Kalrez® UltraPure™ O-ring KF/NW40 42×5 mm – FFKM

Kalrez® UltraPure™ is a premium range of FFKM (perfluoroelastomer) seals designed for environments where standard elastomers (NBR/FKM/EPDM) are insufficient. This O-ring is designated for use in KF/NW40 assemblies (vacuum systems) and is typically applied where high chemical resistance, thermal stability, and reliable sealing during long-term operation are required.

It is precisely the type of seal that makes sense in clean and demanding operations (e.g., technology, laboratories, vacuum assemblies, process gases), where a costly shutdown is far more expensive than the O-ring itself.

Technical parameters:

• Manufacturer / brand: DuPont Kalrez®
• Series: UltraPure™
• Type: Custom O-ring
• Application: KF/NW40
• Material: FFKM (perfluoroelastomer)
• Compound: 8900
• Dimension: 42.00 × 5.00 mm (Nominal)
• Cure date: 05/11/2022 (production / vulcanisation date)
• Country of origin: USA

Applications:
Demanding seals for KF/NW40 vacuum assemblies, process gases, and chemically aggressive environments – wherever higher resistance than standard FKM/NBR seals is required and where reliability and long service life are worthwhile.

Kalrez UltraPure O-ring 42x5, DuPont Kalrez 8900 compound, FFKM O-ring KF40, NW40 vacuum O-ring 42x5, perfluoroelastomer O-ring