The main advantage of FFKM(Kalrez) is that it has both the elasticity and sealing properties of an elastomer and the chemical resistance and thermal stability of ptfe.  FFKM(Kalrez) produces small amounts of gas in vacuum and exhibits high resistance to a variety of chemicals such as ethers, ketones, amines, oxidants, and many other chemicals.  FFKM(Kalrez) retains rubber properties even when exposed to corrosive fluids at high temperatures.  Therefore, FFKM(Kalrez) is widely used in semiconductor manufacturing, chemical transportation, nuclear industry, aircraft and energy and other industrial fields.  

Chinese perfluoroether products, temperature resistance +230℃, preferential price

* Note: Kalrez is the brand name of perfluorinated elastomers owned by DuPont.  

Kalrez part perfluorinated rubber properties overview:

Kalrez4079 Perfluoroether rubber seal ring  

Properties: excellent chemical resistance, excellent compression and deformation properties when used at high temperature.  But special attention is paid to the use of amine compounds.  The temperature should be below 280 degrees when used under thermal cycling.  

Heat resistance standard: 316℃  

Hardness (Shore A) : 75  

Kalrez7075 perfluoroether rubber seal ring  

Performance: Compared with 4079, the compression permanent deformation rate is smaller, the sealing ability is better and the high temperature resistance is better, can work in 327 degrees high temperature environment.  

Heat resistance standard: 327℃  

Hardness (Shore A) : 75  

Kalrez7075 Perfluoroether rubber seal Kalrez 6380  

Kalrez6380 perfluoroether rubber sealing ring  

Properties: milky white product, excellent broad – spectrum chemical resistance.  

Heat resistance standard: 225 degrees  

Hardness (Shore A) : 80  

Performance: Compared with 4079, the compression permanent deformation rate is smaller, the sealing ability is better and the high temperature resistance is better, can work in 327 degrees high temperature environment.  

Heat resistance standard: 327℃  

Hardness (Shore A) : 75  

Kalrez 7090   

Kalrez7090 perfluoroether rubber sealing ring   

Performance: high hardness, small compression permanent deformation rate, high heat resistant material.   

Heat resistance standard: 325℃   

Hardness (Shore A) : 90 

Kalrez 1050LF  

Kalrez1050LF perfluoroether rubber sealing ring  

Properties: Suitable for the material of amine compounds.  General chemical resistance is also excellent heat resistance.  

Heat resistance standard: 288℃  

Hardness (Shore A) : 82  

Kalrez 6375  

Kalrez6375 perfluoroether rubber sealing ring  

Performance: have a broad spectrum of chemical resistance, suitable for the coexistence of multiple chemical media environment, heat resistant water and steam.  

Hardness (Shore A) : 75  

Heat resistance standard: 275℃ 

Kalrez 7375  

Kalrez7375 perfluoroether rubber sealing ring  

Performance: have a broad spectrum of chemical resistance, suitable for the coexistence of multiple chemical media environment, heat resistant water and steam.  

Hardness (Shore A) : 75  

Heat resistance standard: 275℃