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

Edwards DN 25 ISO-KF Centering Ring (C10514394) – Polymer with FKM O-Ring, Lot of 3

The Edwards C10514394 is a specialized vacuum sealing assembly designed for NW25 (KF25) connections where metallic contact must be avoided or where weight and magnetic interference are concerns. This assembly features a high-durability polymer centering ring paired with a premium FKM (Fluoroelastomer/Viton) O-ring. By utilizing a non-metallic carrier, this seal provides excellent chemical resistance and high-vacuum integrity, making it an ideal choice for advanced analytical instrumentation and cleanroom environments.

Technical Performance & Design

• Chemical-Resistant Polymer Carrier: The centering ring is fabricated from a high-performance technical polymer (typically PPS or similar), which provides a lightweight, corrosion-proof alternative to stainless steel or aluminum.
• High-Performance FKM O-Ring: Features an FKM (Viton) elastomer that offers superior thermal stability and resistance to aggressive chemicals, oils, and solvents compared to standard Nitrile seals.
• Non-Magnetic & Non-Conductive: The polymer construction ensures the seal is electrically insulating and non-magnetic, which is critical for use in sensitive mass spectrometry or electron microscopy stages.
• ISO-KF Standard Interface: Fully compliant with ISO 2861 dimensions, ensuring a universal, leak-tight fit with any standard DN 25 / NW25 / KF25 vacuum flange and clamp system.

Product Specifications

• Part Number: C10514394
• Flange Size: DN 25 ISO-KF (NW25 / KF25)
• Ring Material: High-Performance Polymer
• Seal Material: FKM (Fluoroelastomer / Viton)
• Quantity: Lot of 3 Seals
• Vacuum Rating: High Vacuum performance down to 10^-8 mbar

Key Benefits & Applications

• Analytical Instrument Isolation: Ideal for mass spectrometers (GC-MS/LC-MS) and surface science tools where preventing metallic contamination or electrical loops is essential.
• Corrosive Gas Handling: The combination of polymer and FKM provides the highest level of protection against acidic vapors and halogenated gases that might pit or corrode metal rings.
• Low Outgassing Standards: FKM material ensures minimal gas evolution under vacuum, helping to maintain ultra-low baseline pressures in sensitive R&D setups.
• Rapid Tool-Free Assembly: The KF (Kleinflansch) design allows for immediate, manual installation using standard wing-nut clamps, facilitating efficient preventative maintenance.

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.