Kalrez® Spectrum™ 7075
New Kalrez® Spectrum™ 7075 seals deliver longer service life initial force
New Kalrez® Spectrum™ 7075 parts from DuPont™ Performance Elastomers deliver longer service life and enhanced sealability. They have an extremely low compression set and a higher thermal resistance allowing processing at service temperature of up to 327ºC. With excellent thermal cycling and an even better chemical resistance than Kalrez® 4078, Kalrez® Spectrum™ 7075 is the ideal sealing solutions for many applications in chemical and hydrocarbon processing. So if you want to reduce downtime, maintenance costs and increase MBTR while improving productivity, try new Kalrez® Spectrum™ 7075 and find out what it can do for you and your business.
| Hardness, Shore A ± 5 | |
|---|---|
| (range 70-80 Shore A) | 75 |
| 100% Modulus 2, MPa (psi) | 7.6 (1100) |
| Tensile at break, MPa (psi) | 17.9 (2600) |
| Elongation at break, % | 160 |
| Compression set, % | |
| 70 hr at 204°C (400°F) 3 | 15 |
| 70 hr at 204°C (400°F) 4 | 12 |
| Maximum service temperature, °C (°F) | 327 (620) |
| Lower service temperature, °C (°F) | -20 (-4) |
- Not to be used for specifactions
- ASTM D412, 500 mm/min
- ASTM D395B, O-rings
- ASTM D345B, pellets
Compression Set at 204°C
Kalrez ® Spectrum™ 7075 designed specifically for the needs of the chemical and hydrocarbon processing industry
Kalrez® Spectrum™ 7075 broadens the family of Spectrum™ sealing solutions with a compound that has enhanced physical performance properties. The sealing force retention of Kalrez® Spectrum™ 7075 is about 10% better than Kalrez® 4079. To provide even greater performance in applications where low friction is required, Kalrez® Spectrum™ 7075 O-rings have a glossier finish than other Kalrez® parts. It is a carbon-black filled compound with mechanical properties designed for improving sealing performance in temperature cycling applications. All this results in improved sealing and longer service life.
Sealing Force Retention at 204°C
Advancements in Polymer Technology Have Improved Chemical Resistance of Elastomers
Initial field test reports confirm: Kalrez® Spectrum™ 7075 is the ideal choice for difficult sealing environments. Initial field test reports substantiate our performance expectations for Kalrez® Spectrum™ 7075.
| Application | Chemicals | Temperature | Previous material | Results |
|---|---|---|---|---|
| Mechanical seals | Multiple chemical | Up to 300°C | Various FFKMs tested | Kalrez® Spectrum™ 7075 chosen as an environments upgrade from Kalrez® 4079 because the mechanical properties of Kalrez® Spectrum™ 7075 allowed the manufacturer to use lower spring tension and smaller components for seal design innovation |
| Quick disconnects | Marlotherm® LH | 270°C for 1008 h | Kalrez® 4079 | 50% reduced volume swell combined with a low coefficient of thermal expansion provides reliable on/off performance |
| Proprietary | Not applicable | Cycling between 200°C and 350°C | New application Various elastomers tested | Kalrez® Spectrum™ 7075 was the only elastomer that could be used for several hundred cycles due to its sealing force retention |
| Hot glue application nozzle | Solvents | 100 - 250°C | Kalrez® 4079 and Kalrez® SpectrumTM 6375 tested | Mechanical properties and chemical resistance of Kalrez® Spectrum™ 7075 reduced variability of glue flow in the nozzle |
| Rotary joint assembly | Hot oil | 200 - 300°C | Kalrez® 4079 | Better sealing performance |
Kalrez® is a registered trademark of DuPont™ Performance Elastomers
Spectrum™ is a trademark of DuPont™ Performance Elastomers
DuPont™ is a trademark of DuPont™ Performance Elastomers