemical plasma erosion resistance is typically required.
Kalrez
Kalrez® 8085
Chemical Family: Fluoropolymers
Polymer Name: Perfluoroelastomer (FFKM)
Kalrez® 8085 perfluoroelastomer parts are a beige, general purpose product for select etch, ash/strip and deposition processes. It has been formulated for minimal particle generation in NF3 plasma. Kalrez® 8085 exhibits very low particle generation and low weight loss in oxygen and fluorine-based plasmas, has excellent mechanical strength and is well-suited for both static and dynamic sealing applications (e.g., bonded slit valve doors, bonded gate valves, bonded pendulum valves, gas orifice seals, gas feedthrough seals, chamber lid seals, etc.) A maximum continuous service temperature of 240 °C is suggested. Kalrez® 8085 can also withstand short-term excursions to 275 °C. Ultrapure post-cleaning and packaging is standard for all Kalrez® 8085 parts.
Brand Summary
Identification & Functionality
Applications & Uses
Brand Highlights
Kalrez® elastomers for specialty sealing are engineered to resist more than 1,800 chemicals while offering high temperature stability. Advantages of Kalrez® include:
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Resists over 1,800 different chemicals
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High temperature stability up to 327°C
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Maintains seal integrity
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Reduces maintenance and operating costs
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Long seal life
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Meets safety standards for pharmaceutical and food processing
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Available in standard and specialty compounds formulated for custom use
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Seals and o-rings in pumps, reactors and flange joints
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Valve stem packing systems
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High-performance parts for aerospace, oil and gas equipment, transportation, and chemical processing
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Life science applications
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Semiconductor processing
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Photovoltaic manufacturing seals
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Food contact materials
Kalrez® perfluoroelastomer (FFKM) parts withstand attack from over 1,800 chemicals, solvents and plasmas. While exhibiting excellent chemical compatibility, the Kalrez® product line delivers outstanding performance in aggressive process environments. Whether it’s resistance to acids, amines, plasma, ultrapure de-ionized water or strong bases, by selecting the Kalrez® product that is best suited to a specific application, manufacturers can improve seal performance in their operating environment. Kalrez® parts are available in a number of different compounds that are formulated to optimize properties and give the best possible performance in various chemicals and temperatures.
Fluoroelastomer O-ring (left) and Kalrez® O-ring (right). The Kalrez® O-ring exhibits less volume swell in trisolvent test
Chemical Resistance Chart
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Extending Lifetime of Critical Seals in HDPCVD Processes
As the semiconductor industry continues to invest in 300 mm wafer fabrication, the spotlight is on process improvement and the greater demands this technology makes on process equipment. In HDPCVD processes elastomer sealing materials can be a weak link because of the need for seal replacement during preventive maintenance (PM) procedures.
Kalrez® Parts in Natural Gas Sampling Systems and Delivery
Transporting natural gas from well to consumer is a delivery challenge faced by industrialized nations throughout the world. In the United States alone, well over 270,000 miles of above- and below-ground pipelines are dedicated to delivering gas to the millions of households and commercial businesses that rely on natural gas for heat and energy.
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.
Documents (84)
