Edwards FKM GP Centring Ring Stainless Steel DN 25 ISO-KF NW25 Lot of 3 Seals

Edwards DN 25 ISO-KF Centering Ring (C10514395) – Stainless Steel with FKM O-Ring, Lot of 3

The Edwards C10514395 is a premium vacuum sealing assembly designed for NW25 (KF25) high-vacuum connections where chemical resistance and thermal stability are paramount. This assembly combines a 304-grade stainless steel centering ring with a high-performance FKM (Fluoroelastomer/Viton) O-ring. These seals are specifically engineered to maintain vacuum integrity in systems exposed to elevated temperatures or aggressive chemical vapors, making them the gold standard for advanced analytical and semiconductor research applications.

Technical Performance & Design

• High-Performance FKM Elastomer: The O-ring is manufactured from Viton/FKM, providing superior resistance to hydrocarbons, solvents, and many acids compared to standard Nitrile seals.
• 304 Stainless Steel Carrier: The centering ring is machined from 304 stainless steel, ensuring high mechanical strength and preventing corrosion even when used in "wet" vacuum environments.
• Low Outgassing Properties: FKM material is characterized by extremely low outgassing rates, which is critical for achieving and maintaining high-vacuum levels without sample contamination.
• ISO-KF Standard Fitment: Fully compliant with ISO 2861 standards, allowing for a universal, leak-tight fit with any standard DN 25 / NW25 / KF25 vacuum flange.

Product Specifications

• Part Number: C10514395
• Flange Size: DN 25 ISO-KF (NW25 / KF25)
• Ring Material: 304 Stainless Steel
• Seal Material: FKM (Fluoroelastomer / Viton)
• Quantity: Lot of 3 Seals
• Temperature Rating: Sustained operation up to 150°C (Intermittent up to 200°C)

Key Benefits & Applications

• High-Temperature Processing: Ideal for vacuum lines on mass spectrometers and leak detectors where heat is used to prevent the condensation of process gases.
• Aggressive Chemical Handling: Recommended for chemical vapor deposition (CVD) and organic synthesis where standard Buna-N seals would degrade or swell.
• Long-Term Vacuum Stability: Maintains a leak-tight seal for pressures down to $10^{-8}$ mbar, reducing the frequency of seal replacements in critical bioprocess setups.
• Tool-Free "KF" Connectivity: The KF (Kleinflansch) shorthand design ensures rapid assembly with standard swing clamps, facilitating efficient preventative maintenance cycles.

Edwards® and the Edwards logo are trademarks of Edwards Limited. ISO-KF, NW, and KF refer to international vacuum standards (ISO 2861 / DIN 28403). Viton™ is a trademark of The Chemours Company.