{"product_id":"edwards-centring-ring-only-aluminum-dn-25-iso-kf-nw25","title":"Edwards Centring Ring Only Aluminum DN 25 ISO-KF NW25 Lot of 25 Center Rings","description":"\u003ch3\u003eEdwards DN 25 ISO-KF Centering Ring Only – Aluminum, Lot of 25\u003c\/h3\u003e\n\u003cp\u003eThe Edwards DN 25 centering ring is a precision-engineered structural component designed to align and support the elastomer seal between two NW25 (KF25) vacuum flanges. This lot of 25 \"ring-only\" components is intended for high-volume laboratories and facilities that maintain their own stock of O-rings (such as FKM, Nitrile, or Silicone) or require frequent replacement of the metal carrier due to mechanical wear or contamination. These rings ensure a repeatable, concentric seal that prevents O-ring extrusion under vacuum pressure.\u003c\/p\u003e\n\u003ch3\u003eTechnical Performance \u0026amp; Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision Aluminum Machining: Fabricated from high-grade aluminum alloy, providing a lightweight yet rigid frame that ensures a metal-to-metal stop between flanges, preventing over-compression of the seal.\u003c\/li\u003e\n\u003cli\u003eHigh-Vacuum Compatibility: Designed to support vacuum integrity down to $10^{-8}$ mbar when paired with high-quality elastomers and standard ISO-KF wing-nut clamps.\u003c\/li\u003e\n\u003cli\u003eStandard ISO-KF Interface: Fully compliant with ISO 2861 dimensional standards, ensuring universal compatibility with NW25, KF25, and DN 25 flanges from all major vacuum hardware manufacturers.\u003c\/li\u003e\n\u003cli\u003eTapered Inner Geometry: Features a smooth, tapered profile to maximize conductance and minimize turbulence in the vacuum line, which is critical for efficient pump-down cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: Component of C10514398 \/ C10514399 series\u003c\/li\u003e\n\u003cli\u003eFlange Size: DN 25 ISO-KF (NW25 \/ KF25)\u003c\/li\u003e\n\u003cli\u003eMaterial: Aluminum\u003c\/li\u003e\n\u003cli\u003eConfiguration: Center Ring Only (O-Ring not included)\u003c\/li\u003e\n\u003cli\u003eQuantity: Lot of 25 Rings\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: Approx. 26 mm (Standard for DN 25 inner carrier)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Benefits \u0026amp; Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCost-Effective Bulk Maintenance: This lot of 25 is ideal for large-scale vacuum manifolds and facilities where rings are treated as semi-consumable parts during aggressive cleaning or \"bake-out\" procedures.\u003c\/li\u003e\n\u003cli\u003eCustom Seal Flexibility: Allows users to choose their own O-ring material (e.g., swapping between Buna-N for roughing and Viton for high-temp) without being restricted to pre-assembled sets.\u003c\/li\u003e\n\u003cli\u003ePrimary \u0026amp; Secondary Vacuum Lines: Frequently used in foreline plumbing, bypass valves, and exhaust lines for rotary vane, scroll, and turbomolecular pumps.\u003c\/li\u003e\n\u003cli\u003eRapid Bench-Top Assembly: The KF (Kleinflansch) shorthand design allows for quick, tool-free installation, making it the preferred standard for modular R\u0026amp;D and bioprocessing setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003csmall\u003eEdwards® and the Edwards logo are trademarks of Edwards Limited. ISO-KF, NW, and KF refer to international vacuum hardware standards (ISO 2861 \/ DIN 28403). Ensure O-rings are lubricated with high-vacuum grease (e.g., Apiezon) for optimal performance.\u003c\/small\u003e\u003c\/p\u003e","brand":"Edwards","offers":[{"title":"Default Title","offer_id":49090694873340,"sku":"10722","price":85.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8463\/5132\/files\/edwards-centring-ring-only-aluminum-dn-25-iso-kf-nw25-lot-of-25-center-rings-other-pump-parts-accessories-edwards-120104.jpg?v=1778635475","url":"https:\/\/lifesciencestrading.com\/products\/edwards-centring-ring-only-aluminum-dn-25-iso-kf-nw25","provider":"Life Sciences Trading","version":"1.0","type":"link"}