Waters Needle Seals 22 Gauge Pack of 10 Seals

Waters Performance Maintenance Needle Seals – 22 Gauge, High-Pressure Injector Sealing Vespel Matrix, Flow-Path Optimization (MPN: 700002208)

The 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.

Technical Performance and Design

• Chemical-Resistant Vespel Material Matrix: 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.

• Precision 22-Gauge Internal Seat: 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.

• High-Backpressure Flow Alignment: 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.

• Anti-Contamination Surface Geometry: 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.

Product Specifications

• Catalog Number / MPN: 700002208

• Manufacturer / Brand: Waters Corporation

• Component Type: Analytical Autosampler Needle Seal Replacement

• Needle Gauge Compatibility: 22 Gauge (22 ga) standard sampling needles

• Material Composition: Premium Vespel Polyimide Matrix Composite

• System Line Compatibility: Tailored for Waters legacy HPLC lines, Alliance 2690, 2695, and 2795 Separations Modules

• Standard Case Configuration: Typically supplied by the factory as a standalone component or as part of primary preventative maintenance (PM) multi-packs

Key Benefits and Applications

• Preventative Maintenance Rebuilds: 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.

• Injection Volume Reproducibility: 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.

• Low-Wear Mechanical Lifespan: 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.

• Universal Mobile Phase Resilience: Withstands continuous interaction with harsh phase streams, including high acetonitrile concentrations, methanol mixes, tetrahydrofuran (THF), and aggressive salt buffers without swelling or leaking.

All product names, logos, and brands are property of their respective owners.