Chemical Processing Seals For Reliable Performance
Kalrez® seals provide exceptional service in high-heat, aggressive-chemical processing environments.
DuPont™ Kalrez® chemical processing seals are a high-performance, cost-effective choice for demanding manufacturing uses. They provide broad chemical resistance and stability up to 327°C, with a range of grades to match specific applications.
A New Standard of Resistance
Kalrez® 4079 set the standard for high-temperature, chemically resistant seals with its introduction in the 1980s. It rapidly found its way into aerospace, chemical processing and oil and gas applications. Since its introduction, many additional products have been added to the Kalrez® portfolio, to help meet unique application requirements.
Kalrez® Spectrum™ 6375 seals have been an excellent choice for use with acids, bases, amines, steam, ethylene oxide, and many other aggressive chemicals. Mixed streams, once a problem for many chemical processors, are now applying Kalrez® Spectrum™ 6375 parts.
For higher temperature environments, Kalrez® Spectrum™ 7075 seals can withstand temperatures up to 327°C. Kalrez® Spectrum™ 7275, the latest innovative FFKM from DuPont, provides long life sealing in an array of aggressive chemical environments that are known to be difficult for sealing, including ethylene oxide, acrylic monomers, silanes & chlorosilanes and strong oxidizers such as nitric acid, chlorine and chlorine dioxide, at temperatures up to 300°C.
Kalrez® parts are available in various compounds to meet individual application requirements. Contact DuPont if you require assistance in selecting the appropriate product.
More Efficient Production
Kalrez® chemical processing seals can reduce downtime and extend the mean time between replacements. Some examples of their uses include couplings, pumps, valves, reactors and flange joints. Kalrez® seals have proven performance in mechanical seal applications around the world. Whether you choose O-rings or a customized shape, Kalrez® is a high-value, cost-saving part that you can put to work in your applications.
DuPont application engineers collaborate with end-users to help users specify products that help meet their application requirements, whether it’s aggressive amines, solvents, high temperatures, or seals designed for specialty applications. Kalrez® seals are used in a range of industries, including:
- Chemical production and transport
- Petroleum refining
- Agricultural chemicals manufacturing
- Painting and coating operations
- Analytical and process control instrumentation
Safety and Compliance Support
Kalrez® seals can help reduce leaks and fugitive emissions, for improved compliance with environmental regulations. Because Kalrez® seals used in chemical processing maintain their sealing integrity within a broad range, they can help maintain operations and lower overall production costs.
Kalrez® perfluoroelastomer parts
Kalrez® perfluoroelastomer parts (FFKM) resist over 1,800 different chemicals and withstand temperatures up to 327ºC. This elastomer is widely used in demanding chemical processing and semiconductor manufacturing, as well as pharmaceutical, aerospace and oil & gas applications.
INFORMATION & IDEAS
- Elastomer Chemical Resistance Guide
- High Performance Polymers
Chemical Resistant Elastomers
DuPont has a portfolio of chemical resistant elastomers and thermoplastics to match a broad spectrum of challenges – from aggressive automotive fuels to custom industrial equipment.
Seal Outgassing Test Results
Evaluation and comparison of outgassing for three different classes of elastomeric seal materials used in semiconductor process environments using DuPont test methodology.