Edwards Nitrile Centring Ring Aluminum DN 25 ISO-KF NW25 Lot of 4 Seals

Edwards DN 25 ISO-KF Centering Ring (C10514398) – Aluminum with Nitrile O-Ring, Lot of 4

The Edwards C10514398 is a critical sealing component designed to align and seal two NW25 (KF25) vacuum flanges. This assembly consists of a high-quality aluminum centering ring that provides structural support and a Nitrile (Buna-N) O-ring that creates the vacuum-tight interface. Engineered for general-purpose vacuum applications, these seals ensure a reliable "metal-to-metal" stop to prevent O-ring over-compression, maintaining system integrity in primary and high-vacuum lines.

Technical Performance & Design

• Precision Aluminum Carrier: The centering ring is machined from high-grade aluminum to ensure perfect concentricity and prevent lateral shifting of the seal during clamp tightening.
• Nitrile (Buna-N) Elastomer: Features a Nitrile O-ring known for excellent resistance to petroleum-based oils, water, and many alcohols, making it the standard choice for "roughing" vacuum systems.
• Trapped O-Ring Geometry: The ring design "traps" the elastomer, preventing it from being drawn into the vacuum chamber under high-pressure differentials or pump-down cycles.
• ISO-KF Standard Compatibility: Fully compliant with ISO 2861 dimensions, ensuring a universal fit with all NW25/KF25 flanges from various vacuum hardware manufacturers.

Product Specifications

• Part Number: C10514398
• Flange Size: DN 25 ISO-KF (NW25 / KF25)
• Ring Material: Aluminum
• Seal Material: Nitrile (Buna-N)
• Quantity: Lot of 4 Seals
• Temperature Range: -20°C to 100°C (Continuous)

Key Benefits & Applications

• Reliable Vacuum Sealing: Provides a leak-tight seal for pressures down to $10^{-7}$ mbar, suitable for forelines, roughing lines, and general laboratory vacuum manifolds.
• Cost-Effective Bulk Pack: This lot of four is ideal for routine maintenance schedules and preventative service of turbomolecular pump inlets or backing lines.
• Ease of Installation: The shorthand KF (KLEINFLANSCH) design allows for rapid, tool-free assembly when used with standard wing-nut swing clamps.
• Wide Industrial Utility: Widely utilized in mass spectrometry, freeze drying, and glove box vacuum ports where a robust and economical seal is required.

Edwards® and the Edwards logo are trademarks of Edwards Limited. ISO-KF, NW, and KF refer to international standards for vacuum fittings (ISO 2861 / DIN 28403).