FFKM O-Rings

FFKM O-Rings (Simriz®)

As a universal sealing component, O-rings are used in nearly all applications and offer excellent value for money. Available in all elastomer materials, O-rings from Freudenberg Sealing Technologies are suitable for many applications in the food and beverage industry, making FST the perfect O-Ring supplier for your application. They are fully certified and meet all special requirements. High-temperature O-rings from Freudenberg Sealing Technologies are designed to provide exceptional performance in process industry applications, offering broad chemical compatibility, resistance to extreme temperatures, and durability under demanding operating conditions.

FFKM-SIMRIZ®

Simriz® is a range of O-rings in perfluoroelastomer (FFKM) compounds by Freudenberg Sealing Technologies, offering exceptional chemical compatibility and heat resistance. Designed for industries like chemical processing, oil and gas, aerospace, and semiconductors, it stands out with its broad chemical stability, like PTFE, combined with the rubbery-elastic qualities of an elastomer. Simriz® seals withstand extreme temperatures (up to 325°C) and harsh chemicals, making them ideal for demanding environments.

The FFKM Chemical Compatibility can be reviewed in our Chemical Resistance Guide.

FFKM O’Rings


Refer to our Simriz brochure for more information.


​​Simriz® is a premium range of perfluoroelastomer (FFKM) compounds developed by Freudenberg Sealing Technologies, offering exceptional chemical resistance, thermal stability, and elasticity. These seals are designed to meet the stringent demands of industries such as chemical processing, oil and gas, aerospace, semiconductors, and pharmaceuticals. Simriz® compounds exhibit chemical resistance comparable to PTFE (polytetrafluoroethylene), making them suitable for aggressive environments involving acids, bases, oxidizers, and solvents. 


Simriz® seals are widely used across multiple industries due to their robust performance. In chemical processing, they withstand harsh chemicals and extreme temperatures in reactors and pipelines. In the oil and gas sector, they perform reliably under high-pressure environments and resist rapid gas decompression (RGD). For semiconductors, high-purity compounds like Simriz® 489 ensure compatibility in plasma applications. In pharmaceuticals, they provide purity and compliance for drug manufacturing processes. Additionally, in aerospace, they ensure durability in high-temperature and chemically aggressive conditions.


Freudenberg's vertical integration allows them to manufacture Simriz® seals from monomers to finished products, ensuring cost efficiency and quality control. This integration also enables them to offer quick tooling for custom sizes within weeks, catering to unique customer requirements. Overall, Simriz® seals represent a cutting-edge solution for demanding environments where conventional elastomers fail, combining chemical resistance, thermal stability, and elasticity to meet critical application needs.

 
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Product Code
Description
Availability
Qty
SIMRIZ 495 FFK 317 OR 23.16x5.33mm ORING 75DURO
0
SIMRIZ 495 FFK 32.92 X 3.53mm ORING FFKM 75DURO
0
SIMRIZ 495 FFK 222 OR 37.69x3.53mm ORING 75DURO
0
FFKMM-0140025 75 SIMRIZ 494 14.00 x 2.50mm ORING FFKM 75DURO
0
SIMRIZ 485 75 17.17 x 1.778mm ORING 75DURO
0
SIMRIZ 495 FFK 7.59 X 2.62mm ORING 75DURO
0
O-Ring 80 SIMRIZ 498 BLACK 234.54 X 3.53mm AS568-271 BS271 SIMRIZ 9.234 X 0.139"
0
O-Ring 75 SIMRIZ 485 BLACK AS568-007 BS007 SIMRIZ 0.145 X 0.070"
0
O-Ring 75 SIMRIZ 485 BLACK 5.28 X 1.78mm AS568-009 BS009 SIMRIZ 0.208 X 0.070"
0
O-Ring 75 SIMRIZ 485 BLACK 6.07 X 1.78mm AS568-010 BS010 SIMRIZ 0.239 X 0.070"
0
ORING FFKM BS004 KALREZ 0.070 x 0.070" RKA004
0
ORING FFKM BS007 KALREZ 0.145 x 0.070" RKA007
0
ORING FFKM BS009 KALREZ 0.208 x 0.070" RKA009
0
ORING FFKM BS108 KALREZ 0.237 x 0.103" RKA108
0
ORING FFKM BS010 KALREZ-4079 0.239 x 0.070" RKA010
0
ORING FFKM BS011 KALREZ-6375 0.301 x 0.070" RKA011
0
ORING FFKM BS110 KALREZ 0.362 x 0.103" RKA110
0
ORING FFKM BS012 KALREZ 0.364 x 0.070" RKA012
0
ORING FFKM BS309 KALREZ-4079 0.412 x 0.210"
0
ORING FFKM BS206 KALREZ 0.484 x 0.139" RKA206
0
ORING FFKM BS014 KALREZ 0.489 x 0.070" RKA014
0
ORING FFKM BS113 KALREZ 0.549 x 0.103" RKA113
0
ORING FFKM BS017 KALREZ 0.676 x 0.070" RKA017
0
ORING FFKM BS210 KALREZ 0.734 x 0.139" RKA210
0
 
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