Kalrez
- June 09, 2026
No Leakage in 10 Years with Kalrez Perfluoroelastomer Seals
Dramatic increases in instrument performance and reliability have been achieved where original PTFE gasket seals have been replaced with Kalrez® custom gaskets from the Qnity™ Performance Polymers range of products.
A Finnish manufacturer of process refractometers was utilizing process media at temperatures ranging from -20° to +220°C and pressures from 0.7 bar to 25 bar. These aggressive operating conditions resulted with the PTFE seals needing to be regularly replaced on a 6-12 months operating cycle.
However, after the seals were replaced by Kalrez® custom gaskets, there was no experience of fluid leakage over a 10 year period, even though the sealing products were subject to permanent in-line fluids immersion during this period.
- April 07, 2026
Kalrez® Spectrum™ 7275 Double 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
- December 23, 2025
Kalrez® Bonded Door Seals
Bonded door seals for gate valves and slit valve door seal applications provide improved sealing performance versus conventional O-rings by reducing particle generation, extending seal life, and minimizing replacement time during preventive maintenance.
DuPont™ Kalrez® bonded door seals are designed for easy installation and low particle generation. They combine a custom seal design and proprietary
- March 04, 2025
DuPont™ Kalrez® 0090 Perfluoroelastomer Parts For Ball Valves in Refineries
Ball valves are primarily used for shut-off applications in the energy industry and must function in a wide range of chemical environments, both gas and liquid, where significant performance differences are often observed between various types of sealing materials.
Kalrez® 0090 O-rings are TOTAL and NORSOK compliant with exceptional chemical resistance and Rapid Gas Decompression performance making them an excellent
- February 14, 2025
Kalrez® Parts Extend Service Life for Process Instrument
Aggressive environment was challenging for PTFE
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
- December 13, 2024
Video - DuPont™ Kalrez® Thermal Stability and Critical Performance Properties
In this video, Gallagher explores Kalrez and its longstanding thermal stability characteristics along with selected critical performance properties, such as permeation rates, outgassing rates, radiation resistance, and hardness/ temperature relationships.
The full agenda can be seen below.
- October 08, 2024
Video - DuPont™ Kalrez® Chemical Resistance | Capabilities & Limits | Test Methods | Successful Case Studies
With Kalrez, you can help ensure your plant against leaks and costly seal failures with Kalrez perfluoroelastomer parts. In virtually any sealing application, from mechanical seals, to quick disconnects, Kalrez parts stand up to heat and chemicals that degrade other rubbers and sealing materials.
Kalrez combines the superior characteristics and properties
- July 17, 2024
DuPont™ Kalrez® and its Robust Chemical Resistance - Amines, Aldehydes, Ethers, Esters, Acids, and Bases
Kalrez® is a result of Viton™ and Teflon™ research. Kalrez is a cross-linked fully fluorinated polymer. Kalrez combines the rubber properties of Viton™ with the chemical resistance of Teflon™…. plus super high temperature resistance, about 200 degrees Fahrenheit GREATER than Viton or Teflon™.
In the molecular
