Kalrez O rings are special type of O rings that are designed and manufactured for the use in highly corrosive and demanding operating conditions where the temperature are higher than 300 degree Celsius and O ring is exposed to extreme chemical conditions. The word “Kalrez” is a brand name given by DuPont and the material that is used by these O rings is FFKM also called as Perfluoroelastomer (synthetic rubber).

“Kalrez” O rings are the patented products of DuPont and are used in environment which involves high temperatures, solvents, plasmas. These types of O rings can withstand chemical reactions from more than 1800 chemicals. Some of the properties of Kalrez includes:

• High resistance to chemicals.
• Able to withstand temperatures ranging up to 327 degrees Celsius.
• Shows similar elasticity as FKM made O rings show.
• These Kalrez O rings are highly reliable and have long working life.

There are variety of Kalrez O rings available in the market that are used for various applications.

• Kalrez 7075 (Black colored, temperature range is -20°C to +327°C)
• Kalrez 4079 (Black colored, temperature range is -20°C to +316°C)
• Kalrez 6375 (Black colored, temperature range is -20°C to +275°C)
• Kalrez 0040 (Black colored, temperature range is -42°C to +220°C)
• Kalrez 0090 (Black colored, temperature range is -21°C to +250°C)
• Kalrez 1050LF (Black colored, temperature range is -20°C to +288°C)
• Kalrez 2085 (Black colored, temperature range is upto 210°C)
• Kalrez 3065 (Black colored, temperature range is -23°C to +288°C)
• Kalrez 4001 (Black colored, temperature range is upto 275°C)
• Kalrez 6230/6221 (Black colored, temperature range is upto 260°C)
• Kalrez 6380 (Cream colored, temperature range is upto 225°C)
• Kalrez 7090 (Black colored, temperature range is upto 325°C)
• Kalrez 9100 (Amber clear colored, temperature range is upto 300°C)
• Kalrez 9300 (Brown colored, temperature range is upto 300°C)
• Kalrez 9500 (Tan colored, temperature range is upto 310°C)