DuPont™ Kalrez® Parts for the Chemical Process Industry (CPI)
Recognized as the leading supplier of perfluoroelastomer (FFKM) parts for over 40 years, DuPont™ offers a variety of high performing Kalrez® seals that stand up to the most aggressive CPI environments.
Kalrez® CPI Product Selection Guide
Recognized as the leading supplier of perfluoroelastomer (FFKM) parts for over 40 years, DuPont™ offers a variety of high performing Kalrez® seals that stand up to the most aggressive CPI environments.
| Chemical Environment | 6375 | 4079 | 7075 | 7090 | 7275 | 6380 | 0040 | 0090 |
|---|---|---|---|---|---|---|---|---|
| General Purpose - Broadest Chemical Resistance | High Temperature - High Mechanical Strength | Highest Temperature Resistance - Lowest Compression Set | High Temperature, - High Hardness | Specialty - Oxidizing & Reactive Chemical Environments | Specialty - Strong Amines | Specialty - Low Temperature | Rapid Gas Decompression (RGD) Resistance |
|
| Acids | X | XX | XX | XX | X | X | XX | X |
| Inorganic Bases | XX | X | X | X | X | XX | X | XX |
| Hydrocarbons | XX | XX | XX | XX | X | X | XX | XX |
| Solvents | XX | XX | XX | XX | X | X | X | |
| Hot Water/Steam | XX | --- | --- | --- | X | X | --- | XX |
| Amines (Organic Bases) | X | --- | --- | --- | X | XX | --- | XX |
| Vinyl or Acrylic Monomers | X | --- | --- | X | XX | X | --- | X |
| Silanes and Chlorosilanes | X | X | X | X | XX | --- | --- | --- |
| Synthetic Oils | X | XX | XX | XX | X | --- | X | X |
| Strong Oxidizers (e.g., Nitric Acid, O 3 , ClO 2 ) | --- | --- | --- | --- | XX | X | --- | --- |
| Aldehydes | X | --- | --- | --- | XX | X | --- | --- |
| Streams of Unkown Composition | XX | --- | --- | --- | X | XX | X | X |
| Ethylene or Propylene Oxide (Pure) | X | --- | --- | --- | XX | XX | --- | XX |
| Dry Heat | X | XX | XX | XX | X | --- | --- | X |
| High Pressure / Extrusion Resistance | --- | --- | --- | XX | --- | --- | --- | XX |
| RGD (Rapid Gas Decompression Resistance | --- | --- | --- | X | --- | --- | --- | XX |
| Maximum Service Temperature1, °C (°F) | 275 (527) | 316 (600) | 327 (620) | 325 (617) | 300 (572) | 225 (437) | 220 (428) | 250 (482) |
| Lowest Service Temperature1, °C (°F) | -20 (-4) | -19 (-2.2) | -18 (-0.4) | -26 (-14.8) | -20 (-4) | -22 (-7.6) | -42 (-43.6) | -21 (-5.8) |
| Color | Black | Black | Black | Black | Light Brown | Cream | Black | Black |
| Durometer, Shore A2 | 75 | 75 | 75 | 90 | 75 | 80 | 70 | 95 |
| Elongation at Break3, % | 160 | 150 | 160 | 75 | 160 | 160 | 180 | 80 |
| Compression Set4, % (70 hours at 204°C/400°F) | 25 | 25 | 12 | 12 | N/A | 38 | 38 | 19 |
| Compression Set5, % (70 hours at 204°C/400°F) | 30 | 30 | 15 | 12 | 22 | 40 | 41 | 33 |
| Tensile Strength at Break6, MPa (psi) | 15.16 (2198) | 16.88 (2448) | 17.91 (2598) | 22.75 (3300) | 14.50 (2103) | 15.86 (2300) | 8.96 (1300) | 19.49 (2827) |
XX Best
X Suitable
– – – Not suggested
1 DuPont proprietary method; performance will vary with seal design and application specifics
2 ASTM D2240, (Pellet test specimens)
3 ASTM D412, (AS568 K214 O-ring test specimens)
4 ASTM D395B, (Pellet test specimens)
5 ASTM D395B, (AS568 K214 O-ring test specimen)
6 ASTM D412, 500mm/min (Dumbbell test specimens)
N/A = Test Data Not Available
Kalrez® CPI Product Overviews
General Purpose
Kalrez® 6375
Designed specifically for the chemical process industry, Kalrez® 6375 parts are designed to deliver outstanding performance in the widest possible range of chemicals and temperatures.
Properties & features:
- An excellent choice for use in aggressive chemicals such as:
- Acids
- Bases
- Amines
- Steam
- Ethylene oxide
- Curing system allows for a maximum service temperature of 275°C (527°F)
- High temperature stability translates to increased chemical resistance over all temperature ranges, especially if high temperature process excursions occur
Kalrez® 4079
Low compression set product for general purpose use in O-rings, diaphragms, seals and other parts used in the chemical process industry
Properties & features:
- Carbon black filled product with:
- Excellent chemical resistance
- Good mechanical properties
- Outstanding hot air aging properties
- Exhibits low swell in organic acids, inorganic acids and aldehydes
- Good response to temperature cycling effects
- Recommended maximum service temperature of 316°C (600°F); short excursions to higher temperatures possible
- Not recommended for use in hot water/steam applications or in contact with certain hot aliphatic amines, ethylene oxide, or propylene oxide
Kalrez® 7075
Specifically developed for the chemical and hydrocarbon processing industries. Kalrez® 7075 is designed for improved sealing performance in both high temperature environments and temperature cycling situations.
Properties & features:
- Carbon black filled product w/ very low compression set and improved seal force retention
- Provides even greater sealing performance in dynamic applications where low friction is required
- Improved thermal resistance that extends maximum service temperature to 327°C (620°F)
- Offers enhanced elastomeric properties while providing chemical resistance better than the industry standard, set by Kalrez® 4079
Specialty Products
Kalrez® Spectrum™ 7090
Specifically targeted for use in applications requiring high hardness/higher modulus properties
Properties & features:
- Excellent mechanical properties including:
- RGD resistance
- Seal force retention
- Compression set resistance
- Response to temperature cycling effects
- Suited for both static and dynamic sealing applications, especially those that require extrusion resistance at higher temperatures
- Outstanding chemical resistance and thermal stability
- Suggested maximum application temperature: 325 °C (617 °F). Short excursions to higher temperatures may be possible.
Kalrez® 7275
Light brown product based on a proprietary crosslinking system targeted specifically for the chemical processing industry
Properties & features:
- Exhibits minimal swelling and improved retention of physical properties when exposed to aggressive chemicals, such as:
- Concentrated nitric acid
- Organosilanes
- Chlorosiloxanes
- Pure ethylene oxide
- Butyraldehyde
- Amines
- Vinyl and acrylic monomers
- Excellent compression set resistance and good retention of physical properties after aging at high temperatures.
- Suggested maximum service temperature of 300°C
Kalrez® 6380
Specifically developed for chemical processes involving hot, aggressive amines and excellent overall chemical resistance. A top choice for both static and dynamic sealing applications.
Properties & features:
- Cream color is easily identifiable when selecting an O-ring material for harsh chemical plant services
- Excellent mechanical properties
- Maximum service temperature of 225°C (437°F) is suggested; short-term excursions to higher temperatures permissible
Kalrez® Spectrum™ 0040
Low temperature sealing performance (-42°C) typically unattainable for perfluoroelastomers parts is achievable with Kalrez® Spectrum™ 0040.
Properties & features:
- Excellent choice in applications such as couplings for the chemical transportation industry or other applications where chemical resistance and elasticity are required in some of the coldest environments
- Volume swell is approximately 10% when exposed to nitric acid at 110°C for 168 hours
- Compression set resistance is similar to Spectrum™ 6375, Kalrez’s broad chemically-resistant product
Kalrez® 0090
Durable, reliable sealing in applications that require RGD properties combined with high hardness and high modulus
Application areas include:
- Downhole equipment (such as drilling and completion tools)
- Industrial equipment (including pumps and valves)
Properties & features:
- Certified by two independent labs to meet rigorous requirements for resistance to RGD
- Chemical resistance:
- Kalrez® parts withstand attack by more than 1800 chemical substances
- NORSOK M-710 Rev 2 Sour Fluid aging resistance certification provided by MERL (UK)
- Broad temperature capability & outstanding RGD resistance: Retains high levels of resilience up to temperatures as high as 250°C (482°F) and down to –21°C (–5.8°F). Under pressurized sealing conditions, Kalrez® 0900 has demonstrated low temperature performance down to –40 °C (–40 °F) in customer laboratory tests.
C&B Equipment Is a Licensed Kalrez® Distributor
C&B Equipment is proud to be a Licensed Distributor of Kalrez parts®. The superior performance of these seals helps you increase your uptime—the mission that guides everything we do. Contact us today for your standard or custom Kalrez® parts.
Get the Right Fit.
Contact Our Kalrez® Seal Expert.
Ben Brocker, Kalrez® Expert