{"product_id":"waters-needle-seals-22-gauge","title":"Waters  Needle Seals 22 Gauge Pack of 10 Seals","description":"\u003ch3\u003eWaters Performance Maintenance Needle Seals – 22 Gauge, High-Pressure Injector Sealing Vespel Matrix, Flow-Path Optimization (MPN: 700002208)\u003c\/h3\u003e\n\u003cp\u003eThe Waters 700002208 (also cataloged as Part Number 700002208) is an instrument-grade, high-pressure needle seal component precision-engineered for the sample injection fluidics of Waters High-Performance Liquid Chromatography (HPLC) autosamplers. Specifically configured for 22-gauge sample needles, this critical component establishes a tight, high-pressure mechanical seal around the needle tip during active injection cycles. Machined from premium, robust Vespel polymer composite, it is designed to withstand the continuous mechanical insertion friction and extreme system backpressures characteristic of analytical separation lines. By sealing the high-pressure sample loop from localized atmospheric leakage, it secures highly reproducible injection volumes, prevents baseline drift, and eliminates cross-well sample carryover.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Performance and Design\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eChemical-Resistant Vespel Material Matrix:\u003c\/b\u003e Fabricated from high-purity Vespel polymer compound. This advanced material provides exceptional dimensional stability, structural durability under high friction, and outstanding universal chemical compatibility across typical HPLC organic solvents, buffers, and dilute acid lines.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003ePrecision 22-Gauge Internal Seat:\u003c\/b\u003e Machined to exact internal dimensions that perfectly match the outer taper of standard Waters 22-gauge stainless steel autosampler needles. This tight tolerance ensures an instantaneous, drop-in mechanical fit that eliminates sample weeping.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eHigh-Backpressure Flow Alignment:\u003c\/b\u003e Engineered to maintain structural seal integrity through demanding high-pressure mobile phase loops, helping the injector station run smoothly without contributing to chromatographic peak tailing or ghost peaks.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eAnti-Contamination Surface Geometry:\u003c\/b\u003e The internal fluidic path is polished to reduce dead-volume pockets. This smooth transition design minimizes target molecule stickiness and localized sample carryover, safeguarding baseline metrics on high-sensitivity mass spectrometers.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eCatalog Number \/ MPN:\u003c\/b\u003e 700002208\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eManufacturer \/ Brand:\u003c\/b\u003e Waters Corporation\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eComponent Type:\u003c\/b\u003e Analytical Autosampler Needle Seal Replacement\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eNeedle Gauge Compatibility:\u003c\/b\u003e 22 Gauge (22 ga) standard sampling needles\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eMaterial Composition:\u003c\/b\u003e Premium Vespel Polyimide Matrix Composite\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eSystem Line Compatibility:\u003c\/b\u003e Tailored for Waters legacy HPLC lines, Alliance 2690, 2695, and 2795 Separations Modules\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eStandard Case Configuration:\u003c\/b\u003e Typically supplied by the factory as a standalone component or as part of primary preventative maintenance (PM) multi-packs\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Benefits and Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003ePreventative Maintenance Rebuilds:\u003c\/b\u003e The core component required to resolve standard autosampler leak codes, seal-characterization errors, or visible wash-station overflow errors during routine yearly system tune-ups.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eInjection Volume Reproducibility:\u003c\/b\u003e Restores absolute volumetric control, ensuring that the precise nanoliter or microliter volumes drawn by the needle are transferred to the analytical column without pressure drops.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eLow-Wear Mechanical Lifespan:\u003c\/b\u003e The low-friction characteristics of the polymer core help prevent fine stainless steel scratch fragments from peeling off the sample needle, extending the running time of the overall injection manifold.\u003c\/p\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cp style=\"margin: 0;\"\u003e\u003cb\u003eUniversal Mobile Phase Resilience:\u003c\/b\u003e Withstands continuous interaction with harsh phase streams, including high acetonitrile concentrations, methanol mixes, tetrahydrofuran (THF), and aggressive salt buffers without swelling or leaking.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\u003cp style=\"margin: 0; font-size: 0.8em;\"\u003e\u003ci\u003eAll product names, logos, and brands are property of their respective owners.\u003c\/i\u003e\u003c\/p\u003e","brand":"Waters","offers":[{"title":"Default Title","offer_id":44496859693308,"sku":"HPLC_32","price":60.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8463\/5132\/files\/s-l1600_-_2026-07-10T101013.828-fotor-20260710101457_Shopify_1024.jpg?v=1783696623","url":"https:\/\/lifesciencestrading.com\/products\/waters-needle-seals-22-gauge","provider":"Life Sciences Trading","version":"1.0","type":"link"}