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Identification & Functionality
Kalrez® Spectrum™ 6375 Features & Benefits
- Kalrez® Spectrum™ 6375 is a carbon black-filled product for general use in O-rings, seals, diaphragms and other parts specifically for the chemical process industry.
- This product has excellent broad chemical resistance, good mechanical properties, and outstanding hot-air aging properties.
- Kalrez® Spectrum™ 6375 is well suited for use in mixed process streams because of its excellent resistance to acids, bases, and amines. It is also recommended for use in hot water, steam, pure ethylene oxide and propylene oxide.
Applications & Uses
Properties
| Value | Units | Test Method / Conditions | |
| Modulus (at 100% Elongation) | 9.1 | MPa | ASTM D 412 |
| Tensile Strength | 15.2 | MPa | ASTM D 412 |
| Elongation (at Break) | 160 | % | ASTM D 412 |
| Hardness (Shore A) | 75 | - | ASTM D 2240 |
| Compression Set (Pellet Type 1, at 204°C, 70h) | 24 | % | ASTM D 395B |
| Compression Set (O-Ring AS568-214, at 204°C, 70h) | 25 | % | ASTM D 1414 |
| Value | Units | Test Method / Conditions | |
| Maximum Service Temperature ¹ | 275 | °C | - |
| Lowest Service Temperature ¹ | -20 | °C | - |
| Value | Units | Test Method / Conditions | |
| Glass Transition Temperature (at 10°C/min) | -3.8 | °C | ASTM D 3418 |
| Coefficient of Linear Thermal Expansion | 2.89 | E-4/°C | ISO 11359-1/-2 |
| Retraction Temperature (TR-10) | -3 | °C | ASTM D 1329 |
| Value | Units | Test Method / Conditions | |
| Density | 1.99 | g/cm³ | ISO 1183 |
- [1]: DuPont proprietary test method; useful temperature range may vary with seal design and application specifics
For many applications, low volume swell of elastomers is critical to proper operation of equipment. Excessive swell may cause permanent seal failure due to equipment hang \up, extrusion, etc. The following data is the result of lab testing to determine the volume swell of Kalrez® Spectrum™ 6375 when exposed to various fluids. Other physical property testing is needed to further define product performance; however, volume swell is an excell ent predictor of performance. The following chemicals represent some of themost aggressive applications in the industry. These test results are an indication of the performance of compound 6375; however, all applications are unique, and it is strongly recommended that immersion testing be performed in the actual process fluids.
| Chemical |
Temperature°C (°F) |
Kalrez® Spectrum™ 6375 Rating |
Nearest Competitive FFKM |
|---|---|---|---|
|
Water |
225 (437) |
A | C |
| Glacial acetic acid |
100 (212) |
A | A |
| Nitric acid (70%) |
85 (185) |
B | C |
| Sulfuric acid (98%) |
150 (302) |
A | C |
| Maleic acid |
90 (194) |
A | B |
| Ammonium hydroxide |
100 (212) |
B | B |
| Ethylene oxide |
50 (122) |
A | A |
| Urea |
175 (347) |
A | B |
| Epichlorohydrin |
100 (212) |
A | A |
| Butyraldehyde |
70 (158) |
A | B |
| Toluene diisocyanate |
100 (212) |
A | B |
| HCFC 134a |
25 (77) |
A | A |
Rating system:
A = 0 - 10% volume swell
B = 10 - 20% volume swell
C = >20% volume swel
Technical Details & Test Data
Kalrez® Spectrum™ 6375 has excellent heat resistance to go along with its outstanding chemical resistance. Its proprietary curing technology allows this product to have a maximum service temperature of 275°C (525°F). One method of predicting heat resistance is compression set. This is defined as: the amount by which a standard test piece (typically an O-ring or pellet) fails to return to its original thickness after being subjected to a standard compressive load or deflection for a fixed period of time. This chart following shows some elastomer comparisons with regard to compression set resistance.
Compression Set vs. Time at 204°C (400°F)
