Kalrez® SpectrumTM - The Latest Products for CPI

Engineers in the chemical process and oil and gas industries looking for a 90 durometer, low compression set sealing elastomer to help withstand rapid gas decompression and aggressive solvents at high temperature can now consider specifying Kalrez® Spectrum^TM 7090 perfluoroelastomer parts.

Kalrez® Spectrum^TM 7090 - the latest addition to the Kalrez® Spectrum^TM family of products - is targeted for static and dynamic sealing in applications requiring high hardness, higher modulus, and extrusion resistance at continuous service temperatures as high as 325°C.

• outstanding compression set resistance and seal force retention,
• excellent response to temperature cycling effects,
• high resistance to rapid gas decompression,
• outstanding thermal stability and chemical resistance,
• lower coefficient of thermal expansion than other Kalrez® parts - minimizing need to increase free volume of seal gland when upgrading from FKM to FFKM.

• A major compressor OEM in the chemical process industry required an O-ring material to withstand CO₂, H₂S, methane, toluene, xylene and various hydrocarbons in process temperatures up to 210°C.

Since TPE/propylene and FKMs were found to be unsuitable in this aggressive chemical and temperature environment, the company decided to specify Kalrez® Spectrum^TM 7090 parts. These were installed over 6 months ago for long-term service, and are reported to be meeting all sealing requirements even in these harsh conditions.

• A major ball valve producer in the oil and gas industry installed Kalrez® Spectrum^TM 7090 Orings for service in methanol, CO₂ and H₂S process chemistry at around 150°C.

At time of publication, the Kalrez® O-rings had been in continuous operation for over 8 months without any issues and are considered to be in the early phase of their service lifetime.

Figure 1. Long-Term Compression Set in 300°C Hot Air for Kalrez® 7090