O-rings FFKM (evolast®)
FFKM O-rings (also known as Kalrez) are chemically and thermally the most taxable elastomers. With some FFKM types, temperatures above 300°C are achievable. Resistance to chemicals is almost universal and comparable to that of PTFE.
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O-rings FFKM (evolast®)
The compound FFKM is suitable to serve as a seal in a variety of forms, but as an O-ring FFKM is most commonly used. FFKM is marketed by market leader DuPont as the Kalrez brand. Our equivalent to Kalrez is Evolast brand FFKM. FFKM materials are chemically and thermally the most load-bearing elastomers. With some FFKM types, temperatures just over 300°C are manageable. Resistance to chemicals is nearly universal and comparable to that of PTFE. The advantage of FFKM lies in the combination of the chemical and thermal resistance of PTFE with the elastic properties of elastomeric materials.
These special elastomers are used wherever their high price is justified by corresponding safety requirements or high maintenance costs and too much is demanded of standard elastomers. The proven long-term results of FFKM O-rings leads in many cases to longer service lives and fewer seal repairs/replacements. This reduces downtime, allowing machines or other applications to be used more effectively.
The O-rings made from Evolast® FFKM can range from very small to very large sizes. Currently, there are approximately 10,000 different sizes available.
Standard Compounds:
Evolast N894 (equivalent of Kalrez 6375)
Evolast N896 (equivalent of Kalrez 4079)
FFKM resists well:
Nearly all chemicals
Ozone, weather conditions, aging
FFKM does not resist:
Fluorinated compounds
Applications FFKM O-rings:
Chemical industry
Medical industry
Food industry
Oil and gas industry
Many other applications where a lot of the seal is required
Use temperature range:
-15°C to +270°C
with special grades, -40°C resp. +340°C is achievable
To learn more about FFKM O-rings from Evolast:
If you have any questions or would like advice on our FFKM O-rings, please feel free to contact us at 038 - 30 32 700 or email us at sales@sealsupply.nl.
The online wholesaler for all your FFKM O-rings
FFKM O-rings are easy to order online, by phone or by email from Seal Supply. With your own webshop account you benefit from the convenience of finding the right seals quickly, including through our handy search function 'smartsearch'. Here you have 24/7 insight into available stock, delivery times and your prices and you can place orders with us at any time. If you do not yet have a webshop account, click here to request your own account with us.
Overview of FFKM compounds
Material | Compound | Hardness | Color | Temperature | Temperature | Equivalent of | Description |
|
| shore |
| min. °C | max. °C |
|
|
evolast® B694 | 2160-10301 | 60 (A) | white | -20 | 270 |
| FDA |
USP Class VI | |||||||
3A Sanitary Standard | |||||||
chemical resistance | |||||||
evolast® B794 | 2170-10303 | 70 (A) | white | -20 | 270 | Kalrez® 6880 | FDA 21 CFR 177.2400 |
Kalrez® 6221 | USP Class VI | ||||||
Perlast® G74S | 3A-Sanitary Standard | ||||||
| chemical resistance | ||||||
evolast® B795 | 2170-10301 | 70 (A) | white | -15 | 300 | Perlast® G70H | high temperature |
FDA | |||||||
USP Class VI | |||||||
3A-Sanitary Standard | |||||||
chemical resistance | |||||||
evolast® B7LT | 2170-10304 | 70 (A) | white | -40 | 250 | Simriz® 483 | excellent low temperature |
Chemraz®514 | conform FDA | ||||||
| USP Class VI | ||||||
| 3A-Sanitary Standard | ||||||
| chemical resistance | ||||||
evolast® B7SC | 2175-10308 | 75 (A) | white | -20 | 300 | Kalrez® 8575 | high temperature |
high purity | |||||||
high purity | plasma applications | ||||||
chemical resistance | |||||||
evolast® B894 | 2180-10304 | 80 (A) | white | -20 | 270 | Chemraz® SD 517 | standard applications |
Chemraz® 513-514 | chemical resistance | ||||||
| Conform FDA | ||||||
evolast® B895 | 2180-10303 | 80 (A) | white | -15 | 300 | (G75 S) | high temperature |
Perlast® G80H | chemical resistance | ||||||
| Conform FDA | ||||||
evolast® N694 | 2160-10302 | 60 (A) | black | -25 | 270 |
| standard applications |
chemical resistance | |||||||
evolast® N794 | 2170-10302 | 70 (A) | black | -25 | 270 | Simriz® 491 | FDA 21 CFR 177.2400 |
Kalrez® 6230 | USP Class VI | ||||||
| 3A-Sanitary Standard | ||||||
| chemical resistance | ||||||
evolast® N7FD | 2175-10305 | 75 (A) | black | -20 | 270 |
| FDA 21 CFR 177.2400 |
| USP Class VI | ||||||
| 3A-Sanitary Standard | ||||||
| chemical resistance | ||||||
| is being phased out | ||||||
| N794 is the successor | ||||||
Kalrez® 6230 |
| ||||||
Chemraz® SD625 |
| ||||||
evolast® N7LT | 2175-10301 | 75 (A) | black | -40 | 250 | Kalrez® 0040 | excellent low temperature |
Chemraz® 505 | chemical resistance | ||||||
evolast® N775 | 2175-10309 | 75 (A) | black | -15 | 340 | Spectrum® 7075 | high temperature |
Triazinico | outstanding thermal stability | ||||||
| not suitable for steam/amine | ||||||
| chemical resistance | ||||||
evolast® N894 | 2175-10307 | 75 (A) | black | -25 | 270 | Kalrez® 6375 | standard applications |
Chemraz® 605 | chemical resistance | ||||||
Perlast® G80A |
| ||||||
Isolast® 9440 |
| ||||||
Simriz® 495 |
| ||||||
Parafluor® V8910-75 |
| ||||||
evolast® N896 | 2175-10303 | 75 (A) | black | -15 | 330 | Kalrez® 4079 | high temperature |
Isolast® J8325 | chemical resistance | ||||||
Isolast® J9876 |
| ||||||
Chemraz® 615 |
| ||||||
Perlast® G75B |
| ||||||
Chemraz® 551 |
| ||||||
evolast® N897 | 2175-10306 | 80 (A) | black | -30 | 260 | Isolast® J9503 | low temperature |
Simriz® 481 | chemical resistance | ||||||
evolast® N8FD | 2175-10310 | 75 (A) | black | -15 | 315 |
| high temperature |
FDA | |||||||
USP Class VI | |||||||
3A-Sanitary Standard | |||||||
chemical resistance | |||||||
| |||||||
evolast® N8LT | 2175-10311 | 75 (A) | black | -40 | 260 |
| excellent low temperature |
chemical resistance | |||||||
evolast® N8SR | 2175-10304 | 75 (A) | black | -15 | 330 | Kalrez® 1050LF | steam |
hot water | |||||||
chemical resistance | |||||||
evolast® N993 | 2190-10302 | 90 (A) | black | -20 | 270 |
| standard applications |
chemical resistance | |||||||
evolast® N995 | 2190-10304 | 90 (A) | black | -15 | 330 |
| high temperature |
chemical resistance | |||||||
evolast® N9ED | 2190-10305 | 90 (A) | black | -15 | +260 (+280) | Chemraz® 526 | anti explosive decompression AED |
Isolast® J9510 | NORSOK M710 | ||||||
Perlast® G90D | chemical resistance | ||||||
evolast® N9EX | 2190-10301 | 90 (A) | black | -15 | +320(+340) | Kalrez® 7090 | anti explosive decompression AED |
NORSOK M710 | |||||||
high temperature | |||||||
chemical resistance | |||||||
evolast® N9LT | 2190-10306 | 90 (A) | black | -40 | +250(+270) |
| anti explosive decompression AED |
NORSOK M710 | |||||||
excellent low temperature | |||||||
chemical resistance | |||||||
evolast® V7FD | 2170-10307 | 70 (A) | green | -15 | 270 |
| standard applications |
FDA | |||||||
USP Class VI | |||||||
3A-Sanitary Standard | |||||||
chemical resistance | |||||||
| |||||||
evolast® V895 | 2180-10305 | 80 (A) | green | -15 | 310 |
| high temperature |
chemical resistance | |||||||
evolast® B8HC | 2180-10307 | 80 (A) | white | -20 | 260 | Kalrez® 6380 | excellent for hot water / steam / amine |
evolast® N994 | 2190-10303 | 90 (A) | black | -30 | 260 | Chemraz® 510 | suitable for low temperature |
Kalrez® 3018 | chemical resistance | ||||||
Chemraz® 600 |
| ||||||
evolast® N7HC | 2175-10312 | 75 (A) | black | -20 | 260 |
| superior service life in hot water, steam and amines |
excellent chemical resistance | |||||||
low compression set |