Dupont Kalrez O-ring

We supply FFKM orings, Kalrez orings and Chemraz orings, FEP, PFA, Aflas, TTV, PEEK, PTFE, Viton, FPM, FKM, HNBR, NBR orings at competitive prices for our clients. Encapsulated o-rings are o-rings consisting of a seamless and uniform Teflon® FEP/PFA encapsulation/jacket which completely encloses a core material of either silicone or Viton® Elastomers. The combination of these components creates an o-ring that is virtually chemically inert and compression set resistant for use in harsh sealing environments.

About Dupont™

Dupont™ is a science company with a large portfolio of products, materials, and services that meet the needs of markets in over 90 countries. Dupont™ is a part of DowDuPont, with the core values of safety and health, environmental stewardship, highest ethical behavior and respect for people. 

Where is Dupont™ located?

Dupont™ is located globally, with locations scattered all across the world. 

What is DuPont™ Kalrez?

DuPont™ Kalrez is a perfluoroelastomer compound that provides reliable, long-term sealing in extreme chemical and thermal environments.

The use of DuPont™ Kalrez elastomers results in reduced maintenance costs thereby improving productivity and uptime of critical manufacturing processes.

DuPont™ Kalrez has nearly inert chemical resistance allowing it to perform in the harshest environments while having the reliable sealing capability of an O-ring.

DuPont™ Kalrez offers more stability, more resistance, more effective sealing

The use of DuPont™ Kalrez creates an increased level of safety and a reduction in fugitive emissions.

Compounds can be manufactured to resist degradation in harsh chemicals thereby improving process purity.

DuPont™ Kalrez will handle extreme temperatures exceeding standard fluorocarbon materials such as Viton while maintaining excellent chemical resistance.

Typical applications of DuPont™ Kalrez would include chemical processing, oil and gas, and pharmaceuticals where purity of the product is essential. This same purity goes into wafer processing in the semi-con world to improve sealing reliability in processes that use high heat, with aggressive chemicals and plasma.

All compounds are manufactured to the highest quality standards with full lot traceability and quality assurance under ISO 9001. Some additional characteristics are:

  • Superior chemical resistance to more than 1800 chemicals

  • Service temperature range up to 327°C

  • Maintains sealing force to keep seals tight

  • Low compression set

  • Field proven in electronic processes

  • Long seal life in chemical and hydrocarbon processing

  • FDA and USP compliance

How can you request this material?

Contact with  us !

material codedescription
DuPont™ Kalrez® Spectrum™ 6375It has the most extensive
chemical resistance
properties, it can be
used the environment of
many chemical mediators
coexistence, 260 ºC hot
water and steam is the
DuPont™ Kalrez® 4079It has excellent chemical
resistance, When used at high
temperature, it has excellent
compression and deformation
characteristic. But pay special
attention to the application
of amino compounds,
on the thermal cycle
circumstances,the temperature
should below 280 ºC
DuPont™ Kalrez® Spectrum™ 70757075 is a new product on the
basis of the 4079, compare
with 4079, 7075's compression
and deformation rate is smaller,
sealing ability is better, it
can be used in 327 ºC high
temperature environment.
DuPont™ Kalrez® Spectrum™ 6380
DuPont™ Kalrez® Spectrum™ 7090
DuPont™ Kalrez® 0090
DuPont™ Kalrez® Spectrum™ 0040
DuPont™ Kalrez® 1050LFIt is the most suitable
material of Amino
compound, hot water
and general chemical
chemicals resistance, heat
resistance is also very
DuPont™ Kalrez® 2035It suits the environment of
below 200 ºC hot water.
water vapor,and Amino
compound,It is the most
suitable material of the
Chemicals which include
Ethylene oxide, propylene
oxide ring structure.
DuPont™ Kalrez® 3108material, it is the most
suitable material of Styrene
monomer, butadiene and
other chemicals

Salient performance/Quality assurance:
1. Perfluoro (ether) rubber is invented by DuPont, DuPont is creator of it
2. Kalrez is the only product which the time of application is more than 30 years, it is proved a long-term reliable and secure product in a variety of harsh sealing conditions
3. Kalrez is the only product which from rubber to finished product all controled by DuPont,so ensures that the long-term stability of using of each product .
4. Traceability: Each individually wrapped, has a unique bar code, every single product can be traced back to any information 
5. High temperature, high pressure. The maximum temperature can reach 327 ºC heat resistance
6. Chemical property is stable, resistance to hydrogen sulfide, benzene, oil, strong acid and alkali, the kinds of chemical medium are more than 1600.
7. Excellent tensile strength (TS~15-20MPa)
8. Extremely low compression permanent deformation(~20%-70h  200ºC)
9. Excellent sustained sealing ability
The type of Kalrez O-RING:
Japanese Industrial Standard: JIS (P/G/V/S/NW)
American National Standards Institute: AS-568A
European standard : K

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