What is Kalrez rubber?
What is Kalrez rubber?
DuPont™ Kalrez® 4079 perfluoroelastomer parts are a low compression set product for general purpose use in O-rings, diaphragms, seals and other parts used in the chemical process and aircraft industries. Kalrez®4079AMS has good mechanical properties and is well suited for both static and dynamic sealing applications.
Is Kalrez a PTFE?
In addition, Kalrez® is a thermoset perfluoroelastomer part and offers excellent elastic properties and resistance to mechanical damage, unlike PTFE which is a thermoplastic and appears to lack the necessary resilience to withstand mechanical shock in a process application such as this.
What is Kalrez made of?
Because Kalrez® parts maintain their sealing integrity, you reduce your risk of environmental non-conformance. Kalrez® parts are made only by DuPont, a fully integrated manufacturer of Vespel® parts and shapes, Viton® fluoro elastomers and Neoprene rubber polymers, as well as perfluoroelastomer parts.
Is FFKM the same as Kalrez?
Perfluoroelastomers (FFKM) are best known as DuPontTM Kalrez, although other grades do exist. The compounds contain fully fluorinated polymer chains and hence offer the ultimate performance of elastomers when considering heat and chemical resistance.
Why is Kalrez so expensive?
The name Kalrez® is a trademark of Dupont. The material is actually an improved version of Viton with 20% more fluorine in the chains, making it an extremely expensive per fluorocarbon elastomer.
When was Kalrez invented?
Stone said these materials were developed late in the 1960s, then in the early 1970s the firm released its Kalrez-branded sealing products to the market.
What is Chemraz?
Chemraz® is a polymer of three or more monomers in which all hydrogen positions have been replaced with fluorine. It has the broadest chemical resistance of any elastomeric material.
Why is kalrez so expensive?
Is FFKM FDA approved?
This compound meet the FDA requirements according to CFR 177.2600 in regard to global migration. Low temperature flexibility. FFKM 75 ± 5 Shore A black, upper chemical resistance grade. Developed for food and pharmaceutical processing, automated CIP and SIP systems and is FDA compliant to 21 CFR 177.2600.
How expensive is kalrez?
With DuPont Kalrez: Kalrez® Spectrum™ 6375 perfluoroelastomer O-rings extended the lifetime to an average of two months….Total System Cost – Example 1.
| Non-FFKM | Kalrez | |
|---|---|---|
| Initial cost (seals and installation) | $87,800 | $155,000 |
| Replacement seal cost | $17,560 | $12,400 |
| Downtime cost | $120,000 | $48,000 |
Why is Ffkm so expensive?
Which is better Kalrez 4079 or 6375 O rings?
Kalrez 6375 O-rings are preferred over Kalrez 4079 for chemical-processing environments and applications involving steam. They resist acetone, methyl ethyl ketone (MEK), potassium hydroxide, and most acids. All have a round profile and are suitable for a wide range of static and dynamic sealing applications.
How is Kalrez 7075 used in the chemical industry?
Kalrez ® 6375 compounds are widely used in the chemical process industry, as they have excellent broad chemical resistance and mechanical properties. Kalrez ® 7075 can perform in high temperature O-Ring environments up to 620 ºF (325ºC).
What kind of compression set is Kalrez for?
A low compression set product for general-purpose use in O-rings, diaphragms, seals, and other parts used in the process and aircraft industries. It is a carbon black-filled product with excellent chemical resistance, good mechanical properties, and outstanding hot air aging properties.
How are Kalrez O rings used in sealing devices?
Kalrez® Spectrum 4079, Kalrez® Spectrum 6375 and Kalrez® Spectrum 7075 O-rings and custom parts reduce downtime by extending mean time between replacements, and are used in applications including pumps, valves, reactors, flange joints and extreme chemical sealing applications. Kalrez® O-rings have proven performance around the world.
